def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
class PLThinFilm(Spyrelet):
requires = {'wm': Bristol_771}
qutag = None
laser = NetworkConnection('1.1.1.1')
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start, self.qutag.SIGNALCOND_MISC,
True, 1)
self.qutag.setSignalConditioning(stop, self.qutag.SIGNALCOND_MISC,
True, 0.1)
self.qutag.enableChannels((start, stop))
def homelaser(self, start):
current = self.wm.measure_wavelength()
with Client(self.laser) as client:
while current < start - 0.001 or current > start + 0.001:
setting = client.get('laser1:ctl:wavelength-set', float)
offset = current - start
client.set('laser1:ctl:wavelength-set', setting - offset)
time.sleep(3)
current = self.wm.measure_wavelength()
print(current, start)
def createHistogram(self, stoparray, timebase, bincount, period, index,
wls):
hist = [0] * bincount
for stoptime in stoparray:
binNumber = int(stoptime * timebase * bincount / (period))
if binNumber >= bincount:
continue
else:
hist[binNumber] += 1
out_name = "D:\\Data\\9.04.2019\\1T"
np.savez(os.path.join(out_name, str(index + 59)), hist, wls)
#np.savez(os.path.join(out_name,str(index+40)),hist,wls)
print('Data stored under File Name: ' +
self.exp_parameters.widget.get()['File Name'] + str(index))
@Task()
def startpulse(self, timestep=100e-9):
##Qutag Part
self.configureQutag()
expparams = self.exp_parameters.widget.get()
wlparams = self.wl_parameters.widget.get()
self.homelaser(wlparams['start'])
print('Laser Homed!')
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
for i in range(expparams['# of points']):
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls = []
lost = self.qutag.getLastTimestamps(True)
while time.time(
) - startTime < expparams['Measurement Time'].magnitude:
lost = self.qutag.getLastTimestamps(True)
time.sleep(5 * 0.1)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
wls.append(str(self.wm.measure_wavelength()))
self.createHistogram(stoparray, timebase, bincount, 0.1, i, wls)
print(i)
with Client(self.laser) as client:
setting = client.get('laser1:ctl:wavelength-set', float)
client.set('laser1:ctl:wavelength-set', setting - 0.008)
time.sleep(1)
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Wavelength parameters')
def wl_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('start', {
'type': float,
'default': 1535.71
}),
('stop', {
'type': float,
'default': 1535.50
})
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {
'type': int,
'default': 50
}),
('Measurement Time', {
'type': int,
'default': 100,
'units': 's'
}),
('File Name', {
'type': str
})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {
'type': int,
'default': 0
}),
('Stop Channel', {
'type': int,
'default': 1
}),
('Bin Count', {
'type': int,
'default': 1000
})
]
w = ParamWidget(params)
return w
@startpulse.initializer
def initialize(self):
self.wm.start_data()
@startpulse.finalizer
def finalize(self):
self.wm.stop_data()
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
class DarkCount(Spyrelet):
requires = {'srs': SRS900}
qutag = None
currents = []
darkcountspercurrent = []
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
@Task()
def getDarkCounts(self):
self.srs.SIM928_voltage[5] = 0
#self.srs.SIM928_voltage[6]=0
#self.srs.module_reset[6]
self.srs.module_reset[5]
self.srs.wait_time(100000)
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop_1 = qutagparams['Stop Channel 1']
#stop_2 = qutagparams['Stop Channel 2']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start, self.qutag.SIGNALCOND_MISC,
True, 0.1)
#self.qutag.setSignalConditioning(stop_1,self.qutag.SIGNALCOND_MISC,True,0.1)
self.qutag.enableChannels((start, stop_1))
biasCurrentParams = self.bias_current.widget.get()
qutagParams = self.qutag_params.widget.get()
resistance = 10000
startCurrent = biasCurrentParams['Start Current'].to('A').magnitude
stepSize = biasCurrentParams['Step Size'].to('A').magnitude
stopCurrent = biasCurrentParams['Stop Current'].to('A').magnitude
print('start current is' + str(startCurrent))
print('step size is' + str(stepSize))
print('stop current is' + str(stopCurrent))
expParams = self.exp_params.widget.get()
currentCurrent = startCurrent
self.srs.SIM928_voltage[5] = currentCurrent * resistance
self.srs.SIM928_on[5]
self.srs.wait_time(100000)
points = ((stopCurrent - startCurrent) / stepSize) + (1 + stepSize)
print(points)
BC = []
DCR_1 = []
for i in range(int(points)):
lost = self.qutag.getLastTimestamps(True)
time.sleep(expParams['Exposure Time'].magnitude)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
print(tchannel)
darkcounts = values
BC.append(currentCurrent)
self.currents.append(currentCurrent * resistance)
DCR_1.append(darkcounts / expParams['Exposure Time'].magnitude)
self.darkcountspercurrent.append(
darkcounts / expParams['Exposure Time'].magnitude)
currentCurrent += stepSize
self.srs.SIM928_voltage[5] = currentCurrent * resistance
values = {
'bc': self.currents,
'dc': self.darkcountspercurrent,
}
self.getDarkCounts.acquire(values)
self.srs.SIM928_voltage[5] = 0
self.srs.module_reset[5]
datadir = 'D:\Data\\09.09.2019\\'
print(BC)
print(DCR_1)
np.savetxt(datadir + expParams['File Name'] + '.csv', (BC, DCR_1),
delimiter=',')
print('Data stored under File Name: ' + expParams['File Name'])
return
@Element(name='Bias Current')
def bias_current(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Current', {
'type': float,
'default': 2,
'units': 'uA'
}),
('Step Size', {
'type': float,
'default': 0.2,
'units': 'uA'
}),
('Stop Current', {
'type': float,
'default': 10,
'units': 'uA'
})
]
w = ParamWidget(params)
return w
@Element(name='Experimental Parameters')
def exp_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Exposure Time', {
'type': int,
'default': 10,
'units': 's'
}),
('Points per Bias Current', {
'type': int,
'default': 1.0
}),
('File Name', {
'type': str
})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {
'type': int,
'default': 0
}),
('Stop Channel 1', {
'type': int,
'default': 1
}),
('Stop Channel 2', {
'type': int,
'default': 2
}),
('Total Hist Width Multiplier', {
'type': int,
'default': 5
}),
('Bin Count', {
'type': int,
'default': 1000
})
]
w = ParamWidget(params)
return w
@getDarkCounts.initializer
def initialize(self):
print('The identification of this instrument is : ' + self.srs.idn)
print(self.srs.self_test)
return
@getDarkCounts.finalizer
def finalize(self):
return
@Element(name='Histogram')
def darkcountsplot(self):
p = LinePlotWidget()
p.plot('Dark Counts vs. Bias Current')
return p
@darkcountsplot.on(getDarkCounts.acquired)
def darkcountsplot_update(self, ev):
w = ev.widget
bc = np.array(self.currents)
cs = np.array(self.darkcountspercurrent)
w.set('Dark Counts vs. Bias Current', xs=bc, ys=cs)
return
class Lifetime(Spyrelet):
requires = {
'wm': Bristol_771
}
qutag = None
conn1 = NetworkConnection('1.1.1.2')
#conn1 = conn1 = SerialConnection('COM1')
dlc = Client(conn1)
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start,self.qutag.SIGNALCOND_MISC,True,1)
self.qutag.setSignalConditioning(stop,self.qutag.SIGNALCOND_MISC,True,0.1)
self.qutag.enableChannels((start,stop))
def createHistogram(self,stoparray, timebase, bincount, period, index, wls):
hist = [0]*bincount
for stoptime in stoparray:
binNumber = int(stoptime*timebase*bincount/(period))
if binNumber >= bincount:
continue
else:
hist[binNumber]+=1
out_name = "D:\\Data\\10.9.2019\\film"
np.savez(os.path.join(out_name,str(index)),hist,wls)
#np.savez(os.path.join(out_name,str(index+40)),hist,wls)
print('Data stored under File Name: ' + self.exp_parameters.widget.get()['File Name'] + str(index))
@Task()
def startpulse(self, timestep=1e-9):
with Client(self.conn1) as dlc:
print(dlc.get("laser1:ctl:wavelength"))
time.sleep(1000)
self.configureQutag()
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
expparams = self.exp_parameters.widget.get()
for i in range(expparams['# of points']):
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls=[]
lost = self.qutag.getLastTimestamps(True)
while time.time()-startTime < expparams['Measurement Time'].magnitude:
lost = self.qutag.getLastTimestamps(True)
time.sleep(30*100e-3)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
wls.append(str(self.wm.measure_wavelength()))
self.createHistogram(stoparray, timebase, bincount, 100e-3,i, wls)
print(i)
#self.fungen.voltage[2] = self.fungen.voltage[2].magnitude + 2*dcparams['DC step size'].magnitude
#time.sleep(100000)
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Pulse parameters')
def pulse_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('pulse height', {'type': float, 'default': 3, 'units':'V'}),
('pulse width', {'type': float, 'default': 500e-9, 'units':'s'}),
('period', {'type': float, 'default': 0.1, 'units':'s'}),
]
w = ParamWidget(params)
return w
@Element(name='DC parameters')
def DC_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('DC height', {'type': float, 'default': 0, 'units':'V'}),
('DC step size', {'type': float, 'default': 0.1, 'units':'V'}),
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {'type': int, 'default': 10}),
('Measurement Time', {'type': int, 'default': 10, 'units':'s'}),
('File Name', {'type': str})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {'type': int, 'default': 0}),
('Stop Channel', {'type': int, 'default': 1}),
('Bin Count', {'type': int, 'default': 1000})
]
w = ParamWidget(params)
return w
@startpulse.initializer
def initialize(self):
self.wm.start_data()
@startpulse.finalizer
def finalize(self):
self.wm.stop_data()
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
class Lifetime(Spyrelet):
requires = {'fungen': Keysight_33622A, 'wm': Bristol_771}
qutag = None
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start, self.qutag.SIGNALCOND_MISC,
True, 1)
self.qutag.setSignalConditioning(stop, self.qutag.SIGNALCOND_MISC,
True, 0.1)
self.qutag.enableChannels((start, stop))
def createHistogram(self, stoparray, timebase, bincount, period, index,
wls):
hist = [0] * bincount
for stoptime in stoparray:
binNumber = int(stoptime * timebase * bincount / (period))
if binNumber >= bincount:
continue
else:
hist[binNumber] += 1
out_name = "D:\\Data\\9.1.2019\\T1"
np.savez(os.path.join(out_name, str(index)), hist, wls)
#np.savez(os.path.join(out_name,str(index+40)),hist,wls)
print('Data stored under File Name: ' +
self.exp_parameters.widget.get()['File Name'] + str(index))
@Task()
def startpulse(self, timestep=1e-9):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
params = self.pulse_parameters.widget.get()
pulse = Arbseq_Class('pulse', timestep)
pulse.delays = [0]
pulse.heights = [1]
pulse.widths = [params['pulse width'].magnitude]
pulse.totaltime = params['pulse width'].magnitude
pulse.nrepeats = 0
pulse.repeatstring = 'once'
pulse.markerstring = 'highAtStartGoLow'
pulse.markerloc = 0
pulse.create_sequence()
dc = Arbseq_Class('dc', timestep)
dc.delays = [0]
dc.heights = [0]
dc.widths = [params['pulse width'].magnitude]
dc.totaltime = params['pulse width'].magnitude
dc.repeatstring = 'repeat'
dc.markerstring = 'lowAtStart'
dc.markerloc = 0
period = params['period'].magnitude
width = params['pulse width'].magnitude
repeats = period / width - 1
dc.nrepeats = repeats
dc.create_sequence()
dc2 = Arbseq_Class('dc', timestep)
dc2.delays = [0]
dc2.heights = [1]
dc2.widths = [params['pulse width'].magnitude]
dc2.totaltime = params['pulse width'].magnitude
dc2.repeatstring = 'repeat'
dc2.markerstring = 'lowAtStart'
dc2.markerloc = 0
period = params['period'].magnitude
print(period)
width = params['pulse width'].magnitude
repeats = period / width
dc2.nrepeats = repeats
dc2.create_sequence()
self.fungen.send_arb(pulse, 1)
self.fungen.send_arb(dc, 1)
self.fungen.send_arb(dc2, 2)
seq1 = [pulse, dc]
self.fungen.create_arbseq('pulsetest', seq1, 1)
self.fungen.wait()
self.fungen.voltage[1] = params['pulse height']
self.fungen.output[1] = 'ON'
dcparams = self.DC_parameters.widget.get()
self.fungen.create_arbseq('dc2', [dc2], 2)
self.fungen.wait()
self.fungen.voltage[2] = dcparams['DC height']
self.fungen.output[2] = 'ON'
self.configureQutag()
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
expparams = self.exp_parameters.widget.get()
for i in range(expparams['# of points']):
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls = []
lost = self.qutag.getLastTimestamps(True)
while time.time(
) - startTime < expparams['Measurement Time'].magnitude:
lost = self.qutag.getLastTimestamps(True)
time.sleep(30 * period)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
wls.append(str(self.wm.measure_wavelength()))
self.createHistogram(stoparray, timebase, bincount, period, i, wls)
print(i)
self.fungen.voltage[2] = self.fungen.voltage[
2].magnitude + 2 * dcparams['DC step size'].magnitude
time.sleep(100000)
self.fungen.output[1] = 'OFF'
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Pulse parameters')
def pulse_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('pulse height', {
'type': float,
'default': 3,
'units': 'V'
}),
('pulse width', {
'type': float,
'default': 500e-9,
'units': 's'
}),
('period', {
'type': float,
'default': 0.1,
'units': 's'
}),
]
w = ParamWidget(params)
return w
@Element(name='DC parameters')
def DC_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('DC height', {
'type': float,
'default': 0,
'units': 'V'
}),
('DC step size', {
'type': float,
'default': 0.1,
'units': 'V'
}),
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {
'type': int,
'default': 10
}),
('Measurement Time', {
'type': int,
'default': 10,
'units': 's'
}),
('File Name', {
'type': str
})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {
'type': int,
'default': 0
}),
('Stop Channel', {
'type': int,
'default': 1
}),
('Bin Count', {
'type': int,
'default': 1000
})
]
w = ParamWidget(params)
return w
@startpulse.initializer
def initialize(self):
self.wm.start_data()
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
@startpulse.finalizer
def finalize(self):
self.wm.stop_data()
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
class TwoPulsePhotonEcho(Spyrelet):
requires = {
'fungen': Keysight_33622A
# 'srs': SRS900
}
qutag = None
xs = np.array([])
ys = np.array([])
hist = []
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start, self.qutag.SIGNALCOND_MISC,
True, 1)
self.qutag.setSignalConditioning(stop, self.qutag.SIGNALCOND_MISC,
True, 0.1)
self.qutag.enableChannels((start, stop))
def createHistogram(self, stoparray, timebase, bincount, totalWidth, tau):
lowBound = 1.9 * tau
highBound = 2.1 * tau
hist = [0] * bincount
for stoptime in stoparray:
binNumber = int(stoptime * timebase * bincount / (totalWidth))
if binNumber >= bincount:
continue
print('error')
else:
hist[binNumber] += 1
out_name = "D:\\Data\\7.31.2019\\250mTSNSPD"
x = []
for i in range(bincount):
x.append(i * totalWidth / bincount)
np.savez(os.path.join(out_name, str(int(round(tau * 1e6, 0)))), hist,
x)
print('Data stored under File Name: ' + str(tau))
def createPlottingHist(self, stoparray, timebase, bincount, totalWidth):
for stoptime in stoparray:
binNumber = int(stoptime * timebase * bincount / (totalWidth))
if binNumber >= bincount:
continue
else:
self.hist[binNumber] += 1
def initHist(self, bincount):
self.hist = [0] * bincount
@Task()
def startpulse(self, timestep=1e-9):
params = self.pulse_parameters.widget.get()
tau = params['start tau']
period = params['period'].magnitude
repeat_unit = params['repeat unit'].magnitude
pulse_width = params['pulse width'].magnitude
buffer_time = params['buffer time'].magnitude
shutter_offset = params['shutter offset'].magnitude
wholeRange = params['measuring range'].magnitude
self.configureQutag()
for i in range(
int((params['stop tau'] - params['start tau']) /
params['step tau']) + 1):
xs = np.array([])
ys = np.array([])
hist = []
self.dataset.clear()
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
# self.srs.module_reset[5]
# self.srs.SIM928_voltage[5]=params['srs bias'].magnitude+0.000000001*i
# self.srs.SIM928_on[5]
## build pulse sequence for AWG channel 1
chn1buffer = Arbseq_Class('chn1buffer', timestep)
chn1buffer.delays = [0]
chn1buffer.heights = [0]
chn1buffer.widths = [repeat_unit]
chn1buffer.totaltime = repeat_unit
chn1buffer.nrepeats = buffer_time / repeat_unit
chn1buffer.repeatstring = 'repeat'
chn1buffer.markerstring = 'lowAtStart'
chn1buffer.markerloc = 0
chn1bufferwidth = repeat_unit * chn1buffer.nrepeats
chn1buffer.create_sequence()
chn1pulse = Arbseq_Class('chn1pulse', timestep)
chn1pulse.delays = [0]
chn1pulse.heights = [1]
chn1pulse.widths = [pulse_width]
chn1pulse.totaltime = pulse_width
chn1pulse.nrepeats = 0
chn1pulse.repeatstring = 'once'
chn1pulse.markerstring = 'highAtStartGoLow'
chn1pulse.markerloc = 0
chn1pulsewidth = pulse_width
chn1pulse.create_sequence()
chn1dc = Arbseq_Class('chn1dc', timestep)
chn1dc.delays = [0]
chn1dc.heights = [0]
chn1dc.widths = [repeat_unit]
chn1dc.totaltime = repeat_unit
chn1dc.repeatstring = 'repeat'
chn1dc.markerstring = 'lowAtStart'
chn1dc.markerloc = 0
chn1dcrepeats = int(
(tau.magnitude - 1.5 * pulse_width) / repeat_unit)
chn1dc.nrepeats = chn1dcrepeats
chn1dcwidth = repeat_unit * chn1dcrepeats
print(tau.magnitude, pulse_width, chn1dcrepeats)
chn1dc.create_sequence()
chn1pulse2 = Arbseq_Class('chn1pulse2', timestep)
chn1pulse2.delays = [0]
chn1pulse2.heights = [1]
chn1pulse2.widths = [pulse_width * 2]
chn1pulse2.totaltime = pulse_width * 2
chn1pulse2width = pulse_width * 2
chn1pulse2.nrepeats = 0
chn1pulse2.repeatstring = 'once'
chn1pulse2.markerstring = 'lowAtStart'
chn1pulse2.markerloc = 0
chn1pulse2.create_sequence()
chn1pulse3 = Arbseq_Class('chn1pulse3', timestep)
chn1pulse3.delays = [0]
chn1pulse3.heights = [0]
chn1pulse3.widths = [repeat_unit]
chn1pulse3.totaltime = repeat_unit
chn1pulse3width = shutter_offset
chn1pulse3.nrepeats = shutter_offset / repeat_unit
chn1pulse3.repeatstring = 'repeat'
chn1pulse3.markerstring = 'lowAtStart'
chn1pulse3.markerloc = 0
chn1pulse3.create_sequence()
chn1dc2 = Arbseq_Class('chn1dc2', timestep)
chn1dc2.delays = [0]
chn1dc2.heights = [0]
chn1dc2.widths = [repeat_unit]
chn1dc2.totaltime = repeat_unit
chn1dc2.repeatstring = 'repeat'
chn1dc2.markerstring = 'lowAtStart'
chn1dc2repeats = int(
(period - chn1bufferwidth - chn1pulsewidth - chn1dcwidth -
chn1pulse2width - chn1pulse3width) / repeat_unit)
chn1dc2.nrepeats = chn1dc2repeats
chn1dc2.markerloc = 0
#print((chn1dc2repeats*params['repeat unit'].magnitude) + tau.magnitude + params['pulse width'].magnitude)
print(params['repeat unit'].magnitude * chn1dc2.nrepeats)
chn1dc2.create_sequence()
## build pulse sequence for AWG channel 2
chn2buffer = Arbseq_Class('chn2buffer', timestep)
chn2buffer.delays = [0]
chn2buffer.heights = [1]
chn2buffer.widths = [repeat_unit]
chn2buffer.totaltime = repeat_unit
chn2buffer.nrepeats = buffer_time / repeat_unit
chn2buffer.repeatstring = 'repeat'
chn2buffer.markerstring = 'lowAtStart'
chn2buffer.markerloc = 0
chn2bufferwidth = repeat_unit * chn2buffer.nrepeats
chn2buffer.create_sequence()
chn2pulse1 = Arbseq_Class('chn2pulse1', timestep)
chn2pulse1.delays = [0]
chn2pulse1.heights = [1]
chn2pulse1.widths = [pulse_width]
chn2pulse1.totaltime = pulse_width
chn2pulse1width = pulse_width
chn2pulse1.nrepeats = 0
chn2pulse1.repeatstring = 'once'
chn2pulse1.markerstring = 'highAtStartGoLow'
chn2pulse1.markerloc = 0
chn2pulse1.create_sequence()
chn2dc1 = Arbseq_Class('chn2dc1', timestep)
chn2dc1.delays = [0]
chn2dc1.heights = [1]
chn2dc1.widths = [repeat_unit]
chn2dc1.totaltime = repeat_unit
chn2dc1.repeatstring = 'repeat'
chn2dc1.markerstring = 'lowAtStart'
chn2dc1.markerloc = 0
chn2dc1repeats = int(
(tau.magnitude - 1.5 * pulse_width) / repeat_unit)
chn2dc1.nrepeats = chn2dc1repeats
chn2dc1width = repeat_unit * chn2dc1repeats
chn2dc1.create_sequence()
chn2pulse2 = Arbseq_Class('chn2pulse2', timestep)
chn2pulse2.delays = [0]
chn2pulse2.heights = [1]
chn2pulse2.widths = [pulse_width * 2]
chn2pulse2.totaltime = pulse_width * 2
chn2pulse2width = pulse_width * 2
chn2pulse2.nrepeats = 0
chn2pulse2.repeatstring = 'once'
chn2pulse2.markerstring = 'lowAtStart'
chn2pulse2.markerloc = 0
chn2pulse2.create_sequence()
chn2pulse3 = Arbseq_Class('chn2pulse3', timestep)
chn2pulse3.delays = [0]
chn2pulse3.heights = [1]
chn2pulse3.widths = [repeat_unit]
chn2pulse3.totaltime = repeat_unit
chn2pulse3width = shutter_offset
chn2pulse3.nrepeats = shutter_offset / repeat_unit
chn2pulse3.repeatstring = 'repeat'
chn2pulse3.markerstring = 'lowAtStart'
chn2pulse3.markerloc = 0
chn2pulse3.create_sequence()
chn2dc2 = Arbseq_Class('chn2dc2', timestep)
chn2dc2.delays = [0]
chn2dc2.heights = [-1]
chn2dc2.widths = [repeat_unit]
chn2dc2.totaltime = repeat_unit
chn2dc2.repeatstring = 'repeat'
chn2dc2.markerstring = 'lowAtStart'
chn2dc2repeats = int(
(period - chn2bufferwidth - chn2pulse1width - chn2dc1width -
chn2pulse2width - chn2pulse3width) / repeat_unit)
chn2dc2.nrepeats = chn2dc2repeats
chn2dc2.markerloc = 0
print(repeat_unit * chn2dc2.nrepeats)
chn2dc2.create_sequence()
self.fungen.send_arb(chn1buffer, 1)
self.fungen.send_arb(chn1pulse, 1)
self.fungen.send_arb(chn1dc, 1)
self.fungen.send_arb(chn1pulse2, 1)
self.fungen.send_arb(chn1pulse3, 1)
self.fungen.send_arb(chn1dc2, 1)
self.fungen.send_arb(chn2buffer, 2)
self.fungen.send_arb(chn2pulse1, 2)
self.fungen.send_arb(chn2dc1, 2)
self.fungen.send_arb(chn2pulse2, 2)
self.fungen.send_arb(chn2pulse3, 2)
self.fungen.send_arb(chn2dc2, 2)
seq = [
chn1buffer, chn1pulse, chn1dc, chn1pulse2, chn1pulse3, chn1dc2
]
seq2 = [
chn2buffer, chn2pulse1, chn2dc1, chn2pulse2, chn2pulse3,
chn2dc2
]
self.fungen.create_arbseq('twoPulse', seq, 1)
self.fungen.create_arbseq('shutter', seq2, 2)
self.fungen.wait()
self.fungen.voltage[
1] = params['pulse height'].magnitude + 0.000000000001 * i
self.fungen.voltage[2] = 7.1 + 0.0000000000001 * i
print(self.fungen.voltage[1], self.fungen.voltage[2])
self.fungen.output[2] = 'ON'
self.fungen.trigger_delay(1, shutter_offset)
self.fungen.sync()
time.sleep(1)
self.fungen.output[1] = 'ON'
#self.fungen.output[2] = 'OFF'
##Qutag Part
self.configureQutag()
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
stoparray = []
tempStopArray = []
histCounter = 0
quenchCounter = 0
self.initHist(bincount)
for j in range(int(
self.exp_parameters.widget.get()['# of Passes'])):
lost = self.qutag.getLastTimestamps(True)
time.sleep(period)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
# print(values)
for k in range(values):
# output all stop events together with the latest start event
# if tchannel[k] == start:
# synctimestamp = tstamp[k]
if tchannel[k] == stop:
#stoptimestamp = tstamp[k]
# if tstamp[k]*1e-6>2*tau.magnitude-1 and tstamp[k]*1e-6<2*tau.magnitude+2:
stoparray.append(tstamp[k])
#tempStopArray.append(stoptimestamp)
# histCounter+=1
# if histCounter%20==0:
# self.createPlottingHist(tempStopArray, timebase, bincount,qutagparams['Total Hist Width Multiplier']*tau.magnitude)
# self.xs = np.asarray(range(len(self.hist)))
# self.ys=np.asarray(self.hist)
# values = {
# 't': np.asarray(range(len(self.hist))),
# 'y': np.asarray(self.hist),
# }
# self.startpulse.acquire(values)
# tempStopArray = []
# TODO: quench protection
# if self.srs.SIM928_voltage[???] >= qunech threshold and quenchCounter<=10:
# self.srs.SIM928_off[6]
# time.sleep(period*10)
# self.srs.SIM928_on[6]
# quenchCounter+=1
# elif quenchCounter>10:
# print('quenched more than 10 times')
# break
# else:
# continue
self.createHistogram(stoparray, timebase, bincount, wholeRange,
tau.magnitude)
tau += params['step tau']
#self.fungen.output[1] = 'OFF'
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {
'type': int,
'default': 0
}),
('Stop Channel', {
'type': int,
'default': 1
}),
('Total Hist Width Multiplier', {
'type': int,
'default': 5
}),
('Bin Count', {
'type': int,
'default': 1000
})
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of Passes', {
'type': int,
'default': 100
}),
# ('File Name', {'type': str})
]
w = ParamWidget(params)
return w
@Element(name='Histogram')
def averaged(self):
p = LinePlotWidget()
p.plot('Channel 1')
return p
@averaged.on(startpulse.acquired)
def averaged_update(self, ev):
w = ev.widget
xs = self.xs
ys = self.ys
w.set('Channel 1', xs=xs, ys=ys)
return
@Element(name='Pulse parameters')
def pulse_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('pulse height', {
'type': float,
'default': 3,
'units': 'V'
}),
('pulse width', {
'type': float,
'default': 300e-9,
'units': 's'
}),
('period', {
'type': float,
'default': 0.1,
'units': 's'
}),
('repeat unit', {
'type': float,
'default': 50e-9,
'units': 's'
}),
('start tau', {
'type': float,
'default': 3e-6,
'units': 's'
}),
('stop tau', {
'type': float,
'default': 10e-6,
'units': 's'
}),
('step tau', {
'type': float,
'default': 1e-6,
'units': 's'
}),
# ('srs bias', {'type': float, 'default': 1.2, 'units':'V'}),
('shutter offset', {
'type': float,
'default': 500e-9,
'units': 's'
}),
('measuring range', {
'type': float,
'default': 70e-6,
'units': 's'
}),
('buffer time', {
'type': float,
'default': 100e-6,
'units': 's'
}),
]
w = ParamWidget(params)
return w
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
@startpulse.initializer
def initialize(self):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
@startpulse.finalizer
def finalize(self):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
print('Two Pulse measurements complete.')
return
class HoleBurningSNSPD(Spyrelet):
requires = {
'fungen': Keysight_33622A
}
qutag = None
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start,self.qutag.SIGNALCOND_MISC,True,1)
self.qutag.setSignalConditioning(stop,self.qutag.SIGNALCOND_MISC,True,0.1)
self.qutag.enableChannels((start,stop))
def createHistogram(self,stoparray, timebase, bincount, period, index, wls):
hist = [0]*bincount
for stoptime in stoparray:
binNumber = int(stoptime*timebase*bincount/(period))
if binNumber >= bincount:
continue
else:
hist[binNumber]+=1
out_name = "D:\\Data\\8.2.2019\\thinfilm\\holeburning\\test"
np.savez(os.path.join(out_name,str(index)),hist,wls)
#np.savez(os.path.join(out_name,str(index+40)),hist,wls)
print('Data stored under File Name: ' + self.exp_parameters.widget.get()['File Name'] + str(index))
@Task()
def startpulse(self, timestep=1e-9):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
repeat_unit = 50e-9
buffer_time = 100e-6
pulse_width = 500e-9
period = 200e-3
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
params = self.pulse_parameters.widget.get()
chn1buffer = Arbseq_Class('chn1buffer', timestep)
chn1buffer.delays = [0]
chn1buffer.heights = [0]
chn1buffer.widths = [repeat_unit]
chn1buffer.totaltime = repeat_unit
chn1buffer.nrepeats = buffer_time/repeat_unit
chn1buffer.repeatstring = 'repeat'
chn1buffer.markerstring = 'lowAtStart'
chn1buffer.markerloc = 0
chn1bufferwidth = repeat_unit*chn1buffer.nrepeats
chn1buffer.create_sequence()
pulse = Arbseq_Class('pulse', timestep)
pulse.delays = [0]
pulse.heights = [0]
pulse.widths = [repeat_unit]
pulse.totaltime = repeat_unit
pulserepeat = 400000
pulse.nrepeats = pulserepeat
chn1pulsewidth=pulserepeat*repeat_unit
pulse.repeatstring = 'repeat'
pulse.markerstring = 'lowAtStart'
pulse.markerloc = 0
pulse.create_sequence()
chn1dc = Arbseq_Class('chn1dc', timestep)
chn1dc.delays = [0]
chn1dc.heights = [0]
chn1dc.widths = [repeat_unit]
chn1dc.totaltime = repeat_unit
chn1dc.repeatstring = 'repeat'
chn1dc.markerstring = 'lowAtStart'
chn1dc.markerloc = 0
chn1dcrepeats = 200000
chn1dc.nrepeats = chn1dcrepeats
chn1dcwidth = repeat_unit*chn1dcrepeats
chn1dc.create_sequence()
chn1pulse2 = Arbseq_Class('chn1pulse2', timestep)
chn1pulse2.delays = [0]
chn1pulse2.heights = [1]
chn1pulse2.widths = [pulse_width]
chn1pulse2.totaltime = pulse_width
chn1pulse2width = pulse_width
chn1pulse2.nrepeats = 0
chn1pulse2.repeatstring = 'once'
chn1pulse2.markerstring = 'highAtStartGoLow'
chn1pulse2.markerloc = 0
chn1pulse2.create_sequence()
# chn1pulse3 = Arbseq_Class('chn1pulse3', timestep)
# chn1pulse3.delays = [0]
# chn1pulse3.heights = [0]
# chn1pulse3.widths = [repeat_unit]
# chn1pulse3.totaltime = repeat_unit
# chn1pulse3width = shutter_offset
# chn1pulse3.nrepeats = shutter_offset/repeat_unit
# chn1pulse3.repeatstring = 'repeat'
# chn1pulse3.markerstring = 'lowAtStart'
# chn1pulse3.markerloc = 0
# chn1pulse3.create_sequence()
chn1dc2 = Arbseq_Class('chn1dc2', timestep)
chn1dc2.delays = [0]
chn1dc2.heights = [0]
chn1dc2.widths = [pulse_width]
chn1dc2.totaltime = pulse_width
chn1dc2.repeatstring = 'repeat'
chn1dc2.markerstring = 'lowAtStart'
chn1dc2repeats = 2e5
ch1dc2width=chn1dc2repeats*pulse_width
chn1dc2.nrepeats = chn1dc2repeats
chn1dc2.markerloc = 0
#print((chn1dc2repeats*params['repeat unit'].magnitude) + tau.magnitude + params['pulse width'].magnitude)
chn1dc2.create_sequence()
totalTime=chn1bufferwidth+chn1pulsewidth+chn1dcwidth+chn1pulse2width+ch1dc2width
chn2buffer = Arbseq_Class('chn2buffer', timestep)
chn2buffer.delays = [0]
chn2buffer.heights = [1]
chn2buffer.widths = [repeat_unit]
chn2buffer.totaltime = repeat_unit
chn2buffer.nrepeats = buffer_time/repeat_unit
chn2buffer.repeatstring = 'repeat'
chn2buffer.markerstring = 'lowAtStart'
chn2buffer.markerloc = 0
chn2bufferwidth = repeat_unit*chn2buffer.nrepeats
chn2buffer.create_sequence()
chn2pulse1 = Arbseq_Class('chn2pulse1', timestep)
chn2pulse1.delays = [0]
chn2pulse1.heights = [1]
chn2pulse1.widths = [repeat_unit]
chn2pulse1.totaltime = repeat_unit
chn2pulse1.nrepeats = pulserepeat
chn2pulse1width = pulse_width
chn2pulse1.repeatstring = 'repeat'
chn2pulse1.markerstring = 'lowAtStart'
chn2pulse1.markerloc = 0
chn2pulse1.create_sequence()
chn2dc1 = Arbseq_Class('chn2dc1', timestep)
chn2dc1.delays = [0]
chn2dc1.heights = [1]
chn2dc1.widths = [repeat_unit]
chn2dc1.totaltime = repeat_unit
chn2dc1.repeatstring = 'repeat'
chn2dc1.markerstring = 'lowAtStart'
chn2dc1.markerloc = 0
chn2dc1repeats = chn1dcrepeats
chn2dc1.nrepeats = chn1dcrepeats
chn2dc1width = repeat_unit*chn2dc1repeats
chn2dc1.create_sequence()
chn2pulse2 = Arbseq_Class('chn2pulse2', timestep)
chn2pulse2.delays = [0]
chn2pulse2.heights = [-1]
chn2pulse2.widths = [pulse_width]
chn2pulse2.totaltime = pulse_width
chn2pulse2width = pulse_width
chn2pulse2.nrepeats = 0
chn2pulse2.repeatstring = 'once'
chn2pulse2.markerstring = 'highAtStartGoLow'
chn2pulse2.markerloc = 0
chn2pulse2.create_sequence()
chn2dc2 = Arbseq_Class('chn2dc2', timestep)
chn2dc2.delays = [0]
chn2dc2.heights = [-1]
chn2dc2.widths = [pulse_width]
chn2dc2.totaltime = pulse_width
chn2dc2.repeatstring = 'repeat'
chn2dc2.markerstring = 'lowAtStart'
chn2dc2repeats = chn1dc2repeats
chn2dc2.nrepeats = chn2dc2repeats
chn2dc2.markerloc = 0
chn2dc2.create_sequence()
self.fungen.send_arb(chn1buffer, 1)
self.fungen.send_arb(pulse, 1)
self.fungen.send_arb(chn1dc, 1)
self.fungen.send_arb(chn1pulse2, 1)
self.fungen.send_arb(chn1dc2, 1)
self.fungen.send_arb(chn2buffer, 2)
self.fungen.send_arb(chn2pulse1, 2)
self.fungen.send_arb(chn2dc1, 2)
self.fungen.send_arb(chn2pulse2, 2)
self.fungen.send_arb(chn2dc2, 2)
seq = [chn1buffer, pulse, chn1dc, chn1pulse2, chn1dc2]
seq2=[chn2buffer,chn2pulse1,chn2dc1,chn2pulse2,chn2dc2]
self.fungen.create_arbseq('pulsetest', seq2, 2)
self.fungen.wait()
self.fungen.voltage[2] = 7.1
self.fungen.output[2] = 'ON'
#self.fungen.sync()
self.fungen.create_arbseq('pulsetest', seq, 1)
self.fungen.wait()
self.fungen.voltage[1] = params['pulse height']
self.fungen.sync()
self.fungen.output[1] = 'ON'
#time.sleep(100000)
self.configureQutag()
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
expparams = self.exp_parameters.widget.get()
for i in range(expparams['# of points']):
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls=[]
lost = self.qutag.getLastTimestamps(True)
while time.time()-startTime < expparams['Measurement Time'].magnitude:
lost = self.qutag.getLastTimestamps(True)
time.sleep(30*totalTime)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
self.createHistogram(stoparray, timebase, bincount, totalTime,i, wls)
print(i)
#self.fungen.voltage[2] = self.fungen.voltage[2].magnitude + 2*dcparams['DC step size'].magnitude
self.fungen.output[1] = 'OFF'
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Pulse parameters')
def pulse_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('pulse height', {'type': float, 'default': 3, 'units':'V'}),
('pulse width', {'type': float, 'default': 500e-9, 'units':'s'}),
('period', {'type': float, 'default': 0.1, 'units':'s'}),
]
w = ParamWidget(params)
return w
@Element(name='DC parameters')
def DC_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('DC height', {'type': float, 'default': 0, 'units':'V'}),
('DC step size', {'type': float, 'default': 0.1, 'units':'V'}),
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {'type': int, 'default': 10}),
('Measurement Time', {'type': int, 'default': 10, 'units':'s'}),
('File Name', {'type': str})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {'type': int, 'default': 0}),
('Stop Channel', {'type': int, 'default': 1}),
('Bin Count', {'type': int, 'default': 1000})
]
w = ParamWidget(params)
return w
@startpulse.initializer
def initialize(self):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
@startpulse.finalizer
def finalize(self):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
class PLThinFilm(Spyrelet):
requires = {
'wm': Bristol_771,
'fungen': Keysight_33622A,
'SRS': SRS900
}
qutag = None
laser = NetworkConnection('1.1.1.2')
xs=np.array([])
ys=np.array([])
hist=[]
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start,self.qutag.SIGNALCOND_MISC,True,1)
self.qutag.setSignalConditioning(stop,self.qutag.SIGNALCOND_MISC,True,0.1)
self.qutag.enableChannels((start,stop))
def homelaser(self,start):
current=self.wm.measure_wavelength()
with Client(self.laser) as client:
while current<start-0.001 or current>start+0.001:
setting=client.get('laser1:ctl:wavelength-set', float)
offset=current-start
client.set('laser1:ctl:wavelength-set', setting-offset)
time.sleep(3)
current=self.wm.measure_wavelength()
print(current, start)
def createHistogram(self,stoparray, timebase, bincount, period, index, wls,out_name,extra_data=False):
print('creating histogram')
hist = [0]*bincount
for stoptime in stoparray:
# stoptime=ps
# timebase = converts to seconds
# bincount: # of bins specified by user
# period: measurement time specified by user
binNumber = int(stoptime*timebase*bincount/(period))
if binNumber >= bincount:
continue
print('error')
else:
hist[binNumber]+=1
if extra_data==False:
np.savez(os.path.join(out_name,str(index)),hist,wls)
if extra_data!=False:
np.savez(os.path.join(out_name,str(index)),hist,wls,extra_data)
#np.savez(os.path.join(out_name,str(index+40)),hist,wls)
print('Data stored under File Name: ' + out_name +'\\'+str(index)+'.npz')
def resetTargets(self,targets,totalShift,i,channel):
print('AWG limit exceeded, resetting voltage targets')
# get the current wavelength
current=self.wm.measure_wavelength()
# adjust all targets to be lower again
# reset totalShift
print('totalShift: '+str(totalShift))
newTargets=[j-totalShift for j in targets]
print('newTargets')
voltageTargets=newTargets
totalShift=0
# bring voltage back to ideal
self.fungen.offset[channel]=Q_(voltageTargets[i-1],'V')
# drive to last wavelength again
self.homelaser(current)
wl=self.wm.measure_wavelength()
return voltageTargets,totalShift,wl
def reset_quench(self):
"""
A typical quench shows the voltage exceeding 2mV.
"""
qutagparams = self.qutag_params.widget.get()
# vm1=qutagparams['Voltmeter Channel 1']
vm2=qutagparams['Voltmeter Channel 2']
# vs1=qutagparams['Battery Port 1']
vs2=qutagparams['Battery Port 2']
# self.SRS.clear_status()
# V1=self.SRS.SIM970_voltage[vm1].magnitude
self.SRS.clear_status()
V2=self.SRS.SIM970_voltage[vm2].magnitude
quenchfix='YES'
# i=0
# while (float(V1)>=0.010):
# i+=1
# print('Voltage 1 higher than 10mV, resetting')
# self.SRS.SIM928_on_off[vs1]='OFF'
# self.SRS.SIM928_on_off[vs2]='OFF'
# self.SRS.SIM928_on_off[vs1]='ON'
# self.SRS.SIM928_on_off[vs2]='ON'
# print('checking Voltage 1 again')
# self.SRS.clear_status()
# time.sleep(1)
# V1=self.SRS.SIM970_voltage[vm1].magnitude
# print('Voltage 1: '+str(V1)+'V')
# if i>10:
# self.fungen.output[1]='OFF'
# self.fungen.output[2]='OFF'
# quenchfix='NO'
# break
i=0
while (float(V2)>=0.010):
i+=1
print('Voltage 2 higher than 10mV, resetting')
self.SRS.SIM928_on_off[vs1]='OFF'
self.SRS.SIM928_on_off[vs2]='OFF'
self.SRS.SIM928_on_off[vs1]='ON'
self.SRS.SIM928_on_off[vs2]='ON'
print('checking Voltage 2 again')
self.SRS.clear_status()
time.sleep(1)
V2=self.SRS.SIM970_voltage[vm2].magnitude
print('Voltage 2: '+str(V2)+'V')
if i>10:
self.fungen.output[1]='OFF'
self.fungen.output[2]='OFF'
quenchfix='NO'
break
return quenchfix
@Task()
def piezo_scan(self,timestep=100e-9):
#self.fungen.output[1]='ON'
piezo_params=self.piezo_parameters.widget.get()
Vstart=piezo_params['voltage start']
Vstop=piezo_params['voltage end']
pts=piezo_params['scan points']
voltageTargets=np.linspace(Vstart,Vstop,pts)
reversedTargets=voltageTargets[::-1]
voltageTargets=reversedTargets
print('voltageTargets: '+str(voltageTargets))
channel=piezo_params['AWG channel']
# turn off AWG
self.fungen.output[channel]='OFF'
##Qutag Part
self.configureQutag()
expparams = self.exp_parameters.widget.get()
wlparams = self.wl_parameters.widget.get()
# drive to the offset estimated by the piezo voltage
# 1MOhm impedance of laser mismatch with 50Ohm impedance of AWG
# multiplies voltage 2x
# 140V ~ 40GHz ~ 315pm
piezo_range=(Vstop.magnitude-Vstart.magnitude)*0.315/(140)*piezo_params['Scale factor'] #pm
print('piezo_range: '+str(piezo_range)+str(' nm'))
wl_start=wlparams['start']-piezo_range
wl_stop=wlparams['stop']+piezo_range
wlpts=np.linspace(wl_start,wl_stop,pts)
self.homelaser(wlparams['start']-piezo_range)
print('Laser Homed!')
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
PATH="C:\\Data\\"+self.exp_parameters.widget.get()['File Name']
if PATH!="C:\\Data\\":
if (os.path.exists(PATH)):
print('deleting old directory with same name')
os.system('rm -rf '+str(PATH))
print('making new directory')
Path(PATH).mkdir(parents=True, exist_ok=True)
else:
print("Specify a foldername & rerun task.")
print("Task will error trying to saving data.")
# turn on AWG
self.fungen.output[channel]='ON'
last_wl=self.wm.measure_wavelength()
wls=[]
totalShift=0
for i in range(pts):
print(i)
if (voltageTargets[i]>5) or (voltageTargets[i]<-5):
newTargets,newShift,wl=self.resetTargets(voltageTargets,totalShift,i,channel)
voltageTargets=newTargets
totalShift=newShift
self.fungen.offset[channel]=Q_(voltageTargets[i],'V')
wl=self.wm.measure_wavelength()
counter=0
if len(wls)!=0:
last_wl=np.mean(np.array(wls).astype(np.float))
print('i: '+str(i)+', initializing')
while ((wl<wlpts[i]-0.0002) or (wl>wlpts[i]+0.0002)):
offset=wl-wlpts[i]
Voff=offset/0.315*140/(piezo_params['Scale factor']*2)
if offset<0:
if voltageTargets[i]+Voff<-5:
newTargets,newShift,wl=self.resetTargets(voltageTargets,totalShift,i,channel)
voltageTargets=newTargets
totalShift=newShift
print('AWG limit exceeded, resetting voltage targets')
else:
newTargets=[j+Voff for j in voltageTargets]
voltageTargets=newTargets
self.fungen.offset[channel]=Q_(newTargets[i],'V')
time.sleep(3)
wl=self.wm.measure_wavelength()
counter+=Voff
totalShift+=Voff
else:
if voltageTargets[i]+Voff>5:
newTargets,newShift,wl=self.resetTargets(voltageTargets,totalShift,i,channel)
voltageTargets=newTargets
totalShift=newShift
print('AWG limit exceeded, resetting voltage targets')
else:
newTargets=[j+Voff for j in voltageTargets]
voltageTargets=newTargets
self.fungen.offset[channel]=Q_(newTargets[i],'V')
time.sleep(3)
wl=self.wm.measure_wavelength()
counter+=Voff
totalShift+=Voff
print('taking data')
print('current target wavelength: '+str(wlpts[i]))
print('current set voltage: '+str(voltageTargets[i]))
print('actual wavelength: '+str(self.wm.measure_wavelength()))
time.sleep(1)
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls=[]
lost = self.qutag.getLastTimestamps(True)
counter2=0
looptime=startTime
while looptime-startTime < expparams['Measurement Time'].magnitude:
loopstart=time.time()
# get the lost timestamps
lost = self.qutag.getLastTimestamps(True)
# wait half a milisecond
time.sleep(5*0.1)
# get thte timestamps in the last half milisecond
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
wl=self.wm.measure_wavelength()
wls.append(str(wl))
looptime+=time.time()-loopstart
#print('i: '+str(i)+', looptime-startTime: '+str(looptime-startTime))
quenchfix=self.reset_quench()
if quenchfix!='YES':
print('SNSPD quenched and could not be reset')
self.fungen.output[1]='OFF'
self.fungen.output[2]='OFF'
endloop
while ((wl<wlpts[i]-0.0002) or (wl>wlpts[i]+0.0002)) and (time.time()-startTime < expparams['Measurement Time'].magnitude):
offset=wl-wlpts[i]
Voff=offset/0.315*140/(piezo_params['Scale factor']*2)
if offset<0:
if voltageTargets[i]+Voff<-5:
break
else:
newTargets=[j+Voff for j in voltageTargets]
voltageTargets=newTargets
self.fungen.offset[channel]=Q_(newTargets[i],'V')
time.sleep(3)
wl=self.wm.measure_wavelength()
counter2+=Voff
totalShift+=Voff
else:
if voltageTargets[i]+Voff>5:
break
else:
newTargets=[j+Voff for j in voltageTargets]
voltageTargets=newTargets
self.fungen.offset[channel]=Q_(newTargets[i],'V')
time.sleep(3)
wl=self.wm.measure_wavelength()
counter2+=Voff
totalShift+=Voff
print('actual wavelength: '+str(wl))
print('targets shift during measurement: '+str(counter2)+'V')
self.createHistogram(stoparray, timebase, bincount,
expparams['AWG Pulse Repetition Period'].magnitude,i, wls,
"C:\\Data\\"+self.exp_parameters.widget.get()['File Name'])
# turn off AWG
self.fungen.output[channel]='OFF'
@Task()
def startpulse(self, timestep=100e-9):
self.fungen.output[1]='OFF'
#self.fungen.output[2]='OFF'
self.SRS.SIMmodule_on[6] ##Turn on the power supply of the SNSPD
time.sleep(3) ##wait 1s to turn on the SNSPD
##Qutag Part
self.configureQutag()
expparams = self.exp_parameters.widget.get()
wlparams = self.wl_parameters.widget.get()
self.homelaser(wlparams['start'])
print('Laser Homed!')
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
self.fungen.frequency[1]=expparams['AWG Pulse Frequency']
self.fungen.voltage[1]=3.5
self.fungen.offset[1]=1.75
self.fungen.phase[1]=0
self.fungen.pulse_width[1]=expparams['AWG Pulse Width']
self.fungen.waveform[1]='PULS'
self.fungen.output[1]='ON'
#PATH="C:\\Data\\12.18.2020_ffpc\\"+self.exp_parameters.widget.get()['File Name']+"\\motor_scan"
PATH="Q:\\Data\\5.28.2021_ffpc\\"+self.exp_parameters.widget.get()['File Name']
print('here')
print('PATH: '+str(PATH))
if PATH!="Q:\\Data\\5.28.2021_ffpc\\":
if (os.path.exists(PATH)):
print('deleting old directory with same name')
os.system('rm -rf '+str(PATH))
print('making new directory')
Path(PATH).mkdir(parents=True, exist_ok=True)
#os.mkdir(PATH)
else:
print("Specify a foldername & rerun task.")
print("Task will error trying to saving data.")
wlTargets=np.linspace(wlparams['start'],wlparams['stop'],expparams['# of points'])
print('wlTargets: '+str(wlTargets))
for i in range(expparams['# of points']):
print(i)
with Client(self.laser) as client:
setting=client.get('laser1:ctl:wavelength-set', float)
client.set('laser1:ctl:wavelength-set', wlTargets[i])
wl=self.wm.measure_wavelength()
while ((wl<wlTargets[i]-0.001) or (wl>wlTargets[i]+0.001)):
print('correcting for laser drift')
self.homelaser(wlTargets[i])
wl=self.wm.measure_wavelength()
print('current target wavelength: '+str(wlTargets[i]))
print('actual wavelength: '+str(self.wm.measure_wavelength()))
time.sleep(1)
print('taking data')
print('current target wavelength: '+str(wlTargets[i]))
print('actual wavelength: '+str(self.wm.measure_wavelength()))
time.sleep(1)
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls=[]
lost = self.qutag.getLastTimestamps(True)
#counter2=0
looptime=startTime
while looptime-startTime < expparams['Measurement Time'].magnitude:
loopstart=time.time()
# get the lost timestamps
lost = self.qutag.getLastTimestamps(True)
# wait half a milisecond
time.sleep(5*0.1) #
# get thte timestamps in the last half milisecond
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
wl=self.wm.measure_wavelength()
wls.append(str(wl))
looptime+=time.time()-loopstart
print('i: '+str(i)+', looptime-startTime: '+str(looptime-startTime))
# quenchfix=self.reset_quench()
# if quenchfix!='YES':
# print('SNSPD quenched and could not be reset')
# # self.fungen.output[1]='OFF'
# self.fungen.output[2]='OFF'
# endloop
while ((wl<wlTargets[i]-0.001) or (wl>wlTargets[i]+0.001)) and (time.time()-startTime < expparams['Measurement Time'].magnitude):
print('correcting for laser drift')
self.homelaser(wlTargets[i])
wl=self.wm.measure_wavelength()
print('actual wavelength: '+str(wl))
#print('I am here')
self.createHistogram(stoparray, timebase, bincount, expparams['AWG Pulse Repetition Period'].magnitude,str(i), wls,PATH)
# self.createHistogram(stoparray, timebase, bincount,period,str(i),
# wls,PATH,savefreqs)
self.fungen.output[1]='OFF'
self.SRS.SIMmodule_off[6] ##turn off the SNSPD power suppy after the measurement
#@Task()
#def spectralDiffusion_wRFsource(self):
""" Task to measure spectral diffusion on timescales < T1. Assumes that
1 channel of the keysight AWG is sending a sine wave to an EOM. The
amplitude of the RF drive for the EOM is set such that the sidebands
have an equal amplitude to the pump beam. This tasks sweeps the
frequency of the sine wave (separation of the EOM sidebands) while
collecting PL, which can be used to determine the spectral diffusion
linewidth since the saturation of the ions will be determined by how
much the sidebands overlap with the spectral diffusion lineshape.
This task is good for modulating between 1MHz and 200MHz.
JDSU EOM amplifier has nonlinear performance below 1MHz (amplification
increases), but the N5181A works down to 100kHz if desired.
"""
# get the parameters for the experiment from the widget
"""
SD_wRFparams=self.SD_wRFparams.widget.get()
startFreq=SD_wRFparams['Start frequency']
stopFreq=SD_wRFparams['Stop frequency']
power=SD_wRFparams['RF Power']
runtime=SD_wRFparams['Runtime']
wl=SD_wRFparams['Wavelength']
points=SD_wRFparams['# of points']
period=SD_wRFparams['Period']
foldername=self.SD_wRFparams.widget.get()['File Name']
# convert the period & runtime to floats
period=period.magnitude
runtime=runtime.magnitude
# set the amplitude of the RF signal
self.source.set_RF_Power(power)
# home the laser
self.configureQutag()
self.homelaser(wl)
print('Laser Homed!')
##Qutag Part
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
PATH="D:\\Data\\"+foldername
if PATH!="D:\\Data\\":
if (os.path.exists(PATH)):
print('deleting old directory with same name')
os.system('rm -rf '+str(PATH))
print('making new directory')
Path(PATH).mkdir(parents=True, exist_ok=True)
# make a vector containing all the frequency setpoints for the EOM
freqs=np.linspace(startFreq,stopFreq,points)
# now loop through all the set frequencies of the EOM modulation
# and record the PL on the qutag
# turn on the RF source & set it in CW mode
self.source.FM_ON()
self.source.set_CW_mode()
for i in range(points):
#set the frequency on the RF source
self.source.set_CW_Freq(freqs[i])
# want to actively stabilize the laser frequency since it can
# drift on the MHz scale
with Client(self.laser) as client:
setting=client.get('laser1:ctl:wavelength-set', float)
client.set('laser1:ctl:wavelength-set', wl)
currentwl=self.wm.measure_wavelength()
while ((currentwl<wl-0.001) or (currentwl>wl+0.001)):
print('correcting for laser drift')
self.homelaser(wl)
currentwl=self.wm.measure_wavelength()
print('current target wavelength: '+str(wl))
print('actual wavelength: '+str(currentwl))
time.sleep(1)
print('taking data')
print('current frequency: '+str(freqs[i]))
print('current target wavelength: '+str(wl))
print('actual wavelength: '+str(self.wm.measure_wavelength()))
time.sleep(1)
stoparray = []
startTime = time.time()
wls=[]
savefreqs=[]
lost = self.qutag.getLastTimestamps(True)
looptime=startTime
while looptime-startTime < runtime:
loopstart=time.time()
# get the lost timestamps
lost = self.qutag.getLastTimestamps(True)
# wait half a milisecond
time.sleep(5*0.1)
# get thte timestamps in the last half milisecond
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
currentwl=self.wm.measure_wavelength()
wls.append(str(currentwl))
savefreqs.append(float(freqs[i]))
looptime+=time.time()-loopstart
while ((currentwl<wl-0.001) or (currentwl>wl+0.001)) and (time.time()-startTime < runtime):
print('correcting for laser drift')
self.homelaser(wl)
currentwl=self.wm.measure_wavelength()
print('actual wavelength: '+str(currentwl))
self.createHistogram(stoparray, timebase, bincount,period,str(i),
wls,PATH,savefreqs)
# turnn off the RF output of the N5181A whenn done
self.source.RF_OFF()
"""
@Task()
def spectralDiffusion_wAWG(self):
""" Task to measure spectral diffusion on timescales < T1. Uses the
Agilent N5181A RF source to send a sine wave to the phase EOM. The
amplitude of the RF drive for the EOM is set such that the sidebands
have an equal amplitude to the pump beam (Calibrated on 11/19/20 to
be 6Vpp for the JDSU phase EOM). This tasks sweeps the
frequency of the sine wave (separation of the EOM sidebands) while
collecting PL, which can be used to determine the spectral diffusion
linewidth since the saturation of the ions will be determined by how
much the sidebands overlap with the spectral diffusion lineshape.
The Keysight AWG only works up to 80MHz.
Could potentially modify code to use Siglent AWG which can go up to 120MHz
"""
self.fungen.output[1]='OFF'
self.fungen.output[2]='OFF'
# some initialization of the function generator
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
#self.fungen.output[1]='ON'
self.SRS.SIMmodule_on[6] ##Turn on the power supply of the SNSPD
time.sleep(1) ##wait 1s to turn on the SNSPD
# get the parameters for the experiment from the widget
SD_wAWGparams=self.SD_wAWGparams.widget.get()
startFreq=SD_wAWGparams['Start frequency']
stopFreq=SD_wAWGparams['Stop frequency']
EOMvoltage=SD_wAWGparams['EOM voltage']
runtime=SD_wAWGparams['Runtime']
EOMchannel=SD_wAWGparams['EOM channel']
Pulsechannel=SD_wAWGparams['Pulse channel']
Pulsefreq=SD_wAWGparams['Pulse Frequency']
Pulsewidth=SD_wAWGparams['Pulse Width']
period=SD_wAWGparams['Pulse Repetition Period']
wl=SD_wAWGparams['Wavelength']
points=SD_wAWGparams['# of points']
foldername=SD_wAWGparams['File Name']
# convert the period & runtime to floats
period=period.magnitude
runtime=runtime.magnitude
self.fungen.clear_mem(EOMchannel)
self.fungen.clear_mem(Pulsechannel)
self.fungen.waveform[Pulsechannel]='PULS'
self.fungen.waveform[EOMchannel]='SIN'
# set the sine wave driving the EOM on the other channel
self.fungen.waveform[EOMchannel]='SIN'
self.fungen.voltage[EOMchannel]=EOMvoltage
self.fungen.offset[EOMchannel]=0
self.fungen.phase[EOMchannel]=0
self.fungen.waveform[Pulsechannel]='PULS'
self.fungen.frequency[Pulsechannel]=Pulsefreq
self.fungen.voltage[Pulsechannel]=3.5
self.fungen.offset[Pulsechannel]=1.75
self.fungen.phase[Pulsechannel]=0
self.fungen.pulse_width[Pulsechannel]=Pulsewidth
self.fungen.output[EOMchannel]='ON'
self.fungen.output[Pulsechannel]='ON'
# home the laser
self.configureQutag()
self.homelaser(wl)
print('Laser Homed!')
##Qutag Part
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
PATH="C:\\Data\\12.29.2020_ffpc\\SD0.1mW20dBatt195227GHz\\"+str(foldername)
print('PATH: '+str(PATH))
if PATH!="C:\\Data\\12.29.2020_ffpc\\SD0.1mW20dBatt195227GHz\\":
if (os.path.exists(PATH)):
print('deleting old directory with same name')
os.system('rm -rf '+str(PATH))
print('PATH: '+str(PATH))
print('making new directory')
Path(PATH).mkdir(parents=True, exist_ok=True)
else:
print("Specify a foldername & rerun task.")
print("Task will error trying to saving data.")
# make a vector containing all the frequency setpoints for the EOM
freqs=np.linspace(startFreq,stopFreq,points)
# now loop through all the set frequencies of the EOM modulation
# and record the PL on the qutag
for i in range(points):
self.fungen.frequency[EOMchannel]=freqs[i]
# want to actively stabilize the laser frequency since it can
# drift on the MHz scale
with Client(self.laser) as client:
setting=client.get('laser1:ctl:wavelength-set', float)
client.set('laser1:ctl:wavelength-set', wl)
currentwl=self.wm.measure_wavelength()
while ((currentwl<wl-0.001) or (currentwl>wl+0.001)):
print('correcting for laser drift')
self.homelaser(wl)
currentwl=self.wm.measure_wavelength()
print('current target wavelength: '+str(wl))
print('actual wavelength: '+str(currentwl))
time.sleep(1)
print('taking data')
print('current frequency: '+str(freqs[i]))
print('current target wavelength: '+str(wl))
print('actual wavelength: '+str(self.wm.measure_wavelength()))
time.sleep(1)
stoparray = []
startTime = time.time()
wls=[]
savefreqs=[]
lost = self.qutag.getLastTimestamps(True)
looptime=startTime
while looptime-startTime < runtime:
loopstart=time.time()
# get the lost timestamps
lost = self.qutag.getLastTimestamps(True)
# wait half a milisecond
time.sleep(5*0.1)
# get thte timestamps in the last half milisecond
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
currentwl=self.wm.measure_wavelength()
wls.append(str(currentwl))
savefreqs.append(float(freqs[i]))
looptime+=time.time()-loopstart
# quenchfix=self.reset_quench()
# if quenchfix!='YES':
# print('SNSPD quenched and could not be reset')
# self.fungen.output[1]='OFF'
# self.fungen.output[2]='OFF'
# endloop
while ((currentwl<wl-0.001) or (currentwl>wl+0.001)) and (time.time()-startTime < runtime):
print('correcting for laser drift')
self.homelaser(wl)
currentwl=self.wm.measure_wavelength()
print('actual wavelength: '+str(currentwl))
self.createHistogram(stoparray, timebase, bincount,period,str(i),wls,PATH,savefreqs)
self.fungen.output[EOMchannel]='OFF' ##turn off the AWG for both channels
self.fungen.output[Pulsechannel]='OFF'
self.SRS.SIMmodule_off[6] ##turn off the SNSPD power suppy after the measurement
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Wavelength parameters')
def wl_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
# ('start', {'type': float, 'default': 1535.665}),
('start', {'type': float, 'default': 1535.527}),
('stop', {'type': float, 'default': 1535.685})
# ('stop', {'type': float, 'default': 1535.61})
]
w = ParamWidget(params)
return w
@Element(name='Piezo scan parameters')
def piezo_parameters(self):
params=[
('voltage start',{'type': float,'default':-3,'units':'V'}),
('voltage end',{'type': float,'default':3,'units':'V'}),
('scan points',{'type':int,'default':100}),
('AWG channel',{'type':int,'default':0}),
('Scale factor',{'type':float,'default':2})
]
w=ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {'type': int, 'default': 40}),
('Measurement Time', {'type': int, 'default': 180, 'units':'s'}),
('File Name', {'type': str}),
('AWG Pulse Repetition Period',{'type': float,'default': 2e-3,'units':'s'}),
('AWG Pulse Frequency',{'type': int,'default': 500,'units':'Hz'}),
('AWG Pulse Width',{'type': float,'default': 300e-9,'units':'s'}),
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {'type': int, 'default': 0}),
('Stop Channel', {'type': int, 'default': 2}),
('Bin Count', {'type': int, 'default': 1000}),
# ('Voltmeter Channel 1',{'type':int,'default':1}),
('Voltmeter Channel 2',{'type':int,'default':2}),
# ('Battery Port 1',{'type':int,'default':5}),
('Battery Port 2',{'type':int,'default':6})
]
w = ParamWidget(params)
return w
@Element(name='Spectral diffusion experiment parameters')
def SD_wAWGparams(self):
""" Widget containing the parameters used in the spectral diffusion
experiment.
Default EOM voltage calibrated by Christina and Yizhong on 11/19/20.
(rough estimate for equal amplitude sidebands)
"""
params=[
('Start frequency',{'type':float,'default':3.1e6,'units':'Hz'}),
('Stop frequency',{'type':float,'default':3.3e6,'units':'Hz'}),
('EOM voltage',{'type':float,'default':6,'units':'V'}),
('Runtime',{'type':float,'default':300,'units':'s'}),
('EOM channel',{'type':int,'default':1}),
('Pulse channel',{'type':int,'default':2}),
('Pulse Repetition Period',{'type': float,'default': 0.001,'units':'s'}),
('Pulse Frequency',{'type': int,'default': 1000,'units':'Hz'}),
('Pulse Width',{'type': float,'default': 500e-9,'units':'s'}),
('Wavelength',{'type':float,'default':1535.61}),
('# of points',{'type':int,'default':2}),
('File Name',{'type':str}),
]
w=ParamWidget(params)
return w
#@Element(name='Spectral diffusion experiment parameters')
#def SD_wRFparams(self):
""" Widget containing the parameters used in the spectral diffusion
experiment.
Default EOM voltage calibrated by Christina and Yizhong on 11/19/20.
(rough estimate for equal amplitude sidebands)
"""
"""
params=[
('Start frequency',{'type':float,'default':5e6,'units':'Hz'}),
('Stop frequency',{'type':float,'default':200e6,'units':'Hz'}),
('RF Power',{'type':float,'default':-1.30,'units':'dBm'}),
('Runtime',{'type':float,'default':10,'units':'s'}),
('Wavelength',{'type':float,'default':1536.480}),
('Period',{'type':float,'default':100e-3,'units':'s'}),
('# of points',{'type':int,'default':40}),
('File Name',{'type':str}),
]
w=ParamWidget(params)
return w
"""
@startpulse.initializer
def initialize(self):
self.wm.start_data()
@startpulse.finalizer
def finalize(self):
self.wm.stop_data()
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
print('devType: '+str(devType))
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
class Rabi2(Spyrelet):
requires = {'fungen': Keysight_33622A}
qutag = None
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start, self.qutag.SIGNALCOND_MISC,
True, 1)
self.qutag.setSignalConditioning(stop, self.qutag.SIGNALCOND_MISC,
True, 0.1)
self.qutag.enableChannels((start, stop))
def createHistogram(self, stoparray, timebase, bincount, period, index):
hist = [0] * bincount
for stoptime in stoparray:
binNumber = int(stoptime * timebase * bincount / (period))
if binNumber >= bincount:
continue
else:
hist[binNumber] += 1
out_name = "D:\\Data\\5.27.2019\\Rabi2\\Round5"
np.savez(os.path.join(out_name, str(index * 50 + 200)), hist)
print('Data stored under File Name: ' +
self.exp_parameters.widget.get()['File Name'] + str(index))
def makePulse(self, pulse_width, i):
timestep = 1e-9
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
params = self.pulse_parameters.widget.get()
period = params['period'].magnitude
repeat_unit = 50e-9
buffer1 = Arbseq_Class('buffer1', timestep)
buffer1.delays = [0]
buffer1.heights = [0]
buffer1.widths = [pulse_width]
buffer1.totaltime = pulse_width
buffer1.nrepeats = 0
buffer1.repeatstring = 'once'
buffer1.markerstring = 'highAtStartGoLow'
buffer1.markerloc = 0
buffer1.create_sequence()
pulse = Arbseq_Class('pulse', timestep)
pulse.delays = [0]
pulse.heights = [1]
pulse.widths = [pulse_width]
pulse.totaltime = pulse_width
pulse.nrepeats = 0
pulse.repeatstring = 'once'
pulse.markerstring = 'lowAtStart'
pulse.markerloc = 0
pulse.create_sequence()
offset1 = Arbseq_Class('offset1', timestep)
offset1.delays = [0]
offset1.heights = [0]
offset1.widths = [pulse_width]
offset1.totaltime = pulse_width
offset1.nrepeats = 0
offset1.repeatstring = 'once'
offset1.markerstring = 'lowAtStart'
offset1.markerloc = 0
offset1.create_sequence()
dc = Arbseq_Class('dc', timestep)
dc.delays = [0]
dc.heights = [0]
dc.widths = [params['pulse width'].magnitude]
dc.totaltime = params['pulse width'].magnitude
dc.repeatstring = 'repeat'
dc.markerstring = 'lowAtStart'
dc.markerloc = 0
width = params['pulse width'].magnitude
repeats = period / width - 3
dc.nrepeats = repeats
dc.create_sequence()
buffer2 = Arbseq_Class('buffer2', timestep)
buffer2.delays = [0]
buffer2.heights = [1]
buffer2.widths = [pulse_width]
buffer2.totaltime = pulse_width
buffer2.nrepeats = 0
buffer2.repeatstring = 'once'
buffer2.markerstring = 'lowAtStart'
buffer2.markerloc = 0
buffer2.create_sequence()
pulse2 = Arbseq_Class('pulse2', timestep)
pulse2.delays = [0]
pulse2.heights = [1]
pulse2.widths = [pulse_width]
pulse2.totaltime = pulse_width
pulse2.nrepeats = 0
pulse2.repeatstring = 'once'
pulse2.markerstring = 'lowAtStart'
pulse2.markerloc = 0
pulse2.create_sequence()
offset2 = Arbseq_Class('offset2', timestep)
offset2.delays = [0]
offset2.heights = [1]
offset2.widths = [pulse_width]
offset2.totaltime = pulse_width
offset2.nrepeats = 0
offset2.repeatstring = 'once'
offset2.markerstring = 'lowAtStart'
offset2.markerloc = 0
offset2.create_sequence()
dc2 = Arbseq_Class('dc2', timestep)
dc2.delays = [0]
dc2.heights = [-1]
dc2.widths = [params['pulse width'].magnitude]
dc2.totaltime = params['pulse width'].magnitude
dc2.repeatstring = 'repeat'
dc2.markerstring = 'lowAtStart'
dc2.markerloc = 0
period2 = params['period'].magnitude
width2 = params['pulse width'].magnitude
repeats = period2 / width2 - 3
dc2.nrepeats = repeats
dc2.create_sequence()
self.fungen.send_arb(buffer1, 1)
self.fungen.send_arb(pulse, 1)
self.fungen.send_arb(offset1, 1)
self.fungen.send_arb(dc, 1)
self.fungen.send_arb(buffer2, 2)
self.fungen.send_arb(pulse2, 2)
self.fungen.send_arb(offset2, 2)
self.fungen.send_arb(dc2, 2)
seq = [buffer1, pulse, offset1, dc]
seq2 = [buffer2, pulse2, offset2, dc2]
self.fungen.create_arbseq('twoPulse', seq, 1)
self.fungen.create_arbseq('shutter', seq2, 2)
self.fungen.wait()
self.fungen.voltage[
1] = params['pulse height'].magnitude + 0.000000000001 * i
self.fungen.voltage[2] = 7.1 + 0.000000000001 * i
self.fungen.sync()
print(self.fungen.voltage[1])
self.fungen.output[2] = 'ON'
self.fungen.output[1] = 'ON'
@Task()
def startpulse(self, timestep=1e-9):
self.configureQutag()
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
pulse_width = 200e-9
expparams = self.exp_parameters.widget.get()
period = self.pulse_parameters.widget.get()['period'].magnitude
for i in range(expparams['# of points']):
self.makePulse(pulse_width, i)
stoparray = []
startTime = time.time()
lost = self.qutag.getLastTimestamps(True)
while time.time(
) - startTime < expparams['Measurement Time'].magnitude:
time.sleep(10 * period)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
print(values)
for k in range(values):
# output all stop events together with the latest start event
# if tchannel[k] == start:
# synctimestamp = tstamp[k]
# else:
# stoptimestamp = tstamp[k]
stoparray.append(tstamp[k])
self.createHistogram(stoparray, timebase, bincount, period, i)
pulse_width += 50e-9
self.fungen.output[1] = 'OFF'
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Pulse parameters')
def pulse_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('pulse height', {
'type': float,
'default': 3,
'units': 'V'
}),
('pulse width', {
'type': float,
'default': 300e-9,
'units': 's'
}),
('period', {
'type': float,
'default': 0.1,
'units': 's'
}),
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {
'type': int,
'default': 20
}),
('Measurement Time', {
'type': int,
'default': 10,
'units': 's'
}),
('File Name', {
'type': str
})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {
'type': int,
'default': 0
}),
('Stop Channel', {
'type': int,
'default': 1
}),
('Bin Count', {
'type': int,
'default': 1000
})
]
w = ParamWidget(params)
return w
@startpulse.initializer
def initialize(self):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
@startpulse.finalizer
def finalize(self):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
class Lifetimewithshutter(Spyrelet):
requires = {'fungen': Keysight_33622A, 'wm': Bristol_771, 'srs': SRS900}
qutag = None
def configureQutag(self):
qutagparams = self.qutag_params.widget.get()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
##True = rising edge, False = falling edge. Final value is threshold voltage
self.qutag.setSignalConditioning(start, self.qutag.SIGNALCOND_MISC,
True, 1)
self.qutag.setSignalConditioning(stop, self.qutag.SIGNALCOND_MISC,
True, 0.1)
self.qutag.enableChannels((start, stop))
def createHistogram(self, stoparray, timebase, bincount, period, index,
wls):
hist = [0] * bincount
for stoptime in stoparray:
binNumber = int(stoptime * timebase * bincount / (period))
if binNumber >= bincount:
print('lost: ' + str(stoptime))
else:
hist[binNumber] += 1
out_name = "D:\\Data\\5.15.2019\\T1"
np.savez(
os.path.join(
out_name,
self.exp_parameters.widget.get()['File Name'] + str(index)),
hist, wls)
print('Data stored under File Name: ' +
self.exp_parameters.widget.get()['File Name'] + str(index))
@Task()
def startpulse(self, timestep=1e-9):
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
params = self.pulse_parameters.widget.get()
tau = params['start tau']
period = params['period'].magnitude
chn1pulse = Arbseq_Class('chn1pulse', timestep)
chn1pulse.delays = [0]
chn1pulse.heights = [1]
chn1pulse.widths = [params['pulse width'].magnitude]
chn1pulse.totaltime = params['pulse width'].magnitude
chn1pulse.nrepeats = 0
chn1pulse.repeatstring = 'once'
chn1pulse.markerstring = 'highAtStartGoLow'
chn1pulse.markerloc = 0
chn1pulsewidth = params['pulse width'].magnitude
chn1pulse.create_sequence()
chn1dc = Arbseq_Class('chn1dc', timestep)
chn1dc.delays = [0]
chn1dc.heights = [0]
chn1dc.widths = [params['repeat unit'].magnitude]
chn1dc.totaltime = params['repeat unit'].magnitude
chn1dc.repeatstring = 'repeat'
chn1dc.markerstring = 'lowAtStart'
chn1dc.markerloc = 0
chn1dcrepeats = int((tau.magnitude - params['pulse width'].magnitude) /
(params['repeat unit'].magnitude))
chn1dc.nrepeats = chn1dcrepeats
chn1dcwidth = (params['repeat unit'].magnitude) * chn1dcrepeats
print(tau.magnitude, params['pulse width'].magnitude, chn1dcrepeats)
chn1dc.create_sequence()
chn1pulse2 = Arbseq_Class('chn1pulse2', timestep)
chn1pulse2.delays = [0]
chn1pulse2.heights = [1]
chn1pulse2.widths = [params['pulse width'].magnitude]
chn1pulse2.totaltime = params['pulse width'].magnitude
chn1pulse2width = params['pulse width'].magnitude
chn1pulse2.nrepeats = 0
chn1pulse2.repeatstring = 'once'
chn1pulse2.markerstring = 'lowAtStart'
chn1pulse2.markerloc = 0
chn1pulse2.create_sequence()
chn1pulse3 = Arbseq_Class('chn1pulse3', timestep)
chn1pulse3.delays = [0]
chn1pulse3.heights = [0]
chn1pulse3.widths = [params['repeat unit'].magnitude]
chn1pulse3.totaltime = params['repeat unit'].magnitude
chn1pulse3width = 400e-9
chn1pulse3.nrepeats = 400e-9 / params['repeat unit'].magnitude
chn1pulse3.repeatstring = 'repeat'
chn1pulse3.markerstring = 'lowAtStart'
chn1pulse3.markerloc = 0
chn1pulse3.create_sequence()
chn1dc2 = Arbseq_Class('chn1dc2', timestep)
chn1dc2.delays = [0]
chn1dc2.heights = [0]
chn1dc2.widths = [params['repeat unit'].magnitude]
chn1dc2.totaltime = params['repeat unit'].magnitude
chn1dc2.repeatstring = 'repeat'
chn1dc2.markerstring = 'lowAtStart'
chn1dc2repeats = int(
(params['period'].magnitude - tau.magnitude -
params['pulse width'].magnitude - chn1pulse3width) /
(params['repeat unit'].magnitude))
chn1dc2.nrepeats = chn1dc2repeats
chn1dc2.markerloc = 0
print((chn1dc2repeats * params['repeat unit'].magnitude) +
tau.magnitude + params['pulse width'].magnitude)
chn1dc2.create_sequence()
chn2pulse1 = Arbseq_Class('chn2pulse1', timestep)
chn2pulse1.delays = [0]
chn2pulse1.heights = [1]
# chn2pulse1width = pulsewidth+pulse2width+dcwidth
chn2pulse1.widths = [params['pulse width'].magnitude]
chn2pulse1.totaltime = params['pulse width'].magnitude
chn2pulse1.nrepeats = 0
chn2pulse1.repeatstring = 'once'
chn2pulse1.markerstring = 'highAtStartGoLow'
chn2pulse1.markerloc = 0
chn2pulse1.create_sequence()
chn2dc1 = Arbseq_Class('chn2dc1', timestep)
chn2dc1.delays = [0]
chn2dc1.heights = [1]
chn2dc1.widths = [params['repeat unit'].magnitude]
chn2dc1.totaltime = params['repeat unit'].magnitude
chn2dc1.repeatstring = 'repeat'
chn2dc1.markerstring = 'lowAtStart'
chn2dc1.markerloc = 0
chn2dc1repeats = int(
(tau.magnitude - params['pulse width'].magnitude) /
(params['repeat unit'].magnitude))
chn2dc1.nrepeats = chn2dc1repeats
chn2dc1width = (params['repeat unit'].magnitude) * chn2dc1repeats
chn2dc1.create_sequence()
chn2pulse2 = Arbseq_Class('chn2pulse2', timestep)
chn2pulse2.delays = [0]
chn2pulse2.heights = [1]
chn2pulse2.widths = [params['pulse width'].magnitude]
chn2pulse2.totaltime = params['pulse width'].magnitude
chn2pulse2width = params['pulse width'].magnitude
chn2pulse2.nrepeats = 0
chn2pulse2.repeatstring = 'once'
chn2pulse2.markerstring = 'lowAtStart'
chn2pulse2.markerloc = 0
chn2pulse2.create_sequence()
chn2pulse3 = Arbseq_Class('chn2pulse3', timestep)
chn2pulse3.delays = [0]
chn2pulse3.heights = [1]
chn2pulse3.widths = [params['repeat unit'].magnitude]
chn2pulse3.totaltime = params['repeat unit'].magnitude
chn2pulse3width = 400e-9
chn2pulse3.nrepeats = 400e-9 / params['repeat unit'].magnitude
chn2pulse3.repeatstring = 'repeat'
chn2pulse3.markerstring = 'lowAtStart'
chn2pulse3.markerloc = 0
chn2pulse3.create_sequence()
chn2dc2 = Arbseq_Class('chn2dc2', timestep)
chn2dc2.delays = [0]
chn2dc2.heights = [-1]
chn2dc2.widths = [params['repeat unit'].magnitude]
chn2dc2.totaltime = params['repeat unit'].magnitude
chn2dc2.repeatstring = 'repeat'
chn2dc2.markerstring = 'lowAtStart'
chn2dc2repeats = int(
(params['period'].magnitude - tau.magnitude -
params['pulse width'].magnitude - chn2pulse3width) /
(params['repeat unit'].magnitude))
chn2dc2.nrepeats = chn2dc2repeats
chn2dc2.markerloc = 0
print((chn2dc2repeats * params['repeat unit'].magnitude) +
tau.magnitude + params['pulse width'].magnitude)
chn2dc2.create_sequence()
self.fungen.send_arb(chn1pulse, 1)
self.fungen.send_arb(chn1dc, 1)
self.fungen.send_arb(chn1pulse2, 1)
self.fungen.send_arb(chn1pulse3, 1)
self.fungen.send_arb(chn1dc2, 1)
self.fungen.send_arb(chn2pulse1, 2)
self.fungen.send_arb(chn2dc1, 2)
self.fungen.send_arb(chn2pulse2, 2)
self.fungen.send_arb(chn2pulse3, 2)
self.fungen.send_arb(chn2dc2, 2)
seq = [chn1pulse, chn1dc, chn1pulse2, chn1pulse3, chn1dc2]
seq2 = [chn2pulse1, chn2dc1, chn2pulse2, chn2pulse3, chn2dc2]
self.fungen.create_arbseq('twoPulse', seq, 1)
self.fungen.create_arbseq('shutter', seq2, 2)
self.fungen.wait()
self.fungen.voltage[
1] = params['pulse height'].magnitude + 0.000000000001
self.fungen.voltage[2] = 7.0 + 0.0000000000001
print(self.fungen.voltage[1], self.fungen.voltage[2])
self.fungen.output[1] = 'ON'
self.fungen.output[2] = 'ON'
#self.fungen.output[2] = 'OFF'
self.fungen.trigger_delay(1, 400e-9)
self.fungen.sync()
self.srs.module_reset[5]
self.srs.SIM928_voltage[5] = params['srs bias'].magnitude
self.srs.SIM928_on[5]
self.configureQutag()
qutagparams = self.qutag_params.widget.get()
lost = self.qutag.getLastTimestamps(True) # clear Timestamp buffer
stoptimestamp = 0
synctimestamp = 0
bincount = qutagparams['Bin Count']
timebase = self.qutag.getTimebase()
start = qutagparams['Start Channel']
stop = qutagparams['Stop Channel']
expparams = self.exp_parameters.widget.get()
for i in range(expparams['# of points']):
##Wavemeter measurements
stoparray = []
startTime = time.time()
wls = []
lost = self.qutag.getLastTimestamps(True)
while time.time(
) - startTime < expparams['Measurement Time'].magnitude:
lost = self.qutag.getLastTimestamps(True)
time.sleep(30 * period)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
wls.append(str(self.wm.measure_wavelength()))
self.createHistogram(stoparray, timebase, bincount, period, i, wls)
print('Approx. ' + str(
int((expparams['# of points'] - i) /
expparams['Measurement Time'].magnitude)) + ' min left')
#self.fungen.voltage[2] = self.fungen.voltage[2].magnitude + 2*dcparams['DC step size'].magnitude
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
startTime = time.time()
startWl = self.wm.measure_wavelength()
stoparray = []
lastwls = []
while time.time(
) - startTime < expparams['Measurement Time'].magnitude:
time.sleep(period)
timestamps = self.qutag.getLastTimestamps(True)
tstamp = timestamps[0] # array of timestamps
tchannel = timestamps[1] # array of channels
values = timestamps[2] # number of recorded timestamps
for k in range(values):
# output all stop events together with the latest start event
if tchannel[k] == start:
synctimestamp = tstamp[k]
else:
stoptimestamp = tstamp[k]
stoparray.append(stoptimestamp)
lastwls.append(str(self.wm.measure_wavelength()))
self.createHistogram(stoparray, timebase, bincount, period, 'bg',
lastwls)
@Task()
def qutagInit(self):
print('qutag successfully initialized')
@Element(name='Pulse parameters')
def pulse_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('pulse height', {
'type': float,
'default': 3,
'units': 'V'
}),
('pulse width', {
'type': float,
'default': 1000e-9,
'units': 's'
}),
('period', {
'type': float,
'default': 0.1,
'units': 's'
}),
('repeat unit', {
'type': float,
'default': 50e-9,
'units': 's'
}),
('start tau', {
'type': float,
'default': 2e-6,
'units': 's'
}),
('stop tau', {
'type': float,
'default': 10e-6,
'units': 's'
}),
('step tau', {
'type': float,
'default': 1e-6,
'units': 's'
}),
('srs bias', {
'type': float,
'default': 1.2,
'units': 'V'
})
]
w = ParamWidget(params)
return w
@Element(name='Experiment Parameters')
def exp_parameters(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('# of points', {
'type': int,
'default': 10
}),
('Measurement Time', {
'type': int,
'default': 300,
'units': 's'
}),
('File Name', {
'type': str
})
]
w = ParamWidget(params)
return w
@Element(name='QuTAG Parameters')
def qutag_params(self):
params = [
# ('arbname', {'type': str, 'default': 'arbitrary_name'}),,
('Start Channel', {
'type': int,
'default': 0
}),
('Stop Channel', {
'type': int,
'default': 1
}),
('Bin Count', {
'type': int,
'default': 1000
})
]
w = ParamWidget(params)
return w
@startpulse.initializer
def initialize(self):
self.wm.start_data()
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
self.fungen.clear_mem(1)
self.fungen.clear_mem(2)
self.fungen.wait()
@startpulse.finalizer
def finalize(self):
self.wm.stop_data()
self.fungen.output[1] = 'OFF'
self.fungen.output[2] = 'OFF'
print('Lifetime measurements complete.')
return
@qutagInit.initializer
def initialize(self):
from lantz.drivers.qutools import QuTAG
self.qutag = QuTAG()
devType = self.qutag.getDeviceType()
if (devType == self.qutag.DEVTYPE_QUTAG):
print("found quTAG!")
else:
print("no suitable device found - demo mode activated")
print("Device timebase:" + str(self.qutag.getTimebase()))
return
@qutagInit.finalizer
def finalize(self):
return
