def _gen_p_block(self):
count_trace_pb = pb.PulseBlock()
# Sample clock
t_step = (self._l_margin + self._laser_dur +
self._r_margin) / self._n_pts
for idx in range(self._n_pts):
count_trace_pb.append(
p_obj=po.PTrue(ch='ctr_gate', dur=t_step / 2, t0=t_step / 2))
# Laser pulse
count_trace_pb.insert(
p_obj=po.PTrue(ch='aom', dur=self._laser_dur, t0=self._l_margin))
# Relaxation period and all off pulse block
count_trace_pb.append(
p_obj=po.PFalse(ch='aom', dur=t_step, t0=self._relax))
count_trace_pb.append(p_obj=po.PFalse(
ch='ctr_gate',
dur=t_step,
))
# Duration of full PB
# [for gated_ctr.get_count_ar() timeout]
self._pb_dur = count_trace_pb.dur
# Default value
count_trace_pb.dflt_dict = dict(aom=po.DFalse(), ctr_gate=po.DFalse())
return count_trace_pb
def _gen_rfcs_block():
optimize_pb = pb.PulseBlock()
optimize_pb.insert(p_obj=po.PTrue(ch='aom', dur=1e-6))
optimize_pb.insert(p_obj=po.PTrue(ch='mw_gate', dur=1e-6))
optimize_pb.dflt_dict = dict(aom=po.DTrue(), mw_gate=po.DTrue())
return optimize_pb
def _gen_rfcs_block():
optimize_pb = pb.PulseBlock(
p_obj_list=[
po.PTrue(ch='aom', dur=1e-6)
],
dflt_dict=dict(aom=po.DTrue())
)
return optimize_pb
def _gen_rabi_elem(tau=0, safety_window=200e-9):
rabi_elem = pb.PulseBlock()
# Init green_aom pulse
rabi_elem.insert(p_obj=po.PTrue(ch='aom', dur=2e-6 +
2 * safety_window))
# Normalization pulse
rabi_elem.insert(p_obj=po.PTrue(ch='ctr_gate', t0=1.5e-6, dur=0.5e-6))
# mw pulse
rabi_elem.append(
p_obj=po.PTrue(ch='mw_gate', dur=tau, t0=4 * safety_window))
tmp_dur = rabi_elem.dur + 4 * safety_window
# Readout AOM pulse
rabi_elem.insert(p_obj=po.PTrue(ch='aom', dur=1e-6, t0=tmp_dur))
# readout ctr_gate pulse
rabi_elem.insert(p_obj=po.PTrue(ch='ctr_gate', dur=0.5e-6, t0=tmp_dur))
return rabi_elem
def _gen_p_block(self, safety_window=200e-9):
# ========== Prepare individual blocks =========
# ------- pre_init_pb --------
# Long optical pumping before first pulse
pre_init_pb = pb.PulseBlock(p_obj_list=[po.PTrue(ch='aom', dur=3e-6)])
# ------- all_off_pb --------
# Switch all channels off after the full pulse sequence
all_off_pb = pb.PulseBlock(p_obj_list=[
po.PFalse(ch='aom', dur=1e-6),
po.PFalse(ch='mw_gate', dur=1e-6),
po.PFalse(ch='ctr_gate', dur=1e-6)
])
# ========== Construct full rabi_pb =========
rabi_pb = pb.PulseBlock(name='RabiPB')
# Pre-init block
rabi_pb.insert_pb(pb_obj=pre_init_pb)
# rabi_element ** n_pts
for tau in self.tau_ar:
rabi_pb.append_pb(pb_obj=self._gen_rabi_elem(
tau=tau, safety_window=safety_window))
# All-off block
rabi_pb.append_pb(pb_obj=all_off_pb)
# Default values
rabi_pb.dflt_dict = dict(aom=po.DFalse(),
ctr_gate=po.DFalse(),
mw_gate=po.DFalse())
# Correct for aom delay
rabi_pb.add_offset(offset_dict=dict(aom=-self._aom_delay))
# Duration of full RabiPB
# [for gated_ctr.get_count_ar() timeout]
self._rabi_pb_dur = rabi_pb.dur
return rabi_pb
def _gen_p_block(self, debug=False):
# Technical params
# safety window between mw_src makes a step and
# before counter starts accumulation of counts
safety_window = 0.1 * self._accum_dur
# Duration of sweep-step pulse
step_pulse_dur = 0.1 * self._accum_dur # 200e-6
# ========== Prepare individual blocks =========
# ------- first_pb --------
# First point in the sweep:
# mw_src should reset sweep position to start_f,
# so there is no need to send step_trig pulse
first_pb = pb.PulseBlock()
# long safety window in the beginning
first_pb.insert(p_obj=po.PFalse(ch='ctr_gate', dur=self._accum_dur))
# first ctr_gate pulse
first_pb.append(p_obj=po.PTrue(ch='ctr_gate', dur=self._accum_dur))
# ------- step_pb --------
# This pb is repeated for every subsequent sweep step:
# send ctr_trig pulse, wait for a safety window and
# start accumulating pulses
step_pb = pb.PulseBlock()
# step pulse to mw_src
step_pb.insert(p_obj=po.PTrue(ch='mw_step', dur=step_pulse_dur))
# ctr_gate pulse
step_pb.append(p_obj=po.PTrue(
ch='ctr_gate', dur=self._accum_dur, t0=safety_window))
# ------- off_pb --------
# Once sweep is complete, set all outputs to low
off_pb = pb.PulseBlock()
off_pb.insert(p_obj=po.PFalse(ch='aom', dur=safety_window))
off_pb.insert(p_obj=po.PFalse(ch='mw_gate', dur=safety_window))
off_pb.insert(p_obj=po.PFalse(ch='mw_step', dur=safety_window))
off_pb.insert(p_obj=po.PFalse(ch='ctr_gate', dur=safety_window))
# ========== Construct full odmr_pb =========
odmr_pb = pb.PulseBlock(name='ODMRPulseBlock')
# Default values
odmr_pb.dflt_dict = dict(
aom=po.DFalse(),
ctr_gate=po.DFalse(),
mw_gate=po.DFalse(),
mw_step=po.DFalse(),
)
# first_bp
odmr_pb.insert_pb(pb_obj=first_pb)
# append step_bp ** (_n_pts-1)
for _ in np.arange(start=1, stop=self._n_pts):
odmr_pb.append_pb(pb_obj=step_pb)
# aom and mw_gate are High during the whole block
tmp_dur = odmr_pb.dur
odmr_pb.insert(p_obj=po.PTrue(ch='aom', dur=tmp_dur))
odmr_pb.insert(p_obj=po.PTrue(ch='mw_gate', dur=tmp_dur))
# append off_pb
odmr_pb.append_pb(pb_obj=off_pb)
if debug:
return dict(first_pb=first_pb,
step_pb=step_pb,
off_pb=off_pb,
odmr_pb=odmr_pb)
else:
return odmr_pb