def enforce_units(val, units):
if not isinstance(val, Q_):
val = Q_(val, units)
else:
val = val.to(units)
return val
class WS7(LibraryDriver, Wavemeter):
LIBRARY_NAME = r'C:\Windows\System32\wlmData.dll' # This must be the same file used by the Server application ("Wavelength Meter Application")
LIBRARY_PREFIX = ''
def __init__(self):
super().__init__()
self.lib = LoadDLL(self.lib)
self.timeout = Q_(10, 's')
return
def initialize(self, devNo=None):
pass
def finalize(self):
pass
@DictFeat(keys=[1, 2, 3, 4], units='THz')
def frequency(self, key):
"""This allows multiple retry if the signal is too high or too low
This assumes automatic exposure mode where the signal might be adjusted over time"""
start_time = time.time()
while time.time() - start_time < self.timeout.to('s').m:
ans = self.lib.GetFrequencyNum(key, 0)
if GetFrequency_Errorvalues.has_value(ans):
if not ans in [
-3, -4
]: # Raise exception if error is not signal strength related
break
else:
return ans
raise Exception("WS7 GetFrequency Error" +
str(GetFrequency_Errorvalues(ans)))
@DictFeat(keys=[1, 2, 3, 4], units='nm')
def wavelength(self, key):
"""This allows multiple retry if the signal is too high or too low
This assumes automatic exposure mode where the signal might be adjusted over time"""
start_time = time.time()
while time.time() - start_time < self.timeout.to('s').m:
ans = self.lib.GetWavelengthNum(key, 0)
if GetWavelength_Errorvalues.has_value(ans):
if not ans in [
-3, -4
]: # Raise exception if error is not signal strength related
break
else:
return ans
raise Exception("WS7 GetFrequency Error" +
str(GetWavelength_Errorvalues(ans)))
@DictFeat(keys=[1, 2, 3, 4], units='THz')
def raw_frequency(self, key):
ans = self.lib.GetFrequencyNum(key, 0)
if GetFrequency_Errorvalues.has_value(ans):
raise Exception("WS7 GetFrequency Error" +
str(GetFrequency_Errorvalues(ans)))
else:
return ans
@DictFeat(keys=[1, 2, 3, 4], units='nm')
def raw_wavelength(self, key):
ans = self.lib.GetWavelengthNum(key, 0)
if GetWavelength_Errorvalues.has_value(ans):
raise Exception("WS7 GetWavelength Error" +
str(GetFrequency_Errorvalues(ans)))
else:
return ans