#####################################################################
# #
# detuning.py #
# #
# Copyright 2013, Monash University #
# #
# This file is part of the labscript suite (see #
# http://labscriptsuite.org) and is licensed under the Simplified #
# BSD License. See the license.txt file in the root of the project #
# for the full license. #
# #
#####################################################################
from .UnitConversionBase import *
[docs]class detuning(UnitConversion):
base_unit = 'Hz'
derived_units = ['MHz', 'd_MHz', 'linewidths']
[docs] def __init__(self, calibration_parameters=None):
self.parameters = calibration_parameters
self.parameters.setdefault('pass', 1) # specify single- or double-pass with sign
self.parameters.setdefault('detuning_0', 0) # detuning of input light in MHz
self.parameters.setdefault('gamma', 6.065) # natural linewidth in MHz
self.parameters.setdefault('aom_f0', False) # rf frequency corrresponding to resonance in MHz
UnitConversion.__init__(self,self.parameters)
[docs] def MHz_to_base(self, aom_frequency_MHz):
return 1e6*aom_frequency_MHz
[docs] def MHz_from_base(self, aom_frequency):
return 1e-6*aom_frequency
[docs] def d_MHz_to_base(self, detuning_MHz):
if not self.parameters['aom_f0']:
aom_frequency_MHz = (detuning_MHz - self.parameters['detuning_0'])/self.parameters['pass']
else:
aom_frequency_MHz = detuning_MHz/self.parameters['pass'] + self.parameters['aom_f0']
return self.MHz_to_base(aom_frequency_MHz)
[docs] def d_MHz_from_base(self, aom_frequency):
aom_frequency_MHz = self.MHz_from_base(aom_frequency)
if not self.parameters['aom_f0']:
detuning_MHz = self.parameters['pass']*aom_frequency_MHz + self.parameters['detuning_0']
else:
detuning_MHz = self.parameters['pass']*(aom_frequency_MHz - self.parameters['aom_f0'])
return detuning_MHz
[docs] def linewidths_to_base(self, linewidths):
aom_frequency = self.d_MHz_to_base(self.parameters['gamma'] * linewidths)
return aom_frequency
[docs] def linewidths_from_base(self, aom_frequency):
linewidths = self.d_MHz_from_base(aom_frequency) / self.parameters['gamma']
return linewidths