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Nonlinear coefficient scaling along frequency

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The nonlinear coefficient can be expressed at the reference frequency and will be scaled in frequency using the scaling rule of the effective area

Change-Id: Id103b227472702776bda17ab0a2a120ecfbf7473
This commit is contained in:
AndreaDAmico
2023-10-06 04:17:17 +02:00
committed by EstherLerouzic
parent 88ac41f721
commit edf1eec072
20 changed files with 391 additions and 372 deletions
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14
gnpy/core/parameters.py
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@@ -191,16 +191,17 @@ class FiberParams(Parameters):
self._effective_area = kwargs.get('effective_area') # m^2
self._n1 = 1.468
self._core_radius = 4.2e-6 # m
n2 = 2.6e-20 # m^2/W
self._n2 = 2.6e-20 # m^2/W
if self._effective_area is not None:
self._gamma = kwargs.get('gamma', 2 * pi * n2 / (self.ref_wavelength * self._effective_area)) # 1/W/m
default_gamma = 2 * pi * self._n2 / (self._ref_wavelength * self._effective_area)
self._gamma = kwargs.get('gamma', default_gamma) # 1/W/m
elif 'gamma' in kwargs:
self._gamma = kwargs['gamma'] # 1/W/m
self._effective_area = 2 * pi * n2 / (self.ref_wavelength * self._gamma) # m^2
self._effective_area = 2 * pi * self._n2 / (self._ref_wavelength * self._gamma) # m^2
else:
self._gamma = 0 # 1/W/m
self._effective_area = 83e-12 # m^2
self._contrast = 0.5 * (c / (2 * pi * self.ref_frequency * self._core_radius * self._n1) * exp(
self._gamma = 2 * pi * self._n2 / (self._ref_wavelength * self._effective_area) # 1/W/m
self._contrast = 0.5 * (c / (2 * pi * self._ref_frequency * self._core_radius * self._n1) * exp(
pi * self._core_radius ** 2 / self._effective_area)) ** 2
# Raman Gain Coefficient
@@ -295,6 +296,9 @@ class FiberParams(Parameters):
return squeeze(outer(effective_area_stokes_wave, ones(effective_area_pump.size)) + outer(
ones(effective_area_stokes_wave.size), effective_area_pump)) / 2
def gamma_scaling(self, frequency):
return asarray(2 * pi * self._n2 * frequency / (c * self.effective_area_scaling(frequency)))
@property
def pmd_coef(self):
return self._pmd_coef