OpticalNoiseTimeStepper

class photonforge.OpticalNoiseTimeStepper(*, noise, reflection=0, seed=None)

Time-stepper for an optical white-noise source.

This model generates zero-mean, circularly symmetric complex Gaussian noise. It is a memoryless source, producing a new independent sample at each time step.

Parameters:

• noise (Annotated[float, minimum=0, units='√(W/Hz)']) – One-sided, amplitude spectral density (ASD) of noise.

• reflection (complex) – Reflection coefficient for incident fields.

• seed (Annotated[int, minimum=0] | None) – Random number generator seed to ensure reproducibility.

Methods

bind_native(step, keys[, state, cstate, context])	Bind a compiled step function.
reset()	Reset any internal state of the time stepper.
setup(component, time_step, *[, ...])	Initialize the time stepper.
setup_state(*, component, time_step, **kwargs)	Initialize internal state.
step([inputs, steps, time_step, show_progress])	Compute the outputs of this time stepper, given inputs.
step_single(inputs, outputs, time_index, ...)	Take a single time step on the given inputs.
update(*args, **kwargs)	Update this time stepper.
write_verilog_a(path, *[, backend, ...])	Write this configured time stepper as one Verilog-A module.

Attributes

parametric_function	Function used to update the time stepper.
parametric_kwargs	Keyword arguments used to update the time stepper.
path_delays	Minimum delay in time steps of each (input key, output key) signal path; missing pairs have no path and None means every input reaches every output within the time step.
properties	Object properties.
random_variables	Random variables associated to the time stepper's parameters.

setup_state(*, component, time_step, **kwargs)

Initialize internal state.

Parameters:

• component (Component) – Component representing the noise source.

• time_step (Annotated[float, minimum=0, units='s']) – The interval between time steps (in seconds).

• kwargs (object) – Unused.

Return type:

None