photodiode

photonforge.abstract.photodiode(*, responsivity=1, gain=1, saturation_voltage=0, saturation_current=0, roll_off=2, dark_current=0, thermal_noise=, pink_noise_frequency=0, current_time_constant=0, filter_frequency=0, filter_quality=0, filter_gain=1, reflection=0, z0=50.0, seed=None)[source]

Abstract photodiode.

Based on photonforge.PhotodiodeTimeStepper.

Parameters:

  • responsivity (Annotated[float, minimum=0, units='A/W']) – Optical power to current conversion factor.

  • gain (Annotated[float, units='V/A']) – TIA gain.

  • saturation_voltage (Annotated[float, minimum=0, units='V']) – If non-zero, output saturation voltage of the TIA.

  • saturation_current (Annotated[float, minimum=0]) – If non-zero, photocurrent of the space-charge saturation model.

  • roll_off (Annotated[float, minimum=0]) – Roll-off factor for the space-charge saturation model.

  • dark_current (Annotated[float, units='A']) – Photodiode’s dark current.

  • thermal_noise (Annotated[float, minimum=0, units='A²/Hz']) – One-sided power spectral density of the TIA’s input-referred thermal noise current.

  • pink_noise_frequency (Annotated[float, minimum=0, units='Hz']) – Pink (1/f) noise corner frequency. If set to 0, pink noise is disabled.

  • current_time_constant (Annotated[float, minimum=0, units='s']) – Time constant for the running photocurrent average. A value of zero sets a default of 100 time steps.

  • filter_frequency (Annotated[float, minimum=0, units='Hz']) – If positive, sets the -3 dB frequency bandwidth for the first-order low-pass TIA filter. If a second-order filter is used (filter_quality > 0), this is its natural frequency.

  • filter_quality (Annotated[float, minimum=0]) – If positive, enables a second-order filter for the TIA with this quality factor. Only when filter_frequency > 0.

  • filter_gain (Annotated[float, exclusiveMinimum=0]) – Gain of the second-order TIA filter. Only used when filter_frequency > 0 and filter_quality > 0.

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

  • z0 (Annotated[complex, units='Ω']) – Characteristic impedance of the electrical port used to convert the output voltage to field amplitude. If None, derived from port impedance, calculated by mode-solving, or set to 50 Ω.

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

Return type:

Component