finesse.detectors.quantum_noise_detector.QuantumNoiseDetectorDemod2

Overview

class finesse.detectors.quantum_noise_detector.QuantumNoiseDetectorDemod2(name, node, f1, phase1, f2, phase2, nsr=False, sources=None, exclude_sources=None)[source]

Bases: finesse.detectors.general.Detector, finesse.detectors.general.NoiseDetector

Represents a quantum noise detector with 2 RF demodulations.

It calculates the amplitude spectral density of the photocurrent noise of a photodiode output demodulated at the signal frequency.

Parameters

name : str

Name of newly created quantum noise detector.

node : Node

Node to read output from.

f1 : float

First demodulation frequency in Hz

phase1 : float

First demodulation phase in degrees

f2 : float

Second demodulation frequency in Hz

phase2 : float

Second demodulation phase in degrees

nsr : bool, optional

If true, calculate the noise-to-signal ratio rather than the absolute noise value.

sources : list of Connector, optional

If given, only detect quantum noise contributions from these components.