METHOD FOR DETECTING PULSED OPTICAL SIGNALS Russian patent published in 2023 - IPC H01L31/09 

FIELD: optics.

SUBSTANCE: technique for isolating signals from noise used in any area where determining noise parameters is required. A method for detecting pulsed optical signals, including threshold processing of signals and the formation of output pulses when the output signal of a photodiode exceeds a specified response threshold, includes a parameter determination modeα of avalanche multiplication noise factor, in which the frequency of noise emissions exceeding the threshold is selected, the frequency of noise emissions exceeding the threshold is set, the photodiode bias voltage is set at which the avalanche multiplication coefficient is M = 1, the response threshold is set at the level at which the average frequency of noise emissions exceeding it equal to f_MA, then increase the threshold, thereby reducing the frequency of noise exceeding the threshold to the level of f_A, and set the avalanche multiplication coefficient M, at which the frequency of noise exceeding the threshold becomes equal to f_MA, in this mode increase the threshold, determine the average frequency of noise exceeding the threshold f_A* and calculate the parameterα noise factor of avalanche multiplication.

EFFECT: rapid determination of the parameters of fluctuation noise.

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