Study of Signal-Induced Noise in Single-Photon Ranging Lidar Systems
For the single-photon ranging lidar system,the strong background light from both the emitted laser instantaneously and the backscattering of the near field will cause the photomultiplier to generate signal-induced noise(SIN),which seriously affects the detection of subsequent targets.In order to accurately calibrate the SIN at the single-photon level,a complete SIN detection and evaluation platform is built based on a self-developed single-photon ranging echo simulator and a pulsed laser with a fixed width of 10 ns.The induced noise under strong background light of different energy has been measured,and is also fitted using the relevant empirical formulas.According to the actual ranging system,the background light energy received at the detector should be less than 100 pJ in order to meet the signal-to-noise ratio requirement of 100 km-level ranging target inversion.This research provides an important reference for the performance evaluation of the single-photon ranging lidar system.
remote sensing and sensorssingle-photon rangingsignal-induced noisephotomultiplier tubeecho simulator
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