Adaptive aperture for Geiger mode avalanche photodiode flash ladar systems

作者：Wang, Liang; Han, Shaokun^*; Xia, Wenze; Lei, Jieyu

来源：Review of Scientific Instruments, 2018, 89(2): 023105.

DOI：10.1063/1.4989748

• MU-M
• LASER
• RADAR

Although the Geiger-mode avalanche photodiode (GM-APD) flash ladar system offers the advantages of high sensitivity and simple construction, its detection performance is influenced not only by the incoming signal-to-noise ratio but also by the absolute number of noise photons. In this paper, we deduce a hyperbolic approximation to estimate the noise-photon number from the false-firing percentage in a GM-APD flash ladar system under dark conditions. By using this hyperbolic approximation function, we introduce a method to adapt the aperture to reduce the number of incoming background-noise photons. Finally, the simulation results show that the adaptive-aperture method decreases the false probability in all cases, increases the detection probability provided that the signal exceeds the noise, and decreases the average ranging error per frame. Published by AIP Publishing.

• 出版日期2018-2
• 单位北京理工大学