基于APD线列的单光子探测计数研究

Study of Single-photon Detection Based on the Linear Array APD

摘要:

单光子探测系统可以对单个光子进行探测；探测系统含有探测部分、淬灭电路部分和计数部分；探测部分主要由工作在盖革模式下的雪崩光电二极管组成；在盖革模式下的雪崩光电二极管发生雪崩后不能自然停止,淬灭部分主要为了主动抑制雪崩电流,快速降低雪崩电压,以达到提高探测效率,降低错误计数的目的；APD线列产生多个光子脉冲信号,计数部分的主要功能是对多路光子脉冲信号进行计数、显示并且可以控制每路APD的比较电压,保证每路APD淬灭电路的正常工作。

Abstract:

The single-photon detection system can detect a single photon;detection system includes detection section, quenching circuit section and the counting section; Detecting section consists of avalanche photodiode, which works in Geiger mode; Avalanche photodiode can not stop naturally, quenched section aim to active suppression avalanche current, reduce avalanche voltage rapidly, to reach the goal of improving the detection efficiency and reducing the error count ; APD Linear Array produce multiple photon pulse signal,The main function of the counting section is counting and displaying multi-channel photon pulse signals, controling each road respectively, ensure the normal work of the APD quench circuit.