背景辐射对恒虚警补偿下APD倍增因子的影响  

Effect of Background Radiation on APD Multiplication Factor under the Compensation of Constant False Alarm Rate

作　　者：周冰 刘贺雄 贺宣 高宇辰[2] 范磊 ZHOU Bing;LIU He-xiong;HE Xuan;GAO Yu-chen;FAN Lei(Department of Electronic&Optical Engineering,Army Engineering University of PLA,Shijiazhuang 050003,China;Jiuquan Satellite Launch Center,Jiuquan,Gansu 732750 China;PLA 31648 Troops,Chongzuo,Guangxi 532200,China)

机构地区：[1]陆军工程大学石家庄校区电子与光学工程系,石家庄050003 [2]酒泉卫星发射中心,甘肃酒泉732750 [3]解放军31648部队,广西崇左532200

出　　处：《光子学报》2018年第10期50-56,共7页Acta Photonica Sinica

基　　金：河北省自然科学基金(No.F2016506014)资助

摘　　要：针对恒虚警下雪崩光电二极管输出信号、噪声与倍增因子相互影响的问题,分析了雪崩光电二极管自身噪声、背景辐射对其探测性能的影响及恒虚警补偿方式的原理,建立了背景辐射与恒虚警下倍增因子的关系模型.对模型进行了实验验证,并通过仿真分析了不同虚警概率、阈值电流、噪声电流下背景辐射与倍增因子的关系.结果表明:倍增因子会随背景辐射的增大而减小,且减小速率逐渐减缓;当背景辐射不变时,虚警概率或阈值电流的增大都会使倍增因子增大;热噪声与放大器噪声有效值之和对倍增因子影响较大,而暗电流对倍增因子的影响较小.Aiming at the mutual influence of signal,noise and multiplication factors of the avalanche photodiode under constant false alarm,the effects of the avalanche photodiode′s own noise and background radiation on the detection performance and the principle of constant false alarm noise compensation were analyzed.The relationship model of background radiation with the constant false alarm multiplication factor were established.The model was verified by experiments,and the relationship between background radiation and multiplication factors under different false alarm probability,threshold current,and noise current was simulated and analyzed.It is found that the multiplication factor would decrease with the increase of background radiation,and the decreasing rate gradually slows down.When the background radiation is constant,the increase of the false alarm probability or the threshold current will increase the multiplication factor.The sum of effective value of the thermal noise and the amplifier noise has a greater influence on the multiplication factor,while the dark current has less influence on the multiplication factor.

关 键 词：光电子 探测器 雪崩光电二极管 背景辐射 恒虚警概率 探测能力 雪崩增益 

分 类 号：TN215[电子电信—物理电子学]