基于非线性相关源雪崩管模型的恒虚警激光测距电路仿真试验研究  

Simulation Test Research of Constant False Alarm Laser Ranging Circuit Based on Nonlinear Dependent Source APD Model

作　　者：王巍[1,2] 赵启航 杨森[1,2] 张珂[1,2] 柳兴博 刘彤宇 WANG Wei;ZHAO Qihang;YANG Sen;ZHANG Ke;LIU Xingbo;LIU Tongyu(Key Laboratory of Photonic Control Technology,Department of Precision Instrument,Tsinghua University,Beijing 100084,China;State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instrument,Tsinghua University,Beijing 100084,China;Science and Technology on Electro-Optical Information Security Control Laboratory,53rd Research Institute of China Electronics Technology Group Corporation,Tianjin 300308,China)

机构地区：[1]清华大学精密仪器系激光与光子技术研究所,北京100084 [2]清华大学精密仪器系精密测量技术与仪器国家重点实验室,北京100084 [3]中国电子科技集团公司第五十三研究所光电信息控制与安全技术重点实验室,天津300308

出　　处：《光子学报》2023年第4期273-280,共8页Acta Photonica Sinica

基　　金：军委科技委基金(No.2022JCJQLB055XXX)。

摘　　要：依据雪崩光电二极管(APD)产品数据手册中雪崩增益、噪声(温度)与偏压的相关关系通过曲线拟合建立了APD输入、输出和偏压控制的函数模型,并基于非线性相关源控件构建了APD的电路仿真模型。设计了具有恒虚警APD偏压自动控制以及防近程散射时间增益控制的测距电路,引入自动增益控制信号,完成了恒虚警激光测距电路的全闭环动态仿真试验研究。仿真结果表明,恒虚警测距电路可根据虚警率设计值自动捕捉APD最佳雪崩增益工作偏压,虚警率每百毫秒60~70次时最小可探测光功率达到25 nW,与实际值接近,验证了恒虚警全闭环仿真模型的可行性。Avalanche Photodiode(APD),with its advantages of small size,fast speed,and high sensitivity,stands out from a large number of photoelectric detection devices and is widely used in pulsed laser ranging reception.In the field of engineering practice and academic research,reasonable modeling of APD devices and full closed loop simulation of Constant False Alarm Rate(CFAR)laser ranging receiving circuit using this model can greatly improve system design efficiency,reduce research and development costs,which is of great significance to the performance evaluation of laser ranging receiving system.At present,many institutions at domestic and abroad have established a variety of APD circuit simulation models.Most of these models are based on the carrier rate equation.After proper and reasonable approximation,the APD is equivalent to a three terminal circuit composed entirely of electronic components through mathematical simulation.However,the establishment of these models is based on devices′internal parameters and material properties,involving intellectual property rights,trade secrets and other reasons,which are usually not provided by manufacturers.Therefore,these models are suitable for the research and development process of devices,and not for the full closed loop dynamic simulation of CFAR laser ranging circuit.On the market,APD device manufacturers often only disclose the external characteristics of the device,which makes the existing models difficult to use effectively in the actual scientific research work.Therefore,how to use the limited device parameters to explore new modeling methods,carry out mathematical modeling and circuit packaging for external characteristic parameters,establish the APD circuit simulation model,and realize the full closed loop dynamic simulation of CFAR laser ranging circuit is still a problem to be solved.In this paper,an avalanche tube model based on a nonlinear correlation source is established to solve the above problems,and the full closed loop simulation test of CFAR laser ran

关 键 词：雪崩光电二极管 非线性相关源 恒虚警激光测距 全闭环仿真 近程误测 

分 类 号：TN215[电子电信—物理电子学]