空间电荷效应对雪崩光电二极管增益影响的研究  

Study on the Impact of Space Charge Effect to Avalanche Photodiode Gain

作　　者：王燊 曾朝阳 张飞 

机构地区：[1]装备学院研究生管理大队,北京101416 [2]装备学院光电装备系,北京101416

出　　处：《激光与光电子学进展》2015年第6期69-73,共5页Laser & Optoelectronics Progress

摘　　要：雪崩光电二极管(APD)可以作为调频连续波(FMCW)激光雷达的光电探测器并同时实现混频功能,其光电混频技术是制约FMCW激光雷达接收与处理技术中自混频性能的核心问题之一。APD在实现光电混频的过程中,空间电荷效应会对其增益产生一定的影响。基于APD经验增益模型和空间电荷的理论分析,对原增益模型进行了改进。通过实验研究证明改进增益模型的正确性,由此论证了APD在强光照条件下,APD增益受空间电荷电阻、串联负载电阻和总电流的影响,从而确定了APD作为FMCW激光雷达光电探测器时其混频性能的影响因素。Avalanche photodiode （APD） is the photoelectric detector of frequency modulated continuous wave （FMCW） radar and can realize mixing functions, its self-mixing technology involved in signal receiving and processing of FMCW radar is one of the core problem restricting its performance. In the process of achieving photoelectric mixing, the space charge effect have an impact on APD gain. On the basis of APD empirical gain model and theoretical analysis of space charge effect, an improvement is implemented to the original model. Experimental studies have demonstrated that the improved APD gain model is correct and the APD gain can be affected by space charge resistance, series load resistance and total current in the situation of strong light. Thereby the influencing factors of APD mixing performance as the photoelectric detector in FMCW laser radar are confirmed.

关 键 词：探测器 调频连续波激光雷达 改进增益模型 空间电荷效应 雪崩光电二极管 

分 类 号：TN958.94[电子电信—信号与信息处理]