激光与光电子学进展, 2015, 52 (6): 060401, 网络出版: 2015-05-29  

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
作者单位
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
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。
Abstract
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.

王燊, 曾朝阳, 张飞. 空间电荷效应对雪崩光电二极管增益影响的研究[J]. 激光与光电子学进展, 2015, 52(6): 060401. Wang Shen, Zeng Zhaoyang, Zhang Fei. Study on the Impact of Space Charge Effect to Avalanche Photodiode Gain[J]. Laser & Optoelectronics Progress, 2015, 52(6): 060401.

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