中国激光, 2012, 39 (4): 0414003, 网络出版: 2012-03-17   

盖革模式雪崩光电二极管激光雷达累积探测性能的研究 下载: 519次

Research on the Detection Performance of Geiger-Mode APD Laser Radar with Accumulated Detection
作者单位
哈尔滨工业大学物理系, 黑龙江 哈尔滨 150001
摘要
利用单个盖革模式雪崩光电二极管(Gm-APD)对单脉冲测距的激光雷达探测性能进行了研究。从Gm-APD进行单光子探测的模型出发,研究长死时间情况下,单脉冲多次累积探测的探测概率(PD)和虚警概率(PFA)。研究目标区间在选通门中的位置及平均信号光电子数的变化对PD、PFA的影响;对不同次数累积探测下的PD、PFA做了比较和分析。理论研究和数值计算结果表明,累积探测能够提高探测性能,增加累积次数到3次,就可以非常明显地提高探测性能;控制好选通门的开启时间,可以明显提高探测性能;在接收一个激光脉冲时,只需产生4个光电子数就可以使探测性能基本达到最佳。
Abstract
The detection performance of range detection laser radar which uses a single Geiger-mode avalenche photodiode (Gm-APD) with single-pulse is reported. Based on the model of single photon detection with a Gm-APD, research on the detection and false alarm probabilities (PD and PFA) with accumulated single-pulse detection at long dead-time is done. Research on the influence on PD and PFA is done, when the location of target bin in the strobe gate and the mean signal photoelectrons vary. The PD and PFA under different numbers of accumulated detection are compared and analyzed. Theory and numerical results show that accumulated detection can improve the detection performance, and when the accumulated number increases to three times, the detection performance can be very significantly improved; good control of the opening time of the strobe gate can significantly improve the detection performance; when Gm-APD receives a laser pulse, only four photoelectrons can make the detection performance best.
参考文献

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徐璐, 张宇, 张勇, 赵远. 盖革模式雪崩光电二极管激光雷达累积探测性能的研究[J]. 中国激光, 2012, 39(4): 0414003. Xu Lu, Zhang Yu, Zhang Yong, Zhao Yuan. Research on the Detection Performance of Geiger-Mode APD Laser Radar with Accumulated Detection[J]. Chinese Journal of Lasers, 2012, 39(4): 0414003.

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