自由空间激光通信四象限探测器性能研究

韩成; 白宝兴; 杨华民; 佟首峰; 姜会林; 范静涛

中国激光, 2009, 36 (8): 2030, 网络出版: 2009-08-13

自由空间激光通信四象限探测器性能研究下载： 540次

Study Four-Quadrant Detector in the Free Space Laser Communication

论文大纲

韩成 ^1,2,*白宝兴 ¹杨华民 ^1,2佟首峰 ²姜会林 ²范静涛 ^1,2

作者单位

¹ 长春理工大学计算机科学技术学院, 吉林长春 130022

² 长春理工大学光电测控与光信息传输技术教育部重点实验室, 吉林长春 130022

摘要

在自由空间激光通信中, 精跟踪单元的探测器经常选用四象限探测器(QD), 探测器的性能影响跟踪精度。为了研究四象限探测器在不同条件下的性能, 提出变步长的方法, 分析光斑大小对动态范围和探测灵敏度的影响情况, 在满足仿真精度的前提下, 缩短了仿真时间。在光斑能量服从高斯分布的情况下, 分析背景光、光电响应度和死区对动态范围和探测灵敏度的影响, 特别研究非均匀背景光的影响。结果表明, 随着光斑半径的增加, 光斑位置检测的动态范围在增大, 位置探测灵敏度在降低。相同光斑半径条件下, 对于服从艾里分布的光斑的位置探测灵敏度高于服从高斯分布的光斑, 而动态范围小于后者, 非均匀背景光对探测器性能的影响比均匀背景的影响大。

Abstract

Four-quadrant detector (QD) is used for detector of extract track in free space optical communication, and influences tracking precision. The method of the variable step-size is given, and the influences of the facular size to the dynamic range and the detection sensitivity are analyzed. As the simulation precision is satisfied, simulation time is shortened. On the condition that the facular energy obeys the Gauss distribution, the influences of the background light, responsibility and dead-area to the dynamic range and the detection sensitivity are analyzed, especially the influence of the non-uniformity background light is analyzed. The result indicates that the dynamic range of facular position detection is increased, and detection sensitivity is reduced with the increase of the facular size. On the condition of the same facular size, the detection sensitivity as to obey Airy distribution is higher than Gauss distribution, the influence of non-uniformity to the detector is larger than uniformity.

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韩成, 白宝兴, 杨华民, 佟首峰, 姜会林, 范静涛. 自由空间激光通信四象限探测器性能研究[J]. 中国激光, 2009, 36(8): 2030. Han Cheng, Bai Baoxing, Yang Huamin, Tong Shoufeng, Jiang Huilin, Fan Jingtao. Study Four-Quadrant Detector in the Free Space Laser Communication[J]. Chinese Journal of Lasers, 2009, 36(8): 2030.

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