摘要
为了研究影响四象限探测器(QD)在空间激光通信系统中的跟踪精度,以及光斑特性和外部环境对探测器的影响。首先理论推导了四象限探测器光斑检测的原理,然后对光斑半径、光斑位置、背景光、光斑能量分布、死区、系统信噪比等因素进行了仿真分析。研究结果表明,光斑半径的增加会降低四象限探测器的位置探测灵敏度。光斑能量分布、背景光和死区会对光斑位置检测精度产生影响,系统信噪比的提高可以提高位置检测精度。
In order to study the tracking accuracy of four-quadrant(QD)detectors in space laser communication systems and the effects of spot characteristics and external environment on detectors,at first,the principle of four-quadrant detector flare detection is deduced through the theory,the effects of facula size,facula centroid position,background light,facula energy distribution,dead-area and the SNR are simulated and analyzed.The results show that the sensitivity of the position detection is reduced with the increase of the facular size.The facula energy distribution,background light and dead-area will have an effect on the detection accuracy of the spot position;and the improvement of the signal-to-noise ratio can improve the position detection accuracy.
作者
宋哲宇
付芸
范新坤
吴凯
SONG Zheyu;FU Yun;FAN Xinkun;WU Kai(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022)
出处
《长春理工大学学报（自然科学版）》
2018年第2期41-44,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
吉林省科技厅重点科技攻关项目(20170204015GX)
关键词
背景光
光通信
建模
仿真
信噪比
background light
optical communication
modeling
simulation
signal noise ratio
作者简介
宋哲宇(1992-),男,硕士研究生,E-mail:77630593@qq.com;通讯简介:付芸(1971-),女,副教授,博士,E-mail:linda_fy@cust.edu.cn
