基于激光章动的空间光到单模光纤的耦合方法

高建秋; 孙建锋; 李佳蔚; 朱韧; 侯培培; 陈卫标

doi:doi:10.3788/cjl201643.0801001

中国激光, 2016, 43 (8): 0801001, 网络出版: 2016-08-10

基于激光章动的空间光到单模光纤的耦合方法下载： 742次

Coupling Method for Making Space Light into Single-Mode Fiber Based on Laser Nutation

论文大纲

高建秋 ^1,2,3,*孙建锋 ¹李佳蔚 ^1,2朱韧 ¹侯培培 ¹陈卫标 ^1,3

作者单位

¹ 中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室, 上海 201800

² 中国科学院大学, 北京 100049

³ 上海科技大学物质科学与技术学院, 上海 200120

光通信光纤耦合指向误差激光章动数据采集卡 optical communications fiber coupling pointing error laser nutation data acquisition card

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摘要

基于模场匹配原理，分析了耦合效率与抖动幅度、艾里斑半径和单模光纤模场半径比值的关系。为了减小随机角抖动对耦合效率的影响，提出了基于激光章动的空间光到单模光纤的自动耦合方案，利用数据采集卡算出脱靶量并输出补偿电压。分析了算法精度的影响因素、激光章动信号频率与抖动频率的关系，用Matlab仿真及实验验证了算法的可行性。实验得到脱靶量角度精度约为3 μrad，结合空间激光通信系统验证了系统的可行性。没有扰动时系统的耦合效率为67%；引入扰动并用控制系统进行扰动补偿后，系统的耦合效率提高了6.5%，响应速度为40 Hz。耦合系统结构简单，控制算法精度高，控制器信号处理速度快，对空间光到单模光纤的耦合具有重要意义。

Abstract

Based on the theory of mode-field matching, the relationship between coupling efficiency and jitter amplitude, radius ratio of Airy disk and single-mode fiber mode field is analyzed. In order to reduce the effect of random angle jitter on coupling efficiency, an automatic coupling scheme for making space light into single-mode fiber based on laser nutation is designed. The miss distance is calculated by data acquisition card and the offset voltage is output. The influence factors of algrithm precision and the relationship between laser nutation signal frequency and jitter frequency are analyzed. The feasibility of the algorithm is verified by Matlab simulation and experiments. Accuracy of miss distance angle is about 3 μrad obtained by experiment. The system feasibility is verified by space laser communication system. The coupling efficiency of the system is 67% when there is no disturbance, and it is improved by 6.5% when the disturbance is introduced and the control system is used to compensate the disturbance. The system response speed reaches 40 Hz. The coupling system is simple in structure and accurate in control algorithm. The controller signal processing speed is fast, and it has a great significance on the coupling of space light to single mode optical fiber.

参考文献

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高建秋, 孙建锋, 李佳蔚, 朱韧, 侯培培, 陈卫标. 基于激光章动的空间光到单模光纤的耦合方法[J]. 中国激光, 2016, 43(8): 0801001. Gao Jianqiu, Sun Jianfeng, Li Jiawei, Zhu Ren, Hou Peipei, Chen Weibiao. Coupling Method for Making Space Light into Single-Mode Fiber Based on Laser Nutation[J]. Chinese Journal of Lasers, 2016, 43(8): 0801001.

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