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Dynamic spot tracking system based on 2D galvanometer in free space optical communication for short distance

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Abstract

Dynamic tracking of laser spot is a key process in the establishment of free space optical communication. In this paper, a dynamic tracking system was presented. In this system, a two-dimensional (2D) galvanometer was used to change the angle of the optical axis of the incident beam at a certain scanning frequency as optical signal jitter simulator, and another galvanometer was used to track the jitter with quadrant detector (QD) and data processing module to acquire the position information of laser spot. Results indicated that the tracking accuracy of this system mainly composed of 2D galvanometer was as high as 27.8 μrad, and its linear deviation was less than 0.013. The system could still keep the dynamic tracking of the spot stable when the jitter frequency of the optical signal was less than 1000 Hz. Those results suggested that this system could be suitable for the short distance in free space communication due to its simple structure, easy to control and low cost compared with conventional system.

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DOI:10.1007/s12200-016-0638-8

所属栏目:RESEARCH ARTICLE

基金项目:This work wassupported by the National NaturalScience Foundation of China (Grant Nos. 61475058 and 11104094), WuhanScience And Technology Project (No. 2015010101010001), Shenzhen BasicResearch Project (No. JCYJ20140419131733980), and the Open Fund of TheState Key Laboratory of High Performance Complex Manufacturing (No.Kfkt2013-07).

收稿日期:2016-03-15

修改稿日期:2016-05-26

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作者单位    点击查看

Qingshan JIANG:School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
Ciling ZENG:State Grid Hunan Electric Power Company, Changsha 410007, China
Fengqiang GU:Beijing Kedong Power Control System Co Ltd, Beijing 100192, China
Ming ZHAO:School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

联系人作者:Ming ZHAO(zhaoming@hust.edu.cn)

备注:Qingshan Jiang received his B.S. degree in 2013 from the Wuhan University of Science and Technology, Wuhan, China. He is currently studying for master's degree in Huazhong University of Science and Technology, Wuhan, China. His main research interests include photoelectric detection and tracking system in optical wireless communication.

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引用该论文

Qingshan JIANG,Ciling ZENG,Fengqiang GU,Ming ZHAO. Dynamic spot tracking system based on 2D galvanometer in free space optical communication for short distance[J]. Frontiers of Optoelectronics, 2017, 10(2): 174-179

Qingshan JIANG,Ciling ZENG,Fengqiang GU,Ming ZHAO. Dynamic spot tracking system based on 2D galvanometer in free space optical communication for short distance[J]. Frontiers of Optoelectronics, 2017, 10(2): 174-179

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