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Proceedings Paper

Suppression research of arrival angle for free space optical communication
Author(s): Yang Cao; Ming-fu Zhao
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Paper Abstract

Free space optical communication systems have been used not only in the space communication link but also in the terrestrial long-distance network, because channel transmission medium of communication is atmosphere, atmospheric pressure and temperature vary randomly, which cause fluctuation of arrival angle, APT (Acquisition、 Pointing and Tracking) technology makes the communication terminals aim each other accurately, fine tracking is the core component of APT system. In order to assure success of the communication link, the fine tracking system requires tracking accuracy of sub-micro radian to mitigate the effect of arrival angle for communication beam. In the paper, the construction and working principle of fine tracking system based on FPGA are introduced and analyzed, a novel adaptive fuzzy network algorithm is introduced, the weights of PID parameters can be adjusted on real time. In the terrestrial 16km free space optical data link, efficiency of fiber coupling is enhanced obviously, the tracking precision reaches submicro radian level, the experiment is demonstrated successfully, and the experimental results show the system is robust.

Paper Details

Date Published: 16 November 2011
PDF: 5 pages
Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211C (16 November 2011); doi: 10.1117/12.904106
Show Author Affiliations
Yang Cao, Chongqing Univ. of Technology (China)
Ming-fu Zhao, Chongqing Univ. of Technology (China)


Published in SPIE Proceedings Vol. 8321:
Seventh International Symposium on Precision Engineering Measurements and Instrumentation
Kuang-Chao Fan; Man Song; Rong-Sheng Lu, Editor(s)

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