Suppression research of arrival angle for free space optical communication

Ming-fu Zhao

doi:10.1117/12.904106

15 November 2011 Suppression research of arrival angle for free space optical communication

Ming-fu Zhao

Proceedings Volume 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation; 83211C (2011) https://doi.org/10.1117/12.904106
Event: Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 2011, Yunnan, China

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.

Citation Download Citation

Ming-fu Zhao "Suppression research of arrival angle for free space optical communication", Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211C (15 November 2011); https://doi.org/10.1117/12.904106

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