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Proceedings Paper

Research on the efficiency of coherent balanced detection
Author(s): Hongyang Liu; Yong Ai; Xiaobo Yang; Yang Chen; Fengzhu Ji; Xiaodan Zhao
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Paper Abstract

In the spatial coherent optical communication, after long distance transmission, the receiver needs to detect and extract the weak signal, and the balanced detection technology is the key technology in the coherent detection. Using balanced detection technology, not only can further improve the receiving sensitivity of coherent optical detection, but also can suppress the common mode intensity noise, so as to improve the output signal to noise ratio of the system. But the problems are (1) due to external causes (polarization control, input optical power loss error, atmospheric turbulence caused by decay, and so on),at both ends of the balanced detector’s input signal can not keep consistent (2) two arms of balanced detector electronic devices (including photodiode and amplifier electronic components) are difficult to achieve perfectly matched. The paper is based on the principle of coherent optical detection, firstly, the advantage of balanced detection compared to single detection is detailed analysis, it is shown that balanced detector used in coherent optical communication system and with the improvement of communication rate, this advantage will more obvious. The theoretical and experimental results have verified several important factors that affect the efficiency of coherent balanced detection, namely, the consistency of the detection response, the atmospheric turbulence and the tracking jitter. It is of reference significant to study the balance detection technology in the spatial coherent optical communication.

Paper Details

Date Published: 19 October 2016
PDF: 9 pages
Proc. SPIE 10153, Advanced Laser Manufacturing Technology, 1015312 (19 October 2016); doi: 10.1117/12.2247243
Show Author Affiliations
Hongyang Liu, Xichang Satellite Launch Ctr. (China)
Yong Ai, Wuhan Univ. (China)
Xiaobo Yang, Xichang Satellite Launch Ctr. (Chile)
Yang Chen, Xichang Satellite Launch Ctr. (China)
Fengzhu Ji, Xichang Satellite Launch Ctr. (China)
Xiaodan Zhao, Xichang Satellite Launch Ctr. (China)

Published in SPIE Proceedings Vol. 10153:
Advanced Laser Manufacturing Technology
Bingheng Lu; Huaming Wang, Editor(s)

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