Mr. Hongyang Liu Profile

Hongyang Liu

at Xichang Satellite Launch Center

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Publications (2)

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Proceedings Article | 25 October 2016 Paper

Research on key technology of space laser communication network

Chengwu Chang, Huiming Huang, Hongyang Liu, Shenghua Gao, Liyu Cheng

Proceedings Volume 10158, 1015816 (2016) https://doi.org/10.1117/12.2247253

KEYWORDS: Aerospace engineering, Laser communications, Laser applications

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Since the 21st century, Spatial laser communication has made a breakthrough development. Europe, the United States, Japan and other space powers have carried out the test of spatial laser communication technology on-orbit, and put forward a series of plans. In 2011, China made the first technology demonstration of satellite-ground laser communication carried by HY-2 satellite. Nowadays, in order to improve the transmission rate of spatial network, the topic of spatial laser communication network is becoming a research hotspot at home and abroad. This thesis, from the basic problem of spatial laser communication network to solve, analyzes the main difference between spatial network and ground network, which draws forth the key technology of spatial laser communication backbone network, and systematically introduces our research on aggregation, addressing, architecture of spatial network. From the perspective of technology development status and trends, the thesis proposes the development route of spatial laser communication network in stages. So as to provide reference about the development of spatial laser communication network in China.

Proceedings Article | 19 October 2016 Paper

Research on the efficiency of coherent balanced detection

Hongyang Liu, Yong Ai, Xiaobo Yang, Yang Chen, Fengzhu Ji, Xiaodan Zhao

Proceedings Volume 10153, 1015312 (2016) https://doi.org/10.1117/12.2247243

KEYWORDS: Optical communications, Sensors

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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.

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