激光通信地面测试终端间隔离度的仿真分析

赵猛; 颜昌翔; 吴从均

doi:10.3788/CO.2019-0154

Volume 13 Issue 3

Jun. 2020

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Chinese Optics > 2020 > 13(3): 472-481.

ZHAO Meng, YAN Chang-xiang, WU Cong-jun. Simulation analysis of isolation between laser communication ground test equipments[J]. Chinese Optics, 2020, 13(3): 472-481. doi: 10.3788/CO.2019-0154

Citation:

ZHAO Meng, YAN Chang-xiang, WU Cong-jun. Simulation analysis of isolation between laser communication ground test equipments[J]. Chinese Optics, 2020, 13(3): 472-481. doi: 10.3788/CO.2019-0154

ZHAO Meng, YAN Chang-xiang, WU Cong-jun. Simulation analysis of isolation between laser communication ground test equipments[J]. Chinese Optics, 2020, 13(3): 472-481. doi: 10.3788/CO.2019-0154

Citation:

ZHAO Meng, YAN Chang-xiang, WU Cong-jun. Simulation analysis of isolation between laser communication ground test equipments[J]. Chinese Optics, 2020, 13(3): 472-481. doi: 10.3788/CO.2019-0154

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Simulation analysis of isolation between laser communication ground test equipments

doi: 10.3788/CO.2019-0154

ZHAO Meng^{1, 2
,},
YAN Chang-xiang^{1, 3
,},
WU Cong-jun^{1
,
,}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Center of Materials Science and Optoelectrics Engineering, University of Chinese Academy of Science, Beijing 100049, China

Funds: Supported by National Natural Science Foundation of China (No. 61805235)

More Information

Corresponding author: wucongjun789@163.com
Received Date: 23 Jul 2019
Rev Recd Date: 20 Aug 2019
Publish Date: 01 Jun 2020

Abstract

Abstract

The distance between a laser communication ground test platform and the terminal under test is far less than the actual communication distance due to space limitations. As a result, the backscattered stray light generated by the test platform optical device will enter the terminal under test, and the signal will seriously affect the performance of the terminal under test. Aiming at this problem, we research the isolation relationship between the tested terminal and the test platform based on the optical interference problem. The Cassegrain and off-axis three-mirror optical antenna are designed respectively. According to astigmatic transmission model, the stray light analysis software is employed to analyze the influence of optical antenna's structure and surface roughness on the isolation. The results of the analysis show that the isolation when applying the off-axis three-mirror optical antenna is significantly higher than that applying the Cassegrain optical antenna, and that this isolation increases with a decrease in the roughness of the optical surface. When the optical surface's roughness reaches 0.892 nm, the isolation is −86.22 dB. Finally, the relationship between the ABg model and the Harvey model parameters is derived. According to calculation formula of the roughness and TIS, the ABg model parameters with roughness of 0.7 nm and 0.5 nm are theoretically obtained. The isolation between the terminals is −94.39 dB and −97.3 dB, achieving an isolation rating of −90 dB.
- laser communication,
- optical antenna,
- isolation,
- surface scattering model,
- stray light

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References(14)

References

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