Feature of spaceborne laser communication telescope isolation

Dong-liang Shi; Rui-min Fu; Jian-feng Liu; Bin Hu

doi:10.1117/12.2579659

5 November 2020 Feature of spaceborne laser communication telescope isolation

Dong-liang Shi, Rui-min Fu, Jian-feng Liu, Bin Hu

Proceedings Volume 11562, AOPC 2020: Advanced Laser Technology and Application; 115620R (2020) https://doi.org/10.1117/12.2579659
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

Spacebornelaser communication system utilize laser to transfer information, which can realize star to star, star to earth communication. It hasthe advantage of wide bandwidth, high anti-jamming capability, good secrecy performance, small size and weight, and lower power dissipation. Laser communication telescope, which is use for laser beam alignment, is the main part of spaceborne laser communication system to realize long distance transmission. As transmit-receive integration is the mainstream form of spaceborne laser communication system in current, isolation become a kernel index which determined the signal-to-noise ratio and transmission distance. Optical telescope of coaxial two-mirrorreflective structure and off-axis three mirror reflective structure were built, and stay light analysis was done on both kind of laser communication telescope to get the isolation. The results show that the isolation of coaxial two-mirror reflective optical telescope is 62dB and the isolation of off-axis three mirror optical telescope is 70dB. Furthermore, the results show that mirror scatter is the dominant influence factor of isolation. Through comparative analysis of two forms of optical system, under the same condition, off-axis three mirror optical telescope has a better performance in isolation.

Citation Download Citation

Dong-liang Shi, Rui-min Fu, Jian-feng Liu, and Bin Hu "Feature of spaceborne laser communication telescope isolation", Proc. SPIE 11562, AOPC 2020: Advanced Laser Technology and Application, 115620R (5 November 2020); https://doi.org/10.1117/12.2579659

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KEYWORDS

Mirrors

Telescopes

Laser communications

Off axis mirrors

Reflectivity

Optical telescopes

Reflector telescopes

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