Mr. Su Chen Profile

Su Chen

at Xi'an Institute of Optics And Precision Mechanics

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Proceedings Article | 5 November 2020 Paper

Stray light suppression of common aperture optical antenna for laser communication system

Jing Wang, Xinrong Hu, Su Chen, Huanhuan Zhang, Enshi Qu, Liyong Ren

Proceedings Volume 11570, 1157006 (2020) https://doi.org/10.1117/12.2575985

KEYWORDS: Stray light, Optical antennas, Mirrors, Telecommunications, Laser communications, Off axis mirrors

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The laser communication system with polarized beam splitting is a useful method for interstellar networking. In longdistance communication terminals which adopts a system of common aperture same frequency transmitting-receiving, the stray light comes from the inside system is generated by retroreflectance and scattering, which will cause interference to the reception of signal light. The ability of internal stray light suppression is the main factor restricting the output power of the system signal and the distance of communication chain-establishment. The optical antenna as the key component of the common channel, coaxial optical antennas are replaced by off-axis optical antennas to reduce paraxial stray light. This work designed miniaturized off-axis optical antenna with a large field of view, and combined the YNI factor to analyze the factors affecting the internal stray light. The proportion of stray light generated on each surface was determined through surface modeling and simulation in Tracepro, and the optical antenna was actually tested by constructing optical path. The test result 71dB is close to the simulation result73dB. It indicates that the off-axis angle and YNI factor can be used to characterize the isolation indicator of optical antenna. We believe this work is of great significance for guiding the rapid design and indicator analysis of the system, meanwhile provides reference for other systems of stray light suppression.

Proceedings Article | 24 October 2017 Paper

Design and analysis of push-broom optical camera's following windows

Su Chen, Hu Wang, Yaoke Xue, Meiying Liu, Lingguang Wang

Proceedings Volume 10463, 1046313 (2017) https://doi.org/10.1117/12.2284267

KEYWORDS: Cameras, Kinematics

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In order to solve the problem of push-broom optical camera’s imagery quality difficult to content request which windows size is too large, the author proposed a kind of project for camera’s following windows. The author analysed the characteristic of the push-broom optical camera’s windows, and proposed the ideal model of the push-broom optical camera’s windows. Simultaneously, analyzed the transformational rule of the windows’ location and size in the ideal condition. The author proposed the design project of the push-broom optical camera’s following windows according to the result of the ideal windows’ analysis, and performed an analysis of kinematics simultaneously. Finally, the author designed and analyzed kinematics for the following windows in allusion to a certain push-broom optical camera. According the analysis result, this project could decrease a half size of the light opening area compare with the current technique. It could decrease the stray light’s influence of the camera’s imagery quality, the following windows move smoothly, and this project could be satisfied to the requirements of engineering use.

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