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Overview of deep space laser communication

Science China(Information Sciences) 2018年第4期61卷 7-18页

作者： Weiren WU Ming CHEN Zhe ZHANG Xiangnan LIU Yuhui DONG School of Aerospace Engineering Beijing Institute of Technology Beijing Research Institute of Telemetry

The deep space probe is a vital technology for observing and exploring the universe. It is thus intensifying as an aerospace research focus on an international scale. Despite improving the frequency band,the conventional microwave communication technique has difficulty satisfying the increased demand for the enormous volume of scientific data returning to the Earth. With a carrier frequency that is several orders of magnitude higher than the microwave, free-space optical communication is a robust and promising method for achieving both high bit rates and long distances in deep space communication. In this article, the history of this technology is summarized and the objective laws are formulated, while key techniques and development trends are analyzed. Finally, useful concepts and suggestions are proposed for the development of deep space laser communication in China.

关键词： deep space communication deep space observation development process free space communication laser communication

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Airborne space laser communication system and Experiments

Airborne space laser communication system and Experiments

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国防光电子论坛空间光信息与组网技术及应用研讨会

作者： LIXiao-ming ZHANGLi-zhong MENGLi-xin National and Local Joint Engineering Research Center of Space Optoelectronics Technology of CUST School of photoelectric engineering Changchun University of science and technology

Airborne space laser communication is characterized by its high speed, anti-electromagnetic interference, security, easy to assign. It has broad application in the areas of integrated space-ground communication networking, military communication, anti-electromagnetic communication. This paper introduce the component and APT system of the airborne laser communication system design by Changchun university of science and technology base on characteristic of airborne laser communication and Y12 plan, especially introduce the high communication speed and long distance communication experiment of the system that among two Y12 plans. In the experiment got the aim that the max communication distance 144 Km, error 97%, average capture time 20 s. The experiment proving the adaptability of the APT and the high speed long distance communication.

关键词： laser communication plan platform APT

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Study on Satellite-to-ground laser communications with Existence of Atmosphere

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空间科学学报 2021年第3期41卷 505-510页

作者： LI Hu HU Tai SHAO Shiyong WU Pengfei National Space Science Center Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei 230031

The laser beam used to establish a communication channel between satellite and ground segments has a small divergence angle and a tiny spot on the Earth's surface,which may lead to the fail of the *** it's important to study the deflection of laser beam by the Earth's atmosphere and find a way to calibrate this *** theoretical analysis and real data processing method are used to obtain the mathematical model for divergence angle of laser communication beam and its correction *** the model has been applied to the data,which was used to describe the atmosphere state by traditional ground segments to obtain the critical elevation *** to the results of calculation,our conclusion will be that the correction should be done when the critical elevation happens.

关键词： Atmospheric deflection laser communication Satellite-to-ground Correction

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