Experimental research on vibration influence and compensation of space light to fiber coupling efficiency
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摘要: 利用现有成熟光纤通信技术是目前卫星光通信技术的重要发展方向，但需首先解决空间光-光纤耦合这一关键问题。文中对卫星平台振动对空间光-光纤耦合效率的影响进行了理论分析；在此基础上针对卫星光通信终端，建立以CCD 为探测器，高速偏转镜为补偿器件的卫星平台微振补偿系统，并进行了实验研究。实验结果表明：所采用的基于反馈控制技术的主动补偿系统能有效地抑制低频振动。在振动频率介于1～50 Hz，振动幅度介于75～300 rad 之间时，补偿系统对耦合效率的最大改善率可达54.73%，验证了补偿方案的可行性及有效性，为在卫星光通信系统中应用各种光纤通信技术打下基础。Abstract: Utilizing the existing mature technologies of fiber-optic communication is an important development direction of the present satellite optical communication technology, but the critical issue of how to couple the space light into the fiber must be resolved. A theoretical analysis of the influence caused by the vibration of satellites on the coupling efficiency of space light into fiber was conducted. On this basis, using CCD as a detector and fine steering mirror as a compensation facility, a vibration compensation system of satellite optical communication terminal was established and an experimental study was conducted. The experimental results show that the active compensation system based on the feedback control technology suppresses low frequency vibration efficiently. When the vibration frequency ranges from 1 to 50 Hz and the vibration amplitude ranges from 75 to 300 rad, the maximum improving of coupling efficiency brought by the compensation system is up to 54.73% . The results verify the feasibility and effectiveness of the compensation system established in this paper, and lay a foundation for the using of the various fiber components in the satellite optical communication system.
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