光学星间链路技术

Optical inter-satellite links technique

通过卫星间直接通信实现数据中继是空间通信技术发展的一个重要方面。光学星间链路与传统的微波链路相比具有重量轻、体积小、功耗低等诸多优点,但在捕获和跟踪等方面也存在着巨大的困难。描述了光学星间链路的系统结构极其关键技术,包括通信收发机、捕获与跟踪、光源与探测器以及空间应用的一些特殊问题。介绍了国际上几个主要研究计划的进展情况,并对光学星间链路的发展前景进行了综述。

Direct communication between satellites for data relay is an important aspect in free space communication technique progress. Optical intersatellite links have the advantages of light weight, small size and low power consumption. There are, however, formidable problems in acquisition and tracking system. The construction of the optical intersatellite links and key techniques are discussed, such as transmitter and receiver, acquisition and tracking system, laser and detectors, and some special problems in space environment. The condition of the programs in the world is presented and the prospect of optical intersatellite links is reviewed.