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Intersatellite laser crosslinks

机译：卫星间激光交联

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摘要

Intersatellite laser crosslinks (ISL) provide a method of communication that has significantly increased the data throughput that can be managed over typical RF communication systems, and has significant growth potential. Optical communications offer very wide bandwidths which can be effectively utilized with wavelength division multiplexing techniques. The data rate growth potential is well beyond the few gigabit per second range of RF technology. The use of lasers in transmitting optical data takes advantage of its small wavelength and low beam divergence to send highly directed signals over significant distances with controlled losses in intensity. The high directivity of the laser aids in resistance to jamming communications between satellites, or between satellites and ground stations. Various intersatellite laser optical crosslink system are discussed including the Massachusetts Institute of Technology's Laser Intersatellite Transmission Experiment (LITE), the McDonnell Douglas Electronic Systems Company Laser Crosslink System, and The Ball Aerospace Optical Intersatellite Link,in order to display the various subsystem and their implementations. Link budget calculations are performed on the most commonly used modulation formats to determine system parameters necessary to close the crosslink. Background is provided on primal system architectures and methods of laser communication, as well as presently implemented systems. The authors provide some insights on where ISL systems have opportunity to increase their data throughput and reduce acquisition time
机译：卫星间激光交叉链接（ISL）提供了一种通信方法，该方法大大提高了可以通过典型RF通信系统进行管理的数据吞吐量，并且具有巨大的增长潜力。光通信提供了非常宽的带宽，可以与波分复用技术一起有效利用。数据速率的增长潜力远远超出了射频技术每秒几千兆比特的范围。激光在传输光学数据中的使用利用了其小波长和低光束发散的优势，可以在很长的距离上发送高度定向的信号，并且可以控制强度。激光的高方向性有助于抵抗卫星之间或卫星与地面站之间的干扰通信。讨论了各种卫星间激光光学交联系统，包括麻省理工学院的激光卫星间传输实验（LITE），麦克唐纳道格拉斯电子系统公司的激光交联系统和Ball Aerospace光学卫星间链路，以显示各种子系统及其实现。 。在最常用的调制格式上执行链路预算计算，以确定关闭交叉链路所需的系统参数。提供有关原始系统架构和激光通信方法以及当前实现的系统的背景技术。作者提供了有关ISL系统在哪里有机会增加其数据吞吐量和减少采集时间的一些见解。

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