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New trends in laser satellite communications: design and limitations

机译：激光卫星通信的新趋势：设计和局限性

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摘要

Optical communications offer a capable alternative to radio frequency (RF) communications for applications where high data-rate is required. This technology is particularly promising and challenging in the field of future inter-satellite communications. The term laser satellite communications (LSC) stands for optical links between satellites and/or high altitude platforms (HAPs). However, optical links between an earth station and a satellite or HAPs can be also involved. This work gives an overview of nowadays laser satellite communications. Particularly, it is focused on the factors causing degradation of the optical beam in the atmosphere. If an optical link passes through the atmosphere, it suffers from various influences such as attenuation due to absorption and scattering, intensity fluctuations due to atmospheric turbulence and background radiation. Furthermore, platform vibrations cause mispointing and following tracking losses. Suitable devices and used pointing and tracking system for laser satellite communications are discussed. At the end, various scenarios of the optical links and calculations of their power link budgets and limitations are designed. Implemented software is used for calculation of optical links. This work proves that the Free Space Optics (FSO) systems on mobile platforms, like satellites and HAPs are a promising solution for future communication networks.
机译：对于需要高数据速率的应用，光通信为射频（RF）通信提供了一种有力的替代方法。在未来的卫星间通信领域中，这项技术特别有希望和挑战。术语激光卫星通信（LSC）代表卫星和/或高海拔平台（HAP）之间的光链路。但是，也可能涉及地球站与卫星或HAP之间的光链路。这项工作概述了当今的激光卫星通信。特别地，其重点在于引起大气中光束劣化的因素。如果光链路通过大气，则会受到各种影响，例如由于吸收和散射引起的衰减，由于大气湍流和背景辐射引起的强度波动。此外，平台振动会导致指向错误和跟踪损失。讨论了用于激光卫星通信的合适设备和使用的指向和跟踪系统。最后，设计了光链路的各种场景以及它们的功率链路预算和限制的计算。已实现的软件用于计算光链路。这项工作证明了卫星和HAP等移动平台上的自由空间光学（FSO）系统是未来通信网络的有希望的解决方案。

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  • 来源
    《Photonics, devices, and systems IV》|2008年|71382I.1-71382I.6|共6页
  • 会议地点 Prague(CS)
  • 作者

    J. Cisar; O. Wilferr; F. Fanjul-Velez; N. Ortega-Quijano; J. L. Arce-Diego;

  • 作者单位

    Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Purkynova 118, CZ- 61200 Brno, Czech Republic;

    Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Purkynova 118, CZ- 61200 Brno, Czech Republic;

    Applied Optical Techniques Group, Electronics Technology, Systems and Automation Engineering Department, University of Cantabria, Av. de los Castros S/N, E-39005 Santander (Cantabria), Spain;

    Applied Optical Techniques Group, Electronics Technology, Systems and Automation Engineering Department, University of Cantabria, Av. de los Castros S/N, E-39005 Santander (Cantabria), Spain;

    Applied Optical Techniques Group, Electronics Technology, Systems and Automation Engineering;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程光学;
  • 关键词

    laser satellite communications; high altitude platforms; optical inter-satellite links;

    机译：激光卫星通信；高空平台；卫星间光链路;

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