星地激光通信可靠性保障技术研究现状

Research Status of Mitigation Techniques to Assure the Reliability of Satellite-to-Ground Laser Communications

激光通信具有宽带宽、高数据速率、低功耗的特点,是未来实现星地大数据量信息交互的重要手段之一。然而,激光传输深受大气吸收和散射、大气湍流、以及背景光等因素的影响,其可靠性受到一定的挑战。本文从原理研究、地面验证及在轨试验等方面梳理星地激光通信可靠性保障技术的研究现状,总结各主要研究国家的技术发展路线。分析表明,未来星地激光通信可靠性保障技术将在进一步完善基于单链路的可靠性保障方法的同时,开展基于网络的保障方法研究及在轨试验。各项可靠性保障技术的发展,将大幅提升星地激光通信效率,进而推动天地一体化信息网络的发展。

Featured with large bandwidth,high data rate and low power requirement,laser communications is one of the most important measures to achieve information interaction of big data.However,the reliability of laser communications is limited by various adverse effects,such as absorption,scattering, turbulence and ambient light.This review presents a comprehensive survey on the research status of the mitigation techniques involving principle study,terrestrial demonstration and in-orbit test.The analysis is concluded that the future mitigation techniques will be not only based on single links,but also on networks of satellites.The development of the mitigation techniques will greatly improve the efficiency of satellite-to-ground laser communications,and therefore promote the development of the integrated space and terrestrial information network.