深空辐射条件下EDFA波分复用性能研究

Research on EDFA Wavelength Division Multiplexing Performance under Deep Space Radiation

随着对空间试验卫星光通信系统数据容量需求的逐年增加,空间波分复用技术将成为拓展通信容量的有效手段,需要研究掺铒光纤放大器(Erbium Doped Fiber Amplifier,EDFA)波分复用特性在深空辐射条件下的性能变化情况。研究了深空辐射及温度场对EDFA的性能影响、非均匀特性,建立了深空辐射条件下EDFA的波分复用(Wavelength Division Multiplexing,WDM)技术信号之间的增益影响模型,给出了增益的非均匀变化影响的评估方法。并分别采用电子和中子作为辐射源,进行了地面模拟深空辐射环境的辐射电离效应和辐射位移效应实验,实验结果进一步验证了该模型正确性。利用该模型,可获得深空辐射环境中,不同辐射类型、不同温度下,EDFA在WDM应用时各波长增益的非均匀特性,可为深空光通信中EDFA的WDM应用提供参考。

With the increasing demand for data capacity of deep space laser communication systems,the wavelength division multiplexing(WDM)technology will become an effective method to expand communication capacity.It is necessary to study the performance variation of EDFA WDM characteristics under deep space radiation conditions.The effects of deep space radiation and temperature field on the performance of EDFA,non-uniform characteristics are analyzed,and the gain influence model between EDFA WDM signals under deep space radiation conditions are established,and the evaluation method of the influence of nonuniform variation of gain is given.Deep space radiation environment was simulated,and the electron irradiation and neutron irradiation were used as radiation sources to simulate the effects of radiation ionization and radiation displacement,respectively.The correctness of the model is verified by experimental results.Using this model,the non-uniform characteristics of the gain of each wavelength of EDFA in WDM application under different types of radiation and different temperatures in deep-space radiation environment can be obtained,providing reference for WDM application of EDFA in deep space laser communication.