具有模式依赖损耗的模分复用系统的动态信道补偿特性  

Dynamic Channel-Compensation Characteristics of MDM System with Mode-Dependent Loss

作　　者：龚思雨 张建勇[1] Gong Siyu;Zhang Jianyong(Institute of Light leave Technology,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学光波技术研究所,北京100044

出　　处：《光学学报》2020年第23期54-58,共5页Acta Optica Sinica

基　　金：国家自然科学基金面上项目(61671047)。

摘　　要：对具有模式依赖损耗(MDL)的光纤模分复用(MDM)传输系统进行仿真,同时考虑了MDL与突发干扰对系统性能的影响。分析MDL对4×4 MDM传输系统的影响,同时施加不同强度的快速干扰。采用自适应算法,即最小方均(LMS)算法和递归最小二乘(RLS)算法,进行快速信道补偿,使用方均误差(MSE)计算信道补偿算法的性能。仿真结果表明:MDL使系统性能下降;LMS和RLS算法均能补偿动态干扰对系统的影响,但MDL使补偿后的系统性能变动较大,即MSE的方差变化较大。In this work, we simulate a fiber mode-division multiplexing(MDM) transmission system with mode-dependent loss(MDL), and simultaneously explore the impact of MDL and burst perturbation on system performance. The impact of MDL on a 4×4 MDM transmission system is analyzed with fast perturbation of different intensities applied. Adaptive algorithms containing least mean square(LMS) and recursive least square(RLS) routines are used for fast channel compensation. The performance of these channel-compensation algorithms is calculated using mean square error(MSE). Simulation results show that MDL degrades system performance. Both LMS and RLS algorithms can compensate for the effects of dynamic perturbation on the system;however, MDL causes system performance to change greatly after compensation, i.e., the variance of MSE varies greatly.

关 键 词：光纤光学 模分复用 自适应算法 多模光纤 

分 类 号：TN911.5[电子电信—通信与信息系统]