模式群分集复用系统中发送端信号光入射条件的优化  

Parameters optimization for the incident signal light in MGDM systems

作　　者：柏松[1] 胡贵军[1] 闫李 常玉鑫[1] 

机构地区：[1]吉林大学通信工程学院,吉林长春130012

出　　处：《光电子．激光》2015年第5期869-876,共8页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61177066)资助项目

摘　　要：针对模式群分集复用(MGDM)系统运算量大和硬件实现困难的问题。通过在发送端选择最佳的入射偏芯距和高斯光尺寸对信号光入射条件的优化,最大限度降低系统的码间干扰(ISI)和信道串扰(ICI)的程度。在不进行电色散补偿的情况下,实现了两路10Gb/s信号在多模光纤(MMF)中有效传输400m,误码率(BER)低于10-3。The dominant limitations for the transmission performance of mode group diversity multiple- xing （MGDM） systems are inter-symbol interference （ISI） and inter-channel interference （ICI） existing in transmission link. And typically, complex equalization algorithm will be employed to compensate these impairments at the receiver. However, the signal processing will increase the computational complexity and the difficulty of the implementation of hardware. In this paper, we investigate the relationship be- tween different incident conditions of the signal light and the number of the excited mode groups, and propose the method of optimizing the incident conditions of the signal light at the transmitter, in order to reduce the ISI and ICI existing in transmission link to the minimal level and improve the transmission performance of the system to a great extent. By combining the theoretical calculation and simulated veri- fication, the optimal conditions of the incident signal light are obtained, and the simulation results show that after the optimization for the core-offset distance and the Gaussian optical spot size at the transmit- ter,the MGDM system can realize that two 10 Gbit/s signals are transmitted over 400 m multi-mode fi- her without any electronic dispersion compensation and the bite error rate is lower than 10-3.

关 键 词：光通信 模式群分集复用(MGDM) 选择模式激发 码间干扰(ISI) 信道串扰(ICI) 

分 类 号：TN913.7[电子电信—通信与信息系统]