降低模分复用传输中信号串扰的预编码技术  

Precoding technology for reducing signal crosstalk in mode division multiplexing transmission

作　　者：富惠雯 朱子岳 赵梦鑫 陈健[1] FU Huiwen;ZHU Ziyue;ZHAO Mengxin;CHEN Jian(Key laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海200444

出　　处：《光通信技术》2021年第1期32-35,共4页Optical Communication Technology

基　　金：国家自然基金项目(61635006)资助;国家重点研发计划(2018YFB1801800)资助;上海市科委重点项目(17010500400,18511103400)资助;高等学校学科创新引智计划(111)(D20031)资助。

摘　　要：为降低点到多点短距离模分复用传输中的模式串扰,提出了一种基于系数回传的预编码方法。设计了联合控制任意波形发生器(AWG)和示波器(DSO)的控制台,以及连接500 m少模光纤(FMF)的光子灯笼强度调制直接检测(IM-DD)模分复用传输系统,并选用LP01-LP01模式信道和LP11a-LP11b模式信道进行对比实验。实验结果表明:使用该方案之后的信号误码率在1.3E-2前向纠错(FEC)(G.975.1-25%OH)门限时,LP01-LP01、LP11a-LP11b进入光子灯笼的信号发送功率分别降低了约5 dBm、2 dBm。In order to reduce the mode crosstalk in point to multipoint short distance mode division multiplexing transmission,a precoding method based on coefficient return is proposed.The console of arbitrary waveform generator(AWG)and digital storage oscilloscope(DSO)is designed,and the mode division multiplexing transmission system of photon lantern intensity modulation direct detection(IM-DD)connected with 500 m few mode fiber(FMF)is designed.The LP01-LP01 mode channel and LP11a-LP11b mode channel are selected for comparing experiments.The experimental results show that when the bit error rate is at the 1.3E-2 forward error correction(FEC)(G.975.1-25%OH)threshold,the signal transmission power of LP01-LP01 and LP11a-LP11b entering the photonic lantern decreases by about 5 dBm and 2 dBm.

关 键 词：光通信 模分复用 模式串扰 预编码 系数回传 

分 类 号：TN915.62[电子电信—通信与信息系统]