多芯激励下实际多芯光纤芯间串扰特性研究  

Research on inter-core crosstalk characteristics of real multi-core fibers with multi-core excitation

作　　者：向练 潘洪峰 金树林 邵卫东[1,2] XIANG Lian;PAN Hongfeng;JIN Shulin;SHAO Weidong(Key Laboratory of Advanced Optical Communication Network Technology,Soochow University,Suzhou 215006,China;School of Electronic Information and Engineering,Soochow University,Suzhou 215006,China)

机构地区：[1]苏州大学光通信网络技术重点实验室,江苏苏州215006 [2]苏州大学电子信息学院,江苏苏州215006

出　　处：《通信学报》2022年第11期233-241,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61801322);江苏省高校自然科学研究面上基金资助项目(No.15KJB510028)。

摘　　要：基于耦合功率理论研究了多芯激励下实际多芯光纤的功率和串扰分布特性。根据简化后的七芯光纤功率耦合方程,推导了3种多芯激励情况下各纤芯的光信号功率和芯间串扰的解析表达式。仿真结果表明,经过长距离传输,各纤芯中的光功率会收敛到一个定值,达到动态平衡状态,并且其收敛距离随着弯曲半径的增大呈指数级减小,逐渐趋于一个定值。此外,为研究多芯激励和单芯激励的关系,推导了多个纤芯同时激励和分别激励下耦合纤芯的功率和串扰的解析表达式。研究表明,多个纤芯激励对耦合纤芯串扰的贡献是不相关的,多芯激励的串扰等同于单芯分别激励下串扰的线性叠加。Based on the coupled power theory,the characteristics of optical power and inter-core crosstalk(ICXT)were studied in real multi-core fibers(MCF)with multi-core excitation.According to the simplified coupled power equation of 7-core fiber,the analytical expressions of optical signal power and ICXT in each fiber core were deduced under three multi-core excitation conditions.Simulation results show that,after long-distance transmission,the optical power of each core would converge to a fixed value and reach a dynamic equilibrium state,and its convergence distance decreased ex-ponentially with the increase of bending radius and gradually tended to a fixed value.In addition,in order to study the re-lationship between multi-core excitation and single-core excitation,the analytical expressions of the power and ICXT in coupled cores were deduced under simultaneous excitation and separate excitation of multi-core.Research shows that the contribution of multi-core excitations to the ICXT of coupled core is irrelevant,and the ICXT of multi-core excitation is equivalent to the sum of the ICXT obtained by the excitation of the cores separately.

关 键 词：多芯光纤 芯间串扰 耦合功率理论 多芯激励 空分复用 

分 类 号：TN913[电子电信—通信与信息系统]