渐变折射率多模光纤中的多模干涉应用研究  

Research on Multimode Interference Application in Graded-index Multimode Fiber

作　　者：陈润秋[1] 刘艳[1] 高松[1] 

机构地区：[1]北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室,北京100044

出　　处：《光电技术应用》2014年第3期17-20,37,共5页Electro-Optic Technology Application

基　　金：中央高校基本科研业务费专项资金(2013JBM005)

摘　　要：论述了SMS(单模-多模-单模)光纤结构的多模干涉基本理论,利用FD-BPM(有限差分光束传播法)对渐变折射率多模光纤和阶跃折射率多模光纤进行数值模拟,将自聚焦位置、激发模式等特征进行对比,给出渐变折射率多模光纤的优点。利用自聚焦效应,对渐变折射率多模光纤的聚焦和发散作用进行了理论分析,以较短的长度充当透镜的功能,并总结了现阶段的主要应用。A muhimode interference basic theory of singlemode-mutlimode-singlemode （SMS） is described. Nu- merical simulation is performed to multimode fiber with graded-index and step-index using finite difference-beam propagation method （FD-BPM）. Features such as self-focusing location and exciting mode are compared to show the advantages of multimode fiber with graded-index. According to self-focusing effect, focusing and diverging functions of multimode fiber with graded-index are analyzed on theory. The shorter fiber is used in lens and the main applications at present are summarized.

关 键 词：多模干涉 渐变折射率多模光纤 FD-BPM 自聚焦位置 

分 类 号：TP212.44[自动化与计算机技术—检测技术与自动化装置]