光纤隔离器中双包层影响的分析  

Analysis of the Influence of Double Cladding in Fiber Isolator

作　　者：李晓佩[1] 胡姝玲[1] 章博[1] 刘冬雪[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《光电子技术》2016年第3期155-158,163,共5页Optoelectronic Technology

基　　金：国家自然基金资助项目(No.61074158;61307021)

摘　　要：针对大模场双包层光纤在光纤输出隔离器中的应用,根据模式传输理论分析了单模激光在多模光纤中的传输特性。多模光纤与单模光纤无偏心的连接,经单模光纤传输的光在多模光纤中激发出一系列相互叠加的LPon模。利用有限差分光束传播法(FD-BPM)分析波长为1 064nm时双包层光纤的模式传输,利用耦合模扩散理论分析了包层中模场和纤芯中模场的相互影响。结果表明:因为包层模的存在,光纤输出隔离器的性能受到影响,插入损耗增加36%。For the application of large mode area double clad fiber in the isolator,the characteristics of single-mode laser transmitted in the multimode fiber were analyzed based on the coupling power theory.The multimode fiber was connected to single-mode fiber without eccentric,and a series of LPon modes in the multimode fiber were stimulated by the light that was transmitted by the single mode fiber and then coupled.The mode transmission of double clad fiber in the case of 1 064 nm wavelength was analyzed using FD-BPM,and the interaction between the cladding mode field and the fiber core mode field were studied based on the coupled modes diffusion theory.Results show that：the existence of the cladding mode does cause the insertion loss of the isolator to increase by 36%.

关 键 词：双包层光纤 隔离器 包层模 插入损耗 

分 类 号：TN248.1[电子电信—物理电子学]