包层模谐振特种光纤及传感特性研究  

Research on Cladding Mode Resonant Specialty Optical Fibers and Their Sensing Properties

作　　者：王廷云[1] 庞拂飞[1] 陈振宜[1] 曾祥龙[1] 陈娜[1] 

机构地区：[1]上海大学特种光纤与光接入网省部共建国家重点实验室培育基地,上海200072

出　　处：《光学学报》2011年第9期337-343,共7页Acta Optica Sinica

基　　金：国家自然科学基金重点项目(60937003);国家自然科学基金(60807031);上海市科委"科技启明星"(10QA1402600)资助课题

摘　　要：研究了一种具有双包层结构的包层模谐振特种光纤,该特种光纤具有一个低折射率内包层,基于耦合模原理,纤芯模与包层模之间发生谐振耦合,从而获得具有带阻特性的传输光谱。系统介绍了包层模谐振光纤的制备、传输原理及其弯曲、溶液折射率、折射率/温度双参量等传感特性。实验和理论研究结果表明,包层模谐振特种光纤对于弯曲、溶液折射率参量具有良好的敏感性,此外,通过内包层掺杂可以调节包层模谐振光谱的温度敏感特性。A cladding mode resonant specialty optical fiber comprising a double cladding structure is proposed.The specific fiber has a thin and low refractive index inner cladding.Based on the coupled mode theory,a core mode can be resonantly coupled to a cladding mode,and then a band-reject spectrum can be obtained.We mainly introduce the fabrication technology,operation principle of the specific fiber and demonstrate its senor applications in bend,solution refractive index（RI） and RI/temperature dual parameters.As the theoretical and experimental results show,the specific fiber is sensitive to the parameters of bend and solution RI.Moreover,the temperature sensitivity of the specific fiber can be adjusted by different dopants in the inner cladding.

关 键 词：光纤传感器 包层模谐振 双包层光纤 弯曲 折射率 温度 

分 类 号：TN247[电子电信—物理电子学]