圆形双折射多孔光纤折射率传感器研究  

Investigation on Circular Birefringent Holey Fiber Refractive Index Sensor

作　　者：丁子平 谢应茂[1] 曾泽楷 廖健飞 DING Ziping;XIE Yingmao;ZENG Zekai;LIAO Jianfei(School of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,China)

机构地区：[1]赣南师范大学物理与电子信息学院,江西赣州341000

出　　处：《赣南师范大学学报》2021年第3期49-52,共4页Journal of Gannan Normal University

基　　金：国家自然科学基金(6175003);江西省自然科学基金(20181BAB202029);江西省教育厅科技项目(GJJ18075);赣南师范大学研究生创新基金(YCX19A043)。

摘　　要：设计一种可以工作在近红外区的新型圆形晶格结构的双折射多孔光纤表面等离子体共振折射率传感器.利用全矢量有限元法对传感器的传感特性进行详细的数值研究,研究结果表明:通过合理调节传感器的结构参数,该传感器能同时实现表面等离子体模和纤芯基模的相位匹配条件和损耗匹配条件,使表面等离子体模和纤芯基模产生完全耦合.此外,当待测样品折射率分布在1.33~1.35范围内时,传感器的波长灵敏度最高可达9500 nm/RIU,且其折射率分辨率则高达1.05×10^(-6) RIU.A new type of near-infrared circular lattice birefringent holey fiber surface plasmon resonance refractive index sensor is proposed.The sensing characteristics are numerically investigated by adopting the full-vector finite method.The simulation results show that the phase matching condition and the loss matching condition between the surface plasmon mode and the fiber core mode can be fulfilled simultaneously by properly adjusting the fiber structure parameters,which leads a complete coupling between the surface plasmon mode and the fiber core mode.Furthermore,the maximum wavelength sensitivity is as high as 9500 nm/refractive index unit and the detectable index resolution is up to 1.05×10^(-6) RIU.

关 键 词：光纤光学 多孔光纤 表面等离子体共振 折射率传感器 

分 类 号：TN253[电子电信—物理电子学]