栅状膜双芯D型PCF折射率传感器  

Grating membrane dual core D-type PCF refractive index sensor

作　　者：房黎明 陈鹤鸣 FANG Liming;CHEN Heming(College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院、微电子学院,南京210023 [2]南京邮电大学贝尔英才学院,南京210023

出　　处：《光通信技术》2020年第5期33-37,共5页Optical Communication Technology

基　　金：国家自然科学基金(No.61571237)资助;江苏省自然科学基金(No.BK20151509)资助;江苏省研究生创新项目(Nos.KYLX15_0835,KYZZ16_0251)资助。

摘　　要：为了提高光纤传感器线性探测范围以及灵敏度,提出了一种双纤芯结构的基于表面等离子共振(SPR)原理的D型光纤折射率传感器,采用栅状镀膜的光子晶体光纤(PCF)构成抛光面,引入铜栅状膜可以调节共振波长,提高传感器的灵敏度。在各向异性的完美匹配层边界条件下,利用全矢量有限元法对传感器特性进行了数值仿真,结果表明:该传感器折射率测量范围为1.31~1.35,灵敏度最高可达9600 nm·RIU-1,分辨率可达1.04×10-5 RIU。In order to improve the linear detection range and sensitivity of fiber sensor,a dual core structure of D-type fiber refractive index sensor based on surface plasmon resonance(SPR)principle is proposed.The grating coated photonic crystal fiber(PCF)is used to form the polished surface.The resonant wavelength can be adjusted and sensitivity of the sensor can be improved by introducing a copper grating membrane.Under the anisotropic perfect matching layer boundary condition,the simulation is preformed through the full vector finite element method.The results show that the refractive index detection range of the sensor is from 1.31 to 1.35,the maximum sensitivity can reach 9600 nm·RIU-1,and the resolution can reach 1.04×10-5 RIU.

关 键 词：表面等离子共振 栅状镀膜双芯 全矢量有限元法 折射率 传感器 基模损耗 

分 类 号：TN256[电子电信—物理电子学]