Optical fiber refractive index sensor based on the double cladding fiber

被引：0

作者：

Cai, Lu ^{[1
,2
]}

Wang, Xiu-chang ^{[1
]}

机构：

[1] Northeastern Univ, Coll Informat Sci & Engn, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China

[2] Hebei Key Lab Micronano Precis Opt Sensing & Meas, Qinhuangdao, Hebei, Peoples R China

来源：

INSTRUMENTATION SCIENCE & TECHNOLOGY | 2022年 / 50卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Double-cladding fiber; optical fiber sensor; refractive index sensor; cladding mode resonance; MODE RESONANCE;

D O I：

10.1080/10739149.2021.2018602

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An optical fiber sensing structure based on double-cladding fiber (DCF) is described. The core and outer cladding of the DCF both supports more than one guided mode and the cladding mode resonance as well as modal interference in the fiber. Due to the W-type refractive index (RI) distribution, the outer cladding generates a stronger evanescent field to obtain higher sensitivity. In the transmitted spectrum, all three dips shift to the longer wavelength with the external RI changing from 1.33 to 1.43, and the high sensitivities are 595, 741, and 686 nm/RIU, respectively.

引用

页码：414 / 421

页数：8