Refractive Index Sensors Based on a Chirped Core Long-Period Fiber Grating

被引：8

作者：

Chen, Jiong ^{[1
,2
]}

Cui, Suochao ^{[2
]}

Zhang, Shuo ^{[2
]}

Liu, Aidong ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[2] Huazhong Inst Electroopt, Wuhan 430223, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2024年 / 36卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Optical fiber sensors; Sensors; Sensitivity; Claddings; Splicing; Mechanical sensors; Refractive index; Multimode fiber; fiber sensor; refractive index measurement;

D O I：

10.1109/LPT.2024.3396859

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A compact RI sensor with a high sensitivity basedon LPFG is designed and experimentally confirmed. The pro-posed sensor is realized by splicing different fibers, whichgives it stable mechanical performance. The simulation resultsindicate that, at short lengths, a high sensitivity is achievedby optimizing the strength of the evanescent field. Consistentwith the simulation results, the sensor demonstrated a high RIsensitivity (>600 nm/RIU in 1.42) and a compact size (about2.7 mm) in the experiment. The temperature response of thesensor is 19 pm/degrees C at the range of 26-90 degrees C. The compact sizeand high RI sensitivity give this LPFG a competitive advantage invarious refractive index measurement engineering applications.

引用

页码：771 / 774

页数：4

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