High Sensitivity Temperature Sensor Based on Directional Coupler in a Liquid-Filled Tapered Hollow Suspended Dual-Core Fiber

被引：0

作者：

Li, Xixin ^{[1
]}

Gao, Shan ^{[1
]}

Yang, Jing ^{[1
]}

Ye, Peng ^{[1
]}

Zhu, Zheng ^{[1
]}

Li, Ping ^{[1
]}

Shi, Jinhui ^{[1
]}

Yuan, Libo ^{[1
]}

Guan, Chunying ^{[1
]}

机构：

[1] Harbin Engn Univ, Coll Phys & Optoelect Engn, Harbin 150001, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2024年 / 42卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Temperature sensors; Sensitivity; Temperature measurement; Claddings; Magnetic liquids; Couplings; Liquids; Directional coupler; optical fiber sensor; special optical fiber; REFRACTIVE-INDEX;

D O I：

10.1109/JLT.2024.3381787

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 high sensitivity optical fiber temperature sensor based on a liquid-filled tapered hollow suspended dual-core fiber (HSDCF) is proposed and experimentally demonstrated. The liquid-filled tapered HSDCF constitute a directional coupler. Due to the small distance between cores and the liquid filled in the air hole, resonance coupling occurs between the two suspended cores. The coupling coefficient between the two suspended cores is strongly dependent on the refractive index of the filled liquid, which causes the sensor to be very sensitive to temperature. Experimental results show that the sensor has a high sensitivity of 38.281 nm/degrees C within the monitorable temperature range of 20-26 degrees C. Due to the advantages of the high sensitivity, good linear response, and good stability, the proposed sensor has great potential for applications in temperature precision measurement.

引用

页码：5048 / 5054

页数：7

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