Thin-Core Fiber Taper-Based Multi-Mode Interferometer for Refractive Index Sensing

被引：11

作者：

Kong, Yujie ^{[1
]}

Shu, Xuewen ^{[1
]}

Cao, Haoran ^{[1
]}

Deng, Jiancheng ^{[1
]}

机构：

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

来源：

IEEE SENSORS JOURNAL | 2018年 / 18卷 / 21期

基金：

中国国家自然科学基金;

关键词：

Refractive index; optical fiber sensors; PHOTONIC CRYSTAL FIBER; FABRY-PEROT; OPTICAL-FIBER; HIGH-RESOLUTION; SENSOR; TEMPERATURE; SENSITIVITY; REFRACTOMETER; GRATINGS; INTERFERENCE;

D O I：

10.1109/JSEN.2018.2868302

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：

We demonstrate a thin-core fiber (TCF)-based hybrid modal interferometer for high-sensitivity refractive index (RI) sensing. It mainly consists of a tapered TCF with an air bubble fabricated by the arc discharge technique using a fusion splicer machine. Due to mode mismatch and the tapering of the TCF, high-order cladding modes are excited, which can be used for high-sensitivity index sensing. The selected two interference dips of the sensor can obtain the index sensitivities of 370.37 and -72.22 dB/RIU in the RI range from 1.333 to 1.3799. Using the differential intensity demodulation method, a total index sensitivity as high as 442.59 dB/RIU can be achieved. Featured with high sensitivity, linear response, small size, ease of fabrication, and low cost, the proposed sensor may have various applications in biochemical sensing field.

引用

页码：8747 / 8754

页数：8

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