Cascaded Fiber Up-Taper Modal Interferometer and Its Application as Fiber Sensor

被引：5

作者：

Dong, Shandong ^{[1
]}

Dong, Bo ^{[2
,3
]}

Yu, Changyuan ^{[4
]}

Guo, Yongxin ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore

[2] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China

[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

[4] Hong Kong Polytech Univ, Dept Elect & Informat Engn, Hung Hom, Hong Kong, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2019年 / 37卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Fiber interferometer; fiber optics sensors; strain and temperature; REFRACTIVE-INDEX; TEMPERATURE;

D O I：

10.1109/JLT.2018.2878040

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 cascaded fiber up-taper interferometer (CFI) is proposed and demonstrated analytically and experimentally. The sensor head of the CFI consists of two cascaded miniaturized fiber up-taper modal interferometers (MMIs). Sensing principle of the CFI is derived based on the transmission matrix method. Conclusions have been achieved that cascading MMIs can effectively improve its thermal sensitivity while strain sensitivity is reduced compared with that of the single MMI. Experimentally, thermal sensitivity of the CFI can reach 112.9 pm/degrees C, and almost two times as big as that of the single MMI. In contrast, its strain sensitivity is only -0.4 pm/mu epsilon, which is only 2/5 as small as that of the single MMI.

引用

页码：2675 / 2680

页数：6

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