High Sensitivity Optical Fiber Curvature Sensor Based on Cascaded Fiber Interferometer

被引：82

作者：

Dong, Shandong ^{[1
]}

Dong, Bo ^{[2
]}

Yu, Changyuan ^{[3
]}

Guo, Yongxin ^{[1
]}

机构：

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

[2] Inst Infocomm Res, RF & Opt Dept, Singapore 138632, Singapore

[3] Hong Kong Polytech Univ, Dept Elect & Informat Engn, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2018年 / 36卷 / 04期

关键词：

Cascaded fiber interferometer; curvature; fiber interferometer; fiber sensor; temperature; MACH-ZEHNDER INTERFEROMETER; MODAL INTERFEROMETER; TAPERS;

D O I：

10.1109/JLT.2017.2771507

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 highly sensitive optical fiber curvature sensor based on cascaded fiber interferometers (CFIs) is demonstrated theoretically and experimentally. Theoretical results show that the scheme of cascaded fiber interferometers can be regarded as an equivalent fiber interferometer with longer interference length and narrower FSR. It serves as a curvature sensor with sensitivity up to 4.362 nm/m(-1) within the measurement range of 0-1.134 m(-1). Compared to the single fiber modal interferometer, the curvature sensitivity of the CFI is almost doubled. In addition, simultaneous curvature and temperature measurement is achieved using the coefficient matrix method, eliminating the issue of temperature cross sensitivity.

引用

页码：1125 / 1130

页数：6

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