Two semicircular-hole fiber in a Sagnac loop for simultaneous discrimination of torsion, strain and temperature

被引：34

作者：

Htein, Lin ^{[1
]}

Gunawardena, Dinusha Serandi ^{[1
]}

Liu, Zhengyong ^{[1
,2
]}

Tam, Hwa-Yaw ^{[1
,3
]}

机构：

[1] Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

[2] Sun Yat Sen Univ, Sch Elect & Informat Technol, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

[3] Hong Kong Polytech Univ, Photon Res Ctr, Shenzhen Res Inst, Shenzhen, Peoples R China

来源：

OPTICS EXPRESS | 2020年 / 28卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Birefringence - Optical fibers;

D O I：

10.1364/OE.402925

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a highly sensitive twist sensor based on a Sagnac interferometer constructed with a new type of optical fiber which contains an elliptical core and two large semicircular-holes, where the slow axis of the core orthogonal to the air-holes has a large sensitivity towards twist-induced birefringent changes. The novel fiber structure results in a highest twist sensitivity of 5.01 nm/degrees at a chosen dip over the range from 370 degrees-400 degrees. The resonance dips in the interference pattern respond with different rates in the wavelength shifts in the presence of physical parameters permitting to experimentally distinguish directional torsion, axial strain and temperature. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：33841 / 33853

页数：13

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