Hydrostatic pressure sensor based on a gold-coated thin-core fiber modal interferometer and ripple shift measurement

被引：2

作者：

Chen, Daru ^{[1
]}

Cheng, Xin ^{[2
]}

Tam, H. Y. ^{[2
]}

机构：

[1] Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Peoples R China

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

来源：

OPTICS COMMUNICATIONS | 2012年 / 285卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Hydrostatic pressure sensor; Thin-core fiber; Fiber modal interferometer; Gold coating; OPTICAL-FIBER; MICROSTRUCTURED FIBERS; SENSITIVITY;

D O I：

10.1016/j.optcom.2012.04.003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a hydrostatic pressure sensor based on a gold-coated thin-core fiber modal interferometer (TCFMI). A thin-core fiber is spliced to a single mode fiber forming a single-end fiber modal interferometer (FMI) due to the core mismatch and the fiber end reflection. Relative reflection spectra of TCFMIs based on thin-core fibers with different lengths are investigated. The TCFMI is gold-coated to enhance the optical reflectivity, which also results in the ripple of the relative reflection spectra of TCFMI. A high hydrostatic pressure sensor test system is proposed and the performance of the pressure sensor has been experimentally investigated. A pure-ripple-shift measurement method is used to achieve the demodulation of the sensor. The proposed pressure sensor has a sensing range up to 40 MPa and a sensitivity of 44.8 pm/MPa. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：3471 / 3474

页数：4

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