Temperature self-compensation fiber-optic pressure sensor based on fiber Bragg grating and Fabry-Perot interference multiplexing

被引：27

作者：

Wang, Wenhua ^{[1
,2
]}

Jiang, Xinsheng ^{[3
]}

Yu, Qingxu ^{[2
]}

机构：

[1] Guangdong Ocean Univ, Sch Sci, Zhanjiang 524088, Peoples R China

[2] Dalian Univ Technol, Sch Phys & Optoelect Engn, Dalian 116024, Peoples R China

[3] Fujian Castech Crystals Inc, Fuzhou 350002, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2012年 / 285卷 / 16期

基金：

高等学校博士学科点专项科研基金;

关键词：

Fiber-optic pressure sensor; Multiplexed sensor; Extrinsic Fabry-Perot interferometer; Diaphragm; Fiber Bragg grating; Temperature-pressure cross sensitivity; HIGH-RESOLUTION; SENSITIVITY;

D O I：

10.1016/j.optcom.2012.04.001

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A high performance multiplexed fiber-optic sensor consisted of diaphragm-based extrinsic Fabry-Perot interferometer (DEFPI) and fiber Bragg grating (FBG) is proposed. The novel structure DEFPI fabricated with laser heating fusion technique possesses high sensitivity with 5.35 nm/kPa (36.89 nm/psi) and exhibits ultra-low temperature dependence with 0.015 nm/degrees C. But the ultra-low temperature dependence still results in small pressure measurement error of the DEFPI (0.0028 kPa/degrees C). The designed stainless epoxy-free packaging structure guarantees the FBG to be only sensitive to temperature. The temperature information is created to calibrate the DEFPI's pressure measurement error induced by the temperature dependence, realizing effectively temperature self-compensation of the multiplexed sensor. The sensitivity of the FBG is 10.5 pm/degrees C. In addition, the multiplexed sensor is also very easy to realize the pressure and the temperature high-precise high-sensitive simultaneous measurement at single point in many harsh environmental areas. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：3466 / 3470

页数：5

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