Fiber-Optic Temperature Sensor Using a Fabry-Perot Cavity Filled With Gas of Variable Pressure

被引：21

作者：

Lu, Yujie ^{[1
]}

Han, Ming ^{[1
]}

Tian, Jiajun ^{[1
,2
]}

机构：

[1] Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA

[2] Harbin Inst Technol, Shenzhen Grad Sch, Coll Elect & Informat Engn, Shenzhen 518055, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 08期

基金：

美国国家科学基金会;

关键词：

Fiber-optic sensors; temperature measurement; microstructure fiber; Fabry-Perot interferometer; INTERFEROMETER;

D O I：

10.1109/LPT.2014.2304297

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：

We report a high-temperature fiber-optic sensor based on measuring the spectral fringes of a Fabry-Perot (FP) cavity on a microstructure fiber (MF) when the gas pressure in the cavity is varied through the holes in the MF. Theoretical analysis shows that the absolute temperature can be deduced from the slope of the spectral shift versus pressure curve, which requires no calibration and is insensitive to the FP cavity length variations. For demonstration, we fabricated a miniature sensor whose FP cavity is formed by sandwiching a fuse-silica tube between a side-hole MF and a solid-core fiber. Using the holes in the MF as gas channels, the pressure in the FP cavity is controlled. The sensor was tested for operation above 1000 degrees C. Strain-insensitive temperature measurement was demonstrated at ambient temperature for a strain range up to 3600 mu epsilon.

引用

页码：757 / 760

页数：4

共 13 条

[1] Peculiarities of thermo-optic coefficient under different temperature regimes in optical fibers containing fiber Bragg gratings [J].