High sensitive temperature sensing system based on multi-wavelength fiber laser with dispersion shifted fiber

被引:6
|
作者
Chen, Bowen [1 ,2 ]
Wang, Tianshu [1 ,3 ]
Jia, Qingsong [1 ,3 ]
Wang, Zhen [1 ,2 ]
Zhao, Desheng [1 ,3 ]
机构
[1] Changchun Univ Sci & Technol, Natl & Local Joint Engn Res Ctr Space Optoelect T, Changchun 130022, Jilin, Peoples R China
[2] Changchun Univ Sci & Technol, Coll Sci, Changchun 130022, Jilin, Peoples R China
[3] Changchun Univ Sci & Technol, Coll Optoelect Engn, Changchun 130022, Jilin, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1364/OSAC.1.000401
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A temperature sensing system based on a multi-wavelength Brillouin fiber laser (MBFL) is proposed and demonstrated. Two beams of Stokes light are generated in a temperature sensitive fiber and a reference fiber. respectively. Stokes light from temperature sensitive fiber can generate frequency shift with temperature changing, and two beams can produce a microwave signal by beat frequency. Therefore, change of temperature can be accurately measured according to variation of the central frequency of the beat frequency microwave signals. A 3.2 km long dispersion shifted fiber (DSF) is used as temperature sensitive fiber pumped by a Brillouin pump with power of 1.5 W, then more than 20 Stokes light wavelengths can be observed. By using the 18th order Stokes light pair, temperature sensitivity can be 19.93 MHz/degrees C. The uncertainty of the temperature measurement is +/- 0.125 degrees C. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码:401 / 407
页数:7
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