Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology

An Sun; Bai Chen; Jialin ChenGuoyang LiLi WangLiping ChangZunqui Lin

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Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology

机译：Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology

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摘要

We present a simple and practical method for the single-ended distributed fiber temperature measurements using microwave (11-GHz) coherent detection and the instantaneous frequency measurement (IFM) technique to detect spontaneous Brillouin backscattered signal in which a specially designed rf bandpass filter at 11 GHz is used as a frequency discriminator to transform frequency shift to intensity fluctuation. A Brillouin temperature signal can be obtained at 11 GHz over a sensing length of 10 km. The power sensitivity dependence on temperature induced by frequency shift is measured as 2.66percent/K.

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来源
《Optical Engineering》 |2007年第12期|124401-1-124401-3-0|共3页
作者
An Sun; Bai Chen; Jialin ChenGuoyang LiLi WangLiping ChangZunqui Lin;
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作者单位

Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, National Joint Laboratory for High Power Laser Physics, 201800 Shang Hai, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
关键词
optical fiber sensors; Brillouin scattering; temperature measurement; optical coherent detection; instantaneous frequency measurement;

Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology

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