High spatial resolution microwave detection system for Brillouin-based distributed temperature and strain sensors

被引：26

作者：

Alahbabi, MN ^{[1
]}

Lawrence, NP ^{[1
]}

Cho, YT ^{[1
]}

Newson, TP ^{[1
]}

机构：

[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2004年 / 15卷 / 08期

关键词：

optical fibre sensors; Brillouin scattering; distributed temperature and strain measurements;

D O I：

10.1088/0957-0233/15/8/019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a microwave detection system for coherent detection of spontaneous Brillouin-based distributed temperature and strain measurements. The system was designed to overcome the existing bandwidth limitations of a previously used commercial spectrum analyser and provide a commercially practical solution to the detection of the Brillouin frequency shift and intensity for long range high spatial resolution measurements. The detection system bandwidth corresponds to a potential spatial resolution of similar to60 cm. The system was demonstrated as a temperature sensor over a range of 30 km, with a temperature resolution of 1.6 degreesC and spatial resolution of similar to2 m. It was also demonstrated as a combined temperature and strain sensor over a range of 6.3 km with similar to1.3 m spatial resolution; temperature and strain resolutions of 3 degreesC and 80 muepsilon respectively were achieved.

引用

页码：1539 / 1543

页数：5

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