100 km distributed temperature sensor based on coherent detection of spontaneous Brillouin backscatter
Mohamed N Alahbabi; Yuh T Cho; Trevor P Newson; Mohamed N Alahbabi; Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK; Yuh T Cho; Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK; Trevor P Newson; Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
Журнал:
Measurement Science and Technology
Дата:
2004-08-01
Аннотация:
We report the longest sensing range of a distributed temperature change measurement along an optical sensing fibre with single-ended access. The technique is based on spontaneous Brillouin scattering and microwave heterodyne detection. The Brillouin frequency shift was used to obtain the distributed temperature change at a range of 100 km with a temperature error of less than 8 °C, and a spatial resolution of 50 m.
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