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 Chen; Guoyang Li; Li Wang; Liping Chang; Zunqi Lin

doi:10.1117/1.2821209

1 December 2007 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 Chen, Guoyang Li, Li Wang, Liping Chang, Zunqi Lin

Author Affiliations +

Optical Engineering, Vol. 46, Issue 12, 124401 (December 2007). https://doi.org/10.1117/1.2821209

Abstract

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 2.66%/K.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

An Sun, Bai Chen, Jialin Chen, Guoyang Li, Li Wang, Liping Chang, and Zunqi Lin "Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology," Optical Engineering 46(12), 124401 (1 December 2007). https://doi.org/10.1117/1.2821209

Published: 1 December 2007

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