1 December 2007 Detection of Brillouin scattering temperature signal in Brillouin optical time-domain reflectometer sensing system based on instantaneous frequency measurement technology
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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)
An Sun, An Sun, Bai Chen, Bai Chen, Jialin Chen, Jialin Chen, Guoyang Li, Guoyang Li, Li Wang, Li Wang, Liping Chang, Liping Chang, Zunqi Lin, 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 . Submission:
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