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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Optical Engineering, 46(12), 124401 (2007). doi: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.
An Sun, Bai Chen, Jialin Chen, Guoyang Li, Li Wang, Liping Chang, 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
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