Distributed forward Brillouin scattering sensor based on chirped fiber Bragg grating array

Zhou Zheng; Zhengying Li; Xulei Fu

doi:10.1117/12.2624307

27 March 2022 Distributed forward Brillouin scattering sensor based on chirped fiber Bragg grating array

Zhou Zheng, Zhengying Li, Xulei Fu

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 1216954 (2022) https://doi.org/10.1117/12.2624307
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

A distributed forward Brillouin scattering (FBS) sensor facilitated by coherent detection is proposed and demonstrated for the acoustic impedance measurement of the surrounding. In virtue of a chirped fiber Bragg grating array, an enhanced backward-propagating sensing signal is generated. By mixing the sensing signal with the intrinsic light, heterodyne coherent detection is realized. The FBS gain spectrum of a selected acoustic mode is then reconstructed from the beat signal, requiring only one round of frequency sweep.

Citation Download Citation

Zhou Zheng, Zhengying Li, and Xulei Fu "Distributed forward Brillouin scattering sensor based on chirped fiber Bragg grating array", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 1216954 (27 March 2022); https://doi.org/10.1117/12.2624307

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