Brillouin frequency shift measurement by zero-crossing point search in virtually synthesized spectra of Brillouin gain and loss

We demonstrate a method for fast and precise Brillouin frequency shift measurement based on searching for the zero-crossing point of a virtually composed spectrum of Brillouin gain and loss obtained by a dual-frequency probe beam. Simulations and experiments show that searching for the zero-crossing...

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Bibliographic Details
Published in:Applied physics express 2024-05, Vol.17 (5), p.52003
Main Authors: Nonogaki, Hayato, Sei, Daichi, Zan, Mohd Saiful Dzulkefly, Tanaka, Yosuke
Format: Article
Language:English
Subjects:
Brillouin scattering
distributed fiber sensing
fiber sensor
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Summary:We demonstrate a method for fast and precise Brillouin frequency shift measurement based on searching for the zero-crossing point of a virtually composed spectrum of Brillouin gain and loss obtained by a dual-frequency probe beam. Simulations and experiments show that searching for the zero-crossing point of a virtually synthesized Brillouin gain spectrum can be easily done without a large error compared with peak search of the Brillouin gain spectrum in the conventional method.
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/ad422f