首页|Brillouin expanded time-domain analysis based on dual optical frequency combs

Brillouin expanded time-domain analysis based on dual optical frequency combs

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  • 国家科技期刊平台
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Brillouin Optical Time-Domain Analysis(BOTDA)is a widely-used distributed optical fiber sensing technology employing pulse-modulated pump waves for local information retrieval of the Brillouin gain or loss spectra.The spatial resolution of BOTDA systems is intrinsically linked to pulse duration,so high-resolution measurements demand high electronic bandwidths inversely proportional to the resolution.This paper introduces Brillouin Expanded Time-Domain Analysis(BETDA)as a modified BOTDA system,simultaneously achieving high spatial resolution and low detection bandwidth.Utilizing two optical frequency combs(OFCs)with different frequency intervals as pump and probe,local Brillouin gain spectra are recorded by their spectral beating traces in an expanded time domain.A 2-cm-long hotspot located in a 230 m single-mode fiber is successfully measured in the time domain with a detection bandwidth of less than 100 kHz using dual OFCs with tailored spectral phase,line spacing,and bandwidth.

Jae Hyeong Youn、Kwang Yong Song、Sonia Martin-Lopez、Miguel Gonzalez-Herraez、María R.Fernández-Ruiz

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Dept.of Physics,Chung-Ang University,Seoul,Korea

Dept.of Electronics,Universidad de Alcala,Madrid,Spain

National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIP)Institute of Information and Communications Technology Planning and Evaluation(IITP)grant funded by the Korea government(MSI

NRF-2022M3K4A10971241711159646

2024

10.1038/s41377-024-01499-x

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(8)