Brillouin optical correlation domain analysis based on a phase-chaos laser  

作　　者：Lintao Niu Yahui Wang Jing Chen Haochen Huang Lijun Qiao Mingjiang Zhang 

机构地区：[1]Taiyuan University of Technology,Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan,China [2]Taiyuan University of Technology,College of Physics and Optoelectronics,Taiyuan,China [3]Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan,China

出　　处：《Advanced Photonics Nexus》2024年第6期106-116,共11页先进光子学通讯(英文)

基　　金：supported by the National Key Research and Development Program of China(Grant No.2023YFF0715700);the National Natural Science Foundation of China(Grant Nos.62205233,U23A20375,and 62075151);the Fundamental Research Program of Shanxi Province(Grant No.202103021223041);the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(Grant No.2022SX-AT002).

摘　　要：The physical mechanism of gain motivation is the main theoretical bottleneck that restricts the signal-to-noise ratio(SNR)and results in a mono-merit implementation for the existing stimulated Brillouin scattering-based fiber sensors.A phase-chaos laser(PCL)is proposed and introduced in the Brillouin optical correlation domain analysis(BOCDA)scheme to promote the SNR and achieve a high-accuracy measurement.The PCL characteristics are presented,and a theoretical model of chaos gain accumulation and extraction is perfected.Then,the simulation results reveal that the SNR is improved by 5.56 dB,and the signal-to-background noise ratio(SBR)of the Brillouin gain spectrum(BGS)is promoted by 8.28 dB with a 100-km sensing distance.Further,the PCL is experimentally generated.In the proof-of-concept experiment,the accuracy of the Brillouin frequency shift is upgraded to 0.64 MHz,and the SBR of BGS is improved by 10.77 dB.The PCL provides a new research direction for optical chaos,and the PCL-BOCDA showcases a promising future for optimal-merit-coupling sensing and its application.

关 键 词：phase-chaos laser distributed fiber sensing stimulated Brillouin scattering high signal-to-noise ratio 

分 类 号：TN2[电子电信—物理电子学]