Temporal-spectral correlation dynamics of Raman random fiber laser  

作　　者：Longqun NI Yifei QI Xingyu BAO Jing ZHANG Pan WANG Han WU Zinan WANG 

机构地区：[1]Key Laboratory of Optical Fiber Sensing and Communications,University of Electronic Science and Technology of China,Chengdu 611731,China [2]College of Electronics and Information Engineering Sichuan University,Chengdu 610064,China

出　　处：《Science China(Information Sciences)》2025年第4期162-172,共11页中国科学(信息科学)(英文版)

基　　金：supported by National Natural Science Foundation of China(Grant Nos.62435002,62075030);Ministry of Science and Technology of China(Grant No.DL2023167001L);Sichuan Science and Technology Program(Grant No.2023YFSY0058);111 Project(Grant No.B14039)。

摘　　要：Raman random fiber laser(RRFL)possesses rich physical properties of spectral,temporal,and spatial domains due to its unique feedback mechanism and complex nonlinear effects.Characterizing and controlling the microscopic evolution dynamics of RRFL are crucial to driving breakthrough advances in fields such as inertial confinement fusion and fundamental physics.In this work,a novel experimental and theoretical analysis of the evolution of the temporal spectral correlations of the RRFL in the transition and steady states is conducted.In the transitional state,the microscopic dynamics of the RRFL excitation process is revealed comprehensively:the temporal-correlation growth curve contrasts with that of resonant-cavity lasers,and the formation and degradation of spectral correlation are observed.In the steady state,the overall spectrum is characterized by partial correlation,and the correlation characteristics of RRFL mainly originate from the spectral random spikes,which offers a novel dimension for the precise control of RRFL correlation.This work provides new insights into underlying physical properties of continuous broadband lasers,offering key guidance for laser design,control,and applications.

关 键 词：random fiber laser microscopic characteristics temporal-spectral correlation random spikes nonlinear optics 

分 类 号：TN248[电子电信—物理电子学]