首页|Radiation build-up and dissipation in Raman random fiber laser

Radiation build-up and dissipation in Raman random fiber laser

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Raman random fiber laser(RRFL)is a complex physical system that arises from the distributed Raman amplification and the intrinsic stochasticity of fiber scattering.The analysis of the underlying light-wave kinetics at steady state has been the focus of considerable interest.However,the transient state,such as the RRFL build-up and dissipation,is particularly important for revealing the lightwave interaction process.Here,we investigate for the first time the RRFL dynamics at the transient state and track the RRFL temporal and spectral evolution theoretically and experimentally.Particularly,with the contribution of random distributed feedback,RRFL build-up exhibits continuous Verhulst logistic growth curves without cavity-related features,which is significantly different from the step-like growth curve of conventional fiber lasers.Furthermore,the radiation build-up duration is inversely related to the pump power,and the spectral evolution of the RRFL undergoes two phases,i.e.,from spectral density increase to spectral broadening.From the steady state to the pump switch-off state,the RRFL output power dissipates immediately,and the remaining Stokes lightwave from the Rayleigh scattering will gradually disappear after one round trip.This work provides new insights into the transient dynamic features of the RRFL.

random fiber laserstimulated Raman scatteringtransient phenomenonnonlinear opticsbiological growth dynamics

Shengtao LIN、Zinan WANG、Jiaojiao ZHANG、Pan WANG、Han WU、Yifei QI

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Key Laboratory of Optical Fiber Sensing and Communications,University of Electronic Science and Technology of China,Chengdu 611731,China

College of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China

National Natural Science Foundation of ChinaNational Ten-Thousand Talent ProgramSichuan Provincial Project for Outstanding Young Scholars in Science and Technology

62075030W0302110010012020JDJQ0024

2024

10.1007/s11432-022-3677-7

中国科学:信息科学(英文版)
中国科学院

中国科学:信息科学(英文版)

CSTPCDEI
影响因子：0.715
ISSN：1674-733X
年,卷(期)：2024.67(1)
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