Random fiber laser using a cascaded fiber loop mirror  

作　　者：Ming Shen Yanxin Li Qianying Li Xuewen Shu 

机构地区：[1]Huazhong University of Science and Technology,Wuhan National Laboratory for Optoelectronics,Wuhan,China [2]Huazhong University of Science and Technology,School of Optical and Electronic Information,Wuhan,China

出　　处：《Advanced Photonics Nexus》2024年第3期81-88,共8页先进光子学通讯（英文）

基　　金：supported by the National Key R&D Program of China(Grant No.2023YFE0105800);the National Natural Science Foundation of China(Grant Nos.62275093 and 61775074);the Key R&D Program of Hubei Province(Grant No.2021BAA036).

摘　　要：Random fiber lasers(RFLs)have attracted extensive attention due to their rich physical properties and wide applications.Here,a RFL using a cascaded fiber loop mirror(CFLM)is proposed and presented.A CFLM with 10 fiber loop mirrors(FLMs)is simulated by the transfer matrix method and used to provide random feedback.Multiple spikes are observed in both the simulated and measured reflection spectra.The RFL operates in a single longitudinal mode near the threshold and a time-varying multilongitudinal mode at higher pump powers.The RFL exhibits a time-varying radio-frequency spectrum.The Lévy–Gaussian distribution transition is observed,as in many RFLs.The operation mechanism of the lasing longitudinal modes and the impact of complex mode competition and mode hopping on the output characteristics are discussed through experimental and theoretical results.In this study,we unveil an artificial random feedback structure and pave another way for the realization of RFLs,which should be a platform for multidisciplinary studies in complex systems.

关 键 词：random fiber lasers fiber loop mirrors artificial scattering media. 

分 类 号：TN2[电子电信—物理电子学]