Broadband bidirectional Brillouin–Raman random fiber laser with ultra-narrow linewidth  

作　　者：杨茜 李阳 邹辉 梅杰 徐恩明 张祖兴 Qian Yang;Yang Li;Hui Zou;Jie Mei;En-Ming Xu;Zu-Xing Zhang(Advanced Photonic Technology Laboratory,College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]Advanced Photonic Technology Laboratory,College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Chinese Physics B》2024年第2期371-376,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 62175116 and 91950105);the 1311 Talent Plan of Nanjing University of Posts and Telecommunications, China;the Postgraduate Research & Practice Innovation Program, Jiangsu Province, China (Grant No. SJCX21_0276)

摘　　要：We present a Brillouin–Raman random fiber laser(BRRFL)with full-open linear cavity structure to generate broadband Brillouin frequency comb(BFC)with double Brillouin-frequency-shift spacing.The incorporation of a regeneration portion consisting of an erbium-doped fiber and a single-mode fiber enables the generation of broadband BFC.The dynamics of broadband BFC generation changing with the pump power(EDF and Raman)and Brillouin pump(BP)wavelength are investigated in detail,respectively.Under suitable conditions,the bidirectional BRRFL proposed can produce a flatamplitude BFC with 40.7-nm bandwidth ranging from 1531 nm to 1571.7 nm,and built-in 242-order Brillouin Stokes lines(BSLs)with double Brillouin-frequency-shift spacing.Moreover,the linewidth of single BSL is experimentally measured to be about 2.5 kHz.The broadband bidirectional narrow-linewidth BRRFL has great potential applications in optical communication,optical sensing,spectral measurement,and so on.

关 键 词：random laser fiber laser stimulated Brillouin scattering(SBS) stimulated Raman scattering(SRS) 

分 类 号：TN248[电子电信—物理电子学]