2-kW-level superfluorescent fiber source with flexible wavelength and linewidth tunable characteristics  

作　　者：Jun Ye Chenchen Fan Jiangming Xu Hu Xiao Jinyong Leng Pu Zhou 

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

出　　处：《High Power Laser Science and Engineering》2021年第4期93-102,共10页高功率激光科学与工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.62061136013 and 61905284);the Hunan Provincial Innovation Construct Project(No.2019RS3018);the Director Fund of the State Key Laboratory of Pulsed Power Laser Technology(No.SKL2019ZR01)。

摘　　要：The superfluorescent fiber source(SFS)with tunable optical spectrum has shown great application potential in the sensing,imaging,and spectral combination.Here,we demonstrate for the first time a 2-kW-level wavelength and linewidth tunable SFS.Based on a flexible filtered SFS seed and three stages of fiber amplifiers,the output power can be scaled from the milliwatt level to about 2 kW,with a wavelength tuning range of 1068–1092 nm and a linewidth tuning range of 2.5–9.7 nm.Moreover,a numerical simulation is conducted based on the generalized nonlinear Schr?dinger equation,and the results reveal that the wavelength tuning range is limited by the decrease of seed power and the growth of amplified spontaneous emission,whereas the linewidth tuning range is determined by the gain competition and nonlinear Kerr effects.The developed wavelength and linewidth tunable SFS may be applied to scientific research and industrial processing.

关 键 词：fiber amplifiers high power superfluorescent fiber source tunable lasers 

分 类 号：TN722[电子电信—电路与系统] TN248