High power narrow linewidth LP11 mode fiber laser using mode-selective FBGs. (4th September 2018)

• Record Type: Journal Article
• Authors: Song, Jiaxin; Xu, Haiyang; Wu, Hanshuo; Huang, Liangjin; Xu, Jiangming; Zhang, Hanwei; Zhou, Pu
• Is Part Of: Laser physics letters. Volume 15:Number 11(2018:Nov.)
• Publication Date: 2018-09-04
• Subjects: high-order transverse mode -- narrow linewidth -- all-fiber -- Yb-doped fiber laser -- high power; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aad98d
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We demonstrated a high power Yb-doped fiber laser capable of delivering LP11 mode laser output. The oscillation of LP11 mode was realized by incorporating a pair of few-mode fiber Bragg gratings (FBGs), whose LP11 mode reflection peaks are matched with each other. The temperature-sensitivity of the FBGs was used to optimize the matching degree of the LP11 mode reflection peaks. Based on this configuration, over 50 W of LP11 mode output power with a linewidth of around 70 pm was obtained, which, to the best of our knowledge, is the highest power obtained in LP11 mode all-fiber lasers. Moreover, this laser possesses a certain stability; the standard deviation of whose output power is ~0.07% over a period of 300 s stability test. This work could provide a stable and high power LP11 transverse mode laser source for a wide range of applications.