Open AccessSRS suppression in multi-kW fiber lasers with a multiplexed CTFBG
Author(s) -
Huaqing Song,
Dongling Yan,
Wenjie Wu,
Biao Shen,
Xi Feng,
Yu Liu,
Li Li,
Qiuhui Chu,
Min Li,
Jianjun Wang,
Rumao Tao
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.426979
Subject(s) - fiber bragg grating , materials science , optics , fiber laser , laser , optoelectronics , fiber , multiplexing , phosfos , polarization maintaining optical fiber , plastic optical fiber , fiber optic sensor , physics , telecommunications , computer science , composite material
In this paper, we present experimental studies on newly developed multiplexed chirped tilted fiber Bragg gratings (MCTFBGs) for stimulated Raman scattering (SRS) suppression for high-power fiber laser systems. The MCTFBG device is composed of five continuous segments of chirped tilted fiber Bragg gratings (CTFBGs), which are inscribed into the large-mode-area (LMA, 25/400μm) fibers. The SRS suppression capability of the MCTFBG device has been successfully demonstrated with a master oscillator power amplification (MOPA) fiber laser system at the output level of 3.4 KW. The experimental observation thus indicates the MCTFBG's excellent SRS suppression capability at a very high power level (∼15 dB under >3 kW) and high thermal handling capacity (∼1.48℃/kw). Our work thus provides a key development of essential fiber grating components that can effectively suppress the SRS suppression at a very high power level.