Open AccessFiber gratings matching and output characteristics of fiber laser
Author(s) -
Jiaxing Liu,
Xia Liu,
Zhong Shou-Dong,
Jianqiang Wang,
Dapeng Zhang,
Xinglong Wang
Publication year - 2019
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.68.20190178
Subject(s) - materials science , optics , fiber laser , polarization maintaining optical fiber , fiber bragg grating , dispersion shifted fiber , graded index fiber , laser , plastic optical fiber , laser power scaling , fiber , optoelectronics , fiber optic sensor , physics , composite material
In order to improve the output power and processing quality in industrial applications, it is important to optimize the output characteristics of the high-power fiber lasers. The slope efficiency, backward leaking power and stimulated Raman scattering are key issues in high-power fiber laser design. The parameters matching the fiber gratings, which are the critical components, have a direct influence on the whole fiber laser system. In this paper, the parameters matching the fiber gratings in fiber lasers are investigated. Firstly, the origin of slope efficiency, backward leaking power and stimulated Raman scattering are analyzed in theory. Then the influences on output characteristics of fiber lasers comprised of the output coupler gratings, which have different bandwidths and reflectivities, are experimentally studied. Finally, the optimized parameters and matching principle of fiber gratings in high-power fiber laser are obtained , thus providing an alternative method to improve the output characteristics of high-power continuous wave fiber laser.