Open Access5kW GTWave fiber amplifier directly pumped by commercial 976nm laser diodes
Author(s) -
Hongbing Zhan,
Qinyong Liu,
Yuying Wang,
Weiwei Ke,
Ni Li,
Xiaolong Wang,
Kun Peng,
Cong Gao,
Yuwei Li,
Hungyen Lin,
Jianjun Wang,
Jing Feng,
Aoxiang Lin
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.027087
Subject(s) - materials science , fiber laser , optics , optoelectronics , double clad fiber , laser , laser power scaling , dispersion shifted fiber , fiber , polarization maintaining optical fiber , optical fiber , diode , fiber optic sensor , physics , wavelength , composite material
With home-made fiber perform and special fiber drawing & coating technique, a new-type of (3 + 1) GTWave fiber theoretically designed for bi-directional pump method, was successfully fabricated and justified of integrating multi-kW pump energy from commercial 976nm laser diodes. This (3 + 1) GTWave fiber amplifier demonstrated uniform absorption of pump light and easy thermal management characteristics along the whole fiber length. This amplifier is capable of simultaneously aggregating 5.19kW pump power at 976nm and finally generating 5.07kW laser output at 1066.5nm with an optical-to-optical efficiency of 74.5%, the first publically-reported multi-kW GTWave fiber directly pumped with commercial 976nm laser diodes to the best of our knowledge. No power roll-over was found at 5kW level and further power scaling can be expected with more pump power. The results indicate that GTWave fiber is a competitive integrated fiber device to collect enough pump energy from low-cost commercial laser diodes for multi-kW fiber laser development.