Open AccessKilowatt Ytterbium-Raman fiber laser
Author(s) -
Lei Zhang,
Chi Liu,
Huawei Jiang,
Yunfeng Qi,
Bing He,
Jun Zhou,
Xiaodong Gu,
Yan Feng
Publication year - 2014
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.22.018483
Subject(s) - materials science , fiber laser , optics , ytterbium , laser power scaling , dispersion shifted fiber , laser , polarization maintaining optical fiber , optoelectronics , raman spectroscopy , photonic crystal fiber , fiber optic sensor , fiber , doping , physics , wavelength , composite material
A kilowatt-level Raman fiber laser is demonstrated with an integrated Ytterbium-Raman fiber amplifier architecture. A high power Ytterbium-doped fiber master oscillator power amplifier at 1080 nm is seeded with a 1120 nm fiber laser at the same time. By this way, a kilowatt-level Raman pump laser at 1080 nm and signal laser at 1120 nm is combined in the fiber core. The subsequent power conversion from 1080 nm to 1120 nm is accomplished in a 70 m long passive fiber. A 1.28 kW all-fiber Raman amplifier at 1120 nm with an optical efficiency of 70% is demonstrated, limited only by the available pump power. To the best of our knowledge, this is the first report of Raman fiber laser with over one kilowatt output.