Open AccessHigh-power all-fiber wavelength-tunable thulium doped fiber laser at 2 μm
Author(s) -
Ke Yin,
Bin Zhang,
Guanghui Xue,
Lei Li,
Jing Hou
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.22.019947
Subject(s) - materials science , fiber laser , optics , dispersion shifted fiber , slope efficiency , laser power scaling , wavelength , laser , thulium , optoelectronics , amplifier , fiber bragg grating , polarization maintaining optical fiber , optical fiber , fiber optic sensor , doping , physics , cmos
Power scaling of an all-fiber wavelength-tunable thulium doped fiber laser (TDFL) based on a monolithic master oscillator power amplifier (MOPA) system is presented. The whole configuration is comprised of a low-power seed oscillator and two stages of double-cladding thulium doped fiber amplifiers (TDFAs). The tuning of the operating wavelength is realized by inserting a spectral tunable filter into the seed oscillator. Maximum average output power of 115 W is obtained at 1950 nm with a linearly fitted slope efficiency of 51.7%. This laser has superior spectral characteristics with wavelength tunable from 1940 nm to 2070 nm. To the best of our knowledge, this is the first demonstration of an all-fiber wavelength-tunable TDFL at 2 μm with output power exceeding 100 W. The results are of great interest for many application areas.