Open AccessHigh-power linearly-polarized single-frequency thulium-doped fiber master-oscillator power-amplifier
Author(s) -
L. Pearson,
J.W. Kim,
Z. Zhang,
M. Ibsen,
J.K. Sahu,
W.A. Clarkson
Publication year - 2010
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.18.001607
Subject(s) - materials science , optics , amplifier , laser linewidth , fiber laser , optoelectronics , extinction ratio , polarization maintaining optical fiber , laser , optical fiber , physics , fiber optic sensor , wavelength , cmos
We report a high power narrow-linewidth source at approximately 2 microm based on a Tm-doped fiber distributed-feedback master-oscillator and three Tm fiber amplifier stages. The master-oscillator and first two amplifier stages were in-band pumped by Er,Yb fiber lasers operating at 1565 nm, and the final stage amplifier was cladding-pumped at 795 nm by two spatially-combined diode-stacks. The MOPA yielded 100 W of single frequency output at 1943 nm with a beam propagation factor (M(2)) of 1.25 and with a polarization extinction ratio of >94%. The output power was limited by thermally-induced damage in the final amplifier stage. The prospects for further power scaling are considered.