Open AccessOn the tunability of a narrow-linewidth Yb-fiber laser from three- to four-level lasing behaviour
Author(s) -
Peter Zeil,
Fredrik Laurell
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.013940
Subject(s) - laser linewidth , lasing threshold , materials science , optics , fiber bragg grating , fiber laser , laser , wavelength , optoelectronics , ytterbium , doping , physics
We report on a tunable multi-watt ytterbium-doped fiber laser bridging the gap from three-level lasing around 980 nm to true four-level lasing at 1100 nm. Wavelength-locking and -tuning was achieved by using an external volume-Bragg grating(VBG) as the cavity end mirror. The results are compared with detailed numerical calculations based on a spectrally resolved rate equation analysis, taking competing emission at other wavelengths into account.