Open AccessNon-isothermal bleaching of photodarkened Yb-doped fibers
Author(s) -
Martin Leich,
U. Röpke,
Sylvia Jetschke,
Sonja Unger,
V. Reichel,
J. Kirchhof
Publication year - 2009
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.17.012588
Subject(s) - photodarkening , materials science , optics , isothermal process , full width at half maximum , doping , absorption (acoustics) , thermal , attenuation coefficient , fiber laser , wavelength , optoelectronics , thermodynamics , physics , composite material
We report on the thermal treatment of photodarkened Yb-doped fiber samples. The method of non-isothermal bleaching at different temperature ramp rates can be used to determine the thermal energy distribution of photodarkening induced color centers. A distributed activation energy with a mean value of about 1.3 eV and a FWHM of 0.5 eV was found. Spectral changes during thermal treatment were observed and could be interpreted, e.g. as an enhancement of the absorption cross section.