title: Non-isothermal bleaching of photodarkened Yb-doped fibers.
abstract: 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.
authors: Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany. martin.leich@ipht-jena.de
authors: Martin
authors: M
authors: Leich
authors: Ulrich
authors: U
authors: Röpke
authors: Sylvia
authors: S
authors: Jetschke
authors: Sonja
authors: S
authors: Unger
authors: Volker
authors: V
authors: Reichel
authors: Johannes
authors: J
authors: Kirchhof