Due to the simple energy structure of Yb3+ with only two 4f manifolds, energy transfer processes such as cross-relaxation and up-conversion are not expected in Yb-doped materials. Yet, photoconductivity measurements have confirmed the creation of free charge carriers in Yb-doped single crystals when irradiated with pump light of 940nm [1,2]. These experiments focussed particularly on Yb:YAG samples of various doping concentrations and the measurements displayed a nonlinear increase of photocurrent with the excitation density. Further investigations of Yb:YAG ceramics as well as Yb:Lu2O3 show a similar behaviour, indicating that this phenomenon is neither limited to crystalline samples nor to the YAG host. Yet, a different behaviour is observed in Yb-doped fluorides which may be due to the host's different band structure.

© 2009 IEEE

PDF Article
More Like This
Degradation of Laser Performance in Yb-Doped Oxide Thin-Disk Lasers at High Inversion Densities

Susanne T. Fredrich-Thornton, Rigo Peters, Klaus Petermann, and Guenter Huber
TuB18 Advanced Solid-State Photonics (ASSP) 2009

Up-conversion to the Conduction Band in highly doped Yb:YAG and Yb:Y2O3 and its effect on Thin-Disk Lasers

Susanne T. Fredrich-Thornton, Jean-Francois Bisson, Dmitrii Kouznetsov, Ken-ichi Ueda, Klaus Petermann, and Guenter Huber
CFJ6 Conference on Lasers and Electro-Optics (CLEO) 2007

Photoconductivity Measurements Indicating a Nonlinear Loss Mechanism in Highly Yb-doped Oxides

Christian Hirt, Susanne T. Fredrich-Thornton, Friedjof Tellkamp, Klaus Petermann, and Guenter Huber
MF1 Advanced Solid-State Photonics (ASSP) 2008


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription