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Applied Physics B

, Volume 64, Issue 6, pp 647–650 | Cite as

Excited state absorption measurements and laser potential of Cr4+ doped Ca2GeO4

  • T.C. Brunold
  • H.U. Güdel
  • M.F. Hazenkamp
  • G. Huber
  • S. Kück

4+

doped Ca2GeO4 in the 450–2000 nm spectral region at room temperature are presented. Weak ESA bands due to the \({}^{3}T{}_{2}\to {}^{3}T{}_{1}(F)\) transition are observed between 1200 and 2000 nm and stronger ESA bands due to \({}^{3}T{}_{2}\to {}^{3}T{}_{1}(P)\) peak below 1200 nm. The overlap of the \({}^{3}T{}_{2}\to {}^{3}T{}_{1}(F)\) ESA band with the emission which extends from 1100 to about 1600 nm will significantly affect the laser performance of Cr4+ doped Ca2GeO4. The effective peak stimulated emission cross section at 1350 nm in Eb polarization is only about 3×10-20 cm2. However, our results indicate that tunable laser action between 1300 and 1500 nm should, in principle, be possible.

PACS: 42.70; 78.45; 78.50 

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Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • T.C. Brunold
    • 1
  • H.U. Güdel
    • 1
  • M.F. Hazenkamp
    • 1
  • G. Huber
    • 2
  • S. Kück
    • 2
  1. 1.Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland (Fax: +41-31/631-3993, E-mail: guedel@iac.unibe.ch)CH
  2. 2.Institut für Laser-Physik, Universität Hamburg, Jungiusstrasse 9a, D-20355 Hamburg, Germany (Fax: +49-40/4123-6281, E-mail: kueck@physnet.uni-hamburg.de)DE

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