Excited state absorption measurements and laser potential of Cr4+ doped Ca2GeO4 |
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| Authors: | TC Brunold HU Güdel MF Hazenkamp G Huber S Kück |
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| Institution: | Departement für Chemie und Biochemie, Universit?t Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland (Fax: +41-31/631-3993, E-mail: guedel@iac.unibe.ch), CH
Institut für Laser-Physik, Universit?t Hamburg, Jungiusstrasse 9a, D-20355 Hamburg, Germany (Fax: +49-40/4123-6281, E-mail: kueck@physnet.uni-hamburg.de), DE
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| Abstract: | 4+ doped Ca2GeO4 in the 450–2000 nm spectral region at room temperature are presented. Weak ESA bands due to the transition are observed between 1200 and 2000 nm and stronger ESA bands due to peak below 1200 nm. The overlap of the 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 E∥b 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.
Received: 28 October 1996 |
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| Keywords: | PACS: 42 70 78 45 78 50 |
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