Origin of athermal refractive index changes observed in Yb3+ doped YAG and KGW

Time-resolved excited-state absorption and fluorescence measurements were performed in the Yb3+ doped YAG and KGW laser crystals. The results indicate that the athermal refractive index changes observed in previous transient interferometric and diffraction grating experiments can be related to polar...

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Bibliographic Details
Published in:Optics communications 2008-05, Vol.281 (9), p.2526-2530
Main Authors: Moncorgé, R., Eremeykin, O.N., Doualan, J.L., Antipov, O.L.
Format: Article
Language:English
Subjects:
42.55R
42.70
Charge transfer
Laser material
Optics
Physics
Refractive index
Ytterbium
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Summary:Time-resolved excited-state absorption and fluorescence measurements were performed in the Yb3+ doped YAG and KGW laser crystals. The results indicate that the athermal refractive index changes observed in previous transient interferometric and diffraction grating experiments can be related to polarisability changes caused by the existence of strong UV charge transfer absorption bands.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2007.12.093