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Proceedings Paper

248 nm high fluence irradiation of CaF2 crystals
Author(s): Alfons Burkert; Dietmar Keutel; Ute Natura
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Paper Abstract

Transmission, absorption and laser induced fluorescence (LIF) measurements were performed to reveal the applicability of different grade CaF2 for 248 nm laser applications. No emission from self-trapped excitions could be found in LIF measurements after irradiation with 100k pulses for all grades. Therefore, three-photon excitation could be excluded up to 1 J/cm2. Whereas emission at 420 nm and partially the double-peak at 313/333 nm could be found in LIF measurements. UV-VIS difference spectra did not show any absorption bands after 248 nm irradiation of the samples. Optical elements from CaF2 promise high life expectancy at 248 nm if a standard laser polish is used and hot spots are avoided.

Paper Details

Date Published: 20 December 2007
PDF: 5 pages
Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 67201K (20 December 2007); doi: 10.1117/12.752813
Show Author Affiliations
Alfons Burkert, Institut für Photonische Technologien e.V. (Germany)
Dietmar Keutel, Schott Lithotec AG (Germany)
Ute Natura, Schott Lithotec AG (Germany)

Published in SPIE Proceedings Vol. 6720:
Laser-Induced Damage in Optical Materials: 2007
Gregory J. Exarhos; Arthur H. Guenther; Keith L. Lewis; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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