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Proceedings Paper

Cylindrical wave of reflection and conduction in IR transparent BaF2 single crystal excited by 2.5 s duration pulse of CO2 laser
Author(s): Eugene M. Kudriavtsev; Franck Guignard; G. Inglesacis; Michel L. Autric
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Paper Abstract

Experiments on optical damage testing by help of 2.5 microsecond(s) , approximately 0.1 J single pulse of 10.6 (mu) CO2 laser showed the appearance of cylindrical geometry WRC in BaF2 single crystal approximately 50 percent transparent for this radiation. It was measured the reflection variations of the He-Ne beam transmitted through the sample at the 30 degree angle to the IR laser axes and crossing it. The nonequilibrium heating of the sample along IR beam axes produced the heat lens and as a consequence the focusing of the He-Ne beam. The cylindrical WRC cross the focused He-Ne beam area and it gives the well pronounced bell shape peak, additional to the analogous reflection variation records made at conditions where He-Ne beam did not cross IR laser axes. The time of focused He-Ne beam crossing by WRC is 40 ms, which correspond to approximately 0.6 mm diameter of focused a beam. One can make conclusions about local optical constants changing inside of solid sample by help of reflection variations in WRC. This work was sponsored by RFBR.

Paper Details

Date Published: 20 April 1998
PDF: 4 pages
Proc. SPIE 3244, Laser-Induced Damage in Optical Materials: 1997, (20 April 1998); doi: 10.1117/12.307007
Show Author Affiliations
Eugene M. Kudriavtsev, P.N. Lebedev Physical Institute (Russia)
Franck Guignard, Univ. of Marseilles (France)
G. Inglesacis, Univ. of Marseilles (France)
Michel L. Autric, Univ. of Marseilles (France)

Published in SPIE Proceedings Vol. 3244:
Laser-Induced Damage in Optical Materials: 1997
Gregory J. Exarhos; Arthur H. Guenther; Mark R. Kozlowski; M. J. Soileau, Editor(s)

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