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Mechanisms of multiple shot bulk damage of silicate glasses with and without conditions of multiphoton absorption
Author(s): Oleg M. Efimov; O. N. Bosyi; Leonid B. Glebov; M. J. Soileau
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Paper Abstract

Accumulation effect in silicate glasses under single frequency laser radiation (0.53 and 1.06 micrometers ) has been investigated. It is shown that this effect in lead silicate glasses at 0.53 micrometers is the result of the multiphoton matrix ionization, the accumulation of color centers and radiation absorption by them, and the decrease of thermal self- focusing threshold. However, under radiation at 1.06 micrometers in the same materials the multiphoton ionization and color centers formation are not observed. It is established that in this case accumulation effect is connected with densification of glasses in the interaction bulk. This densification is the result of the action of large electrostrictional pressure. It leads to the modification of physical properties of glasses without electronic excitations and the decrease of the self-focusing threshold. In this connection, the accumulation effect takes place only if electrostrictional pressure exceeds threshold value of pressure required to densification of glasses.

Paper Details

Date Published: 14 July 1995
PDF: 7 pages
Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); doi: 10.1117/12.213768
Show Author Affiliations
Oleg M. Efimov, S.I. Vavilov State Optical Institute (Russia)
O. N. Bosyi, S.I. Vavilov State Optical Institute (Russia)
Leonid B. Glebov, S.I. Vavilov State Optical Institute (Russia)
M. J. Soileau, CREOL/Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 2428:
Laser-Induced Damage in Optical Materials: 1994
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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