Laser-induced generation of structural defects in vitreous silica and in activated silicate glass

Ruptures of a silica network in a 1.06 μm-laser irradiated vitreous silica and activated silicate glass were observed by infrared and Raman spectroscopy. Irradiation conditions were so chosen that the laser beam should not produce visible traces of damage in the sample bulk or on the surface. The fo...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1985-01, Vol.70 (1), p.45-53
Main Authors: Chmel, Alexandre, Eronko, S.B.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Glasses
Special glasses
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Summary:Ruptures of a silica network in a 1.06 μm-laser irradiated vitreous silica and activated silicate glass were observed by infrared and Raman spectroscopy. Irradiation conditions were so chosen that the laser beam should not produce visible traces of damage in the sample bulk or on the surface. The formation of broken chemical bonds was found not to be of threshold character, but the effect increases sharply as the power density in a laser pulse grows. The dependence of the concentration of newly formed ruptures on the number of repeated pulses exhibits a saturation and represents a kinetic curve of chemical bond destruction in a glass. It is assumed that the accumulation process is the cause of macroscopic breakdown of transparent dielectrics under repated laser irradiation.
ISSN:0022-3093
1873-4812
DOI:10.1016/0022-3093(85)90092-4