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1 August 1991 Photoinductional change of silicate glasses optical parameters at two-photon laser radiation absorption
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Proceedings Volume 1513, Glasses for Optoelectronics II; (1991)
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands
The mechanisms of photo-inductional change of the alkali-silicate and lead-silicate glasses optical parameters upon exposure to the intense laser radiation with Eg/2 < h(nu) < Eg (Eg is the glass matrix ionization potential) has been studied. It is shown that under these conditions the color centers accumulation and fundamental luminescence are observed owing to two-photon ionization of a glass matrix. The saturation value of additional absorption is dependent on the irradiance of laser radiation. It is defined by the dynamic equilibrium between two-photon absorption and one-photon discoloration of color centers. This effect may be used for bulk holograms recorded in the colored glasses. It was found that the process of two-photon generation of charge carriers affects the increase of absorption in a wide spectral range as well as the change of the refractive index of glass. These effects essentially decrease the brightness of the laser radiation passing through the medium, even for samples less than 1 mm thick. On the basis of the analysis of the characteristics of fundamental and impure luminescence, the kinetics of color centers formation and decay, and the kinetics of refractive index change under conditions of two-photon glass matrix excitation, the available mechanisms of photo-inductional changes of glass optical parameters are offered.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Leonid B. Glebov, Oleg M. Efimov, and Andrei M. Mekryukov "Photoinductional change of silicate glasses optical parameters at two-photon laser radiation absorption", Proc. SPIE 1513, Glasses for Optoelectronics II, (1 August 1991);

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