Photostructural transformation of chalcogenide glasses under nonlinear absorption of laser radiation

Oleg M. Efimov; Yurii A. Matveev; Andrei M. Mekryukov; A. V. Belykh; Leonid B. Glebov; Mikhail D. Mikhailov; M. J. Soileau

doi:10.1117/12.239749

6 May 1996 Photostructural transformation of chalcogenide glasses under nonlinear absorption of laser radiation

Oleg M. Efimov, Yurii A. Matveev, Andrei M. Mekryukov, A. V. Belykh, Leonid B. Glebov, Mikhail D. Mikhailov, M. J. Soileau

Author Affiliations +

Proceedings Volume 2796, ICONO '95: Fundamentals of Laser-Matter Interaction; (1996) https://doi.org/10.1117/12.239749
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

The photoinduced change of transmittancy of chalcogenide glasses was investigated under exposure to the laser radiation at 1.064 and 1.318 micrometer. It was established that two- photon absorption in these glasses arises under exposure to radiation with irradiances of greater than or equal to 10⁸ W/cm². It results in irreversible structural transformation of the glasses in the interaction region. This process has threshold character over a narrow range of radiation irradiance (plus or minus 0.1I_thr) and results in appearance of a small-dispersion phase in the bulk glass. Formation of such regions has fluctuating character and causes the appearance of strong light scattering. The effect observed is similar phenomenologically to the known effect of photo-structural transformations in the thin films under exposure to near bandgap light. However, in contrast to the last, the emerged changes of the glass properties are not erased completely by the annealing at the glass transition temperature.

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Oleg M. Efimov, Yurii A. Matveev, Andrei M. Mekryukov, A. V. Belykh, Leonid B. Glebov, Mikhail D. Mikhailov, and M. J. Soileau "Photostructural transformation of chalcogenide glasses under nonlinear absorption of laser radiation", Proc. SPIE 2796, ICONO '95: Fundamentals of Laser-Matter Interaction, (6 May 1996); https://doi.org/10.1117/12.239749

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