Nonlinear light absorption and luminescence in silicate glasses
M. A. KasymdzhanovDepartment of Thermal Physics, Academy of Sciences of Uzbekistan, Tashkent, 700135, UzbekistanS. S. KurbanovDepartment of Thermal Physics, Academy of Sciences of Uzbekistan, Tashkent, 700135, UzbekistanP. K. KhabibullaevDepartment of Thermal Physics, Academy of Sciences of Uzbekistan, Tashkent, 700135, Uzbekistan
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Abstract
The study of luminescence of high-purity multicomponent silicate glasses excited by radiation of a N2 laser (λ=337 nm, P≈12kW) showed darkening of a sample and a monotone decrease in luminescence intensity and the transmitted radiation intensity from pulse to pulse. Additional illumination with radiation of an Ar+ laser (λ=514.5 nm) caused an increase in luminescence intensity. An increase in absorption and a decrease in luminescence intensity were found to be caused by two-photon absorption and electron-hole pair production.
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