Effect of nonlinear refraction and two-photon absorption on the optical limiting in amorphous chalcogenide films |
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| Authors: | R A Ganeev A I Ryasnyanskii T Usmanov |
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| Institution: | (1) Akadempribor Research and Production Association, Academy of Sciences of Uzbekistan, Tashkent, 700143, Uzbekistan;(2) Samarkand State University, Samarkand, 703004, Uzbekistan |
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| Abstract: | This paper reports on the results of investigations into the nonlinear optical characteristics of chalcogenide films (As2S3, As20S80, 2As2S3/As2Se3, 3As2S3/As2Se3). The nonlinear refractive indices and two-photon absorption coefficients for these films are measured using the Z-scan technique at wavelengths of a picosecond Nd: YAG laser (λ=1064 and 532 nm). The optical limiting due to Kerr-type nonlinearities is analyzed. |
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