Characterization of nonlinear optical parameters of KDP,LiNbO3 and BBO crystals |
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| Institution: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. Department of Electrical Engineering, Malaviya National Institute of Technology, Jaipur;2. Department of Electrical Engineering, Poornima Group of Colleges, Jaipur;1. Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of the Chinese Academy of Sciences, Beijing 100049, PR China;3. Institute of Functional Crystal Materials, Tianjin University of Technology, Tianjin 300384, PR China;1. Department of Physics, Saurashtra University, Rajkot 360005, India;2. Centre for Crystal Growth, School of Advanced Sciences, VIT University, Vellore 632014, India;3. Department of Physics, Shri M.P.Shah Arts & Science College, Surendranagar 363001, India |
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| Abstract: | Third-order nonlinear susceptibilities (χ(3)) and nonlinear refractive indices (n2) of KDP, BBO and LiNbO3 crystals are measured at the wavelengths of 1064 nm and 532 nm by Z-scan technique. The measurements were carried out at different pulse energies, focusing conditions, and crystals’ lengths. It was shown that the increase of phase-matching angle leads to the decreasing of χ(3) of KDP crystals. The parameters of multi-photon absorption in KDP, BBO and LiNbO3 crystals are determined. The analysis and comparison of experimental and theoretical values of nonlinear susceptibilities are presented. |
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