Abstract
A new method for measuring third-order nonlinear optical properties of photo refractive materials based on modified Z-scan technique in which employing focus-tunable lens was proposed. By this method, the nonlinear refractive index and the nonlinear absorption coefficient of an undoped \({\text{LiNb}}{{\text{O}}_{\text{3}}}\) crystal were investigated \(\gamma = - 1.48 \times {10^{ - 12}}\;{{\text{m}}^{\text{2}}}{\text{/W}}\) and \(\beta = 0.33\;{\text{mm/W}}\), respectively. The investigation suggests that the calculated results keep agreement with the traditional Z-scan technique in the order of magnitude.
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The authors are thankful to the Natural Science Foundation of Shandong Province (CN) (Award Number: ZR2013AM020).
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Wen, J., Gao, C.Y., Yu, H.T. et al. Investigation on third-order nonlinear optical properties of undoped LiNbO3 by modified Z-scan technique. Appl. Phys. B 123, 85 (2017). https://doi.org/10.1007/s00340-017-6668-0
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DOI: https://doi.org/10.1007/s00340-017-6668-0