Abstract.
A simple, approximate relation between the dispersion of the second-order nonlinear optical (SNLO) coefficient and first-order susceptibility has been derived using the well-known results of density-matrix calculation of quantum-mechanical theory. A new tensor of SNLO coefficient has been defined, which retains symmetries when the input beams are in the spectral range of transparency while the generated beam can also be in the spectral range of absorption. The validity of the relation has been checked for three ferroelectric crystals, KTP, LiNbO3 and KNbO3, which are transparent in the visible and near infrared, and for two semiconductors, GaP and GaAs, which absorb in the visible. Contrary to Miller’s law, the presented relation is in good agreement with measurements.
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Received: 8 February 2001 / Revised version: 2 July 2001 / Published online: 10 October 2001
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Seres, J. Dispersion of second-order nonlinear optical coefficient. Appl Phys B 73, 705–709 (2001). https://doi.org/10.1007/s003400100651
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DOI: https://doi.org/10.1007/s003400100651