We demonstrate second-harmonic generation for various discrete input wavelengths by a controllable quasiphase matching method. This is done by forming ferroelectric domain gratings in SrxBa1−xNb2O6 crystals. The method allows flexible preparation of tailored quasiphase matching for prespecified wavelengths over prespecified bandwidths. Conversion efficiencies of 5% were achieved.
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Fischer et al. (1994) studied this question.
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