Picosecond 531 nm green and 385 nm violet light generation through first-order and third-order quasiphase matching (QPM) has been performed in a LiNbO3 optical superlattice. The conversion efficiency is 11.4% and 1.6%, respectively. A comparison between theoretical analyses and experimental results of frequency doubling peak value and full width at half-maximum for both the first- and third-order QPM are given. Possible simultaneous generation of green and violet light in the crystal are predicted for constructing a compact two outputting wavelengths light source.
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Lu et al. (1994) studied this question.
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