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To improve the frequency-doubling efficiency in type II second-harmonic generation (SHG), a fundamental walkoff-compensated SHG scheme was geometrically analyzed and its usefulness was experimentally demonstrated in a 12-mm length of KTiOPO(4) with 20% power enhancement and in a 10-mm length of LiB(3)O(5) with double enhancement.
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Katsu Asaumi (1998) studied this question.
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