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The spectral phase-matching bandwidths in LiIO3, LiNbO3, CDA, and KDP (type I and type II) for second harmonic generation (SHG) at 1.06 μm have been accurately measured using a tunable line-narrowed Nd : glass laser. The present results disagree with previously published data. Mechanisms such as sum-frequency generation which could contribute to the discrepancy are discussed and demonstrated in a 90° phase-matched deuterated CDA crystal.
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Yung S. Liu (1977) studied this question.
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