Abstract
We have experimentally determined the spectrally noncritical phase-matching behavior of type I frequency doubling in potassium dihydrogen phosphate (KDP) and its dependence on deuteration level in partially deuterated KD*P. Our results are in agreement with predictions based on available refractive-index data. The first-order wavelength-sensitivity parameter ∂Δk/∂λ for type I doubling of 1.053-μm light vanishes for a KD*P crystal with a deuteration level of 12 ± 2%. Calculations of this effect in other KDP analogs are presented, and the possibility of finding materials that have spectrally noncritical behavior for other phase-matched processes is discussed.
© 1992 Optical Society of America
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