Abstract
The ZnGeP2 monocrystals have high nonlinear figure of merit, third after Te and CdGeAs2. ZnGeP2 is sufficiently birefringent (B = + 0.04) for three-frequency matching mixing practically all over the transmission range. However, mainly due to low optical transmission of the monocrystals available, the experimental studies of frequency converters (FC) have been limited until recently to approbation of the CO2 laser radiation up-[1] and downconverters [2].
© 1987 Optical Society of America
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