Abstract
Frequency conversion efficiency depends not only on the nonlinear properties of the crystal but also on the beam conditions of the pump and converted fields. The conventionally defined figure of merit d2/n3 (d being the second-order nonlinearity and n the refractive index) in many cases does not accurately describe the conversion efficiency which should be also governed by (1) crystal acceptance width (angular, spectral, and temperature), (2) pump beam quality (spectral band-width and divergence), and (3) beam overlap of the pump and converted fields.
© 1989 Optical Society of America
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