Abstract
An analysis is presented of a quasi-phasematched optical parametric oscillator and amplifier using rotationally-twinned CdTe and CdMnTe. The periodic structure of these crystals is shown to create gain for both the signal and idler wavelengths. The signal gain of a single pass optical parametric amplifier is shown to be insensitive to wavelength and to alignment of the crystal. These results show that a quasi-phasedmatched optical parametric oscillator or amplifier has distinctly different characteristics than a conventional birefringently phasematched device. An analysis of an oscillator pumping threshold was also performed to determine the minimum number of domains for useful operation. With modest improvements in the current state of the art, attractive devices may be constructed.
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