Abstract
The first demonstration of a zinc germanium phosphide (ZnGeP2) infrared optical parametric oscillator is reported. Continuous OPO output was observed from 4.7 to 6.9 microns, with peak output at 5.3 microns. OPO threshold was 18 MW/cm2, with up to 150 micro-joules measured within a 5-7 nanosecond pulsewidth. Overall optical efficiency of this experiment was 7%, presently limited due to the available pump intensity and resonator optics. A Type I ZnGeP2 OPO offers continuous wavelength tuning through out the mid IR spectrum (3 - 10 microns) under either 2.0 or 2.8 micron pumping.
© 1991 Optical Society of America
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