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Ionin, A. A.; Kinyaevskiy, I. O.; Klimachev, Yu. M.; Kozlov, A. Yu; Kotkov, A. A.; Sagitova, A. M.; Sinitsyn, D. V.
Physics of atomic nuclei, 12/2021, Volume: 84, Issue: 10Journal Article
In this work, we experimentally study intracavity frequency conversion of CO laser radiation in a nonlinear ZnGeP 2 crystal under noncritical phase matching. Various configurations of a laser cavity are considered, in one of which the nonlinear crystal itself was an output mirror. The spectrum of the converted radiation was shifted into the short-wavelength region owing to the temperature tuning of the phase matching in the nonlinear crystal. The maximum average lasing power was obtained at room temperature of the crystal and an output mirror with a transmission T ~ 10% for the fundamental band and reached ~7.0 mW. The power ratio of sum frequency generation and the CO laser radiation was ~16%, which turned out to be higher than the value obtained earlier with the BaGa 2 GeSe 6 crystal (11.5%) at the same laser facility.
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