Abstract
The characteristics of parametric light generators with intracavity pumping by the radiation of a garnet laser with a passive shutter have been experimentally investigated. The conversion efficiency of laser radiation with a wavelength of λ<sub>p</sub>=1.064μm strongly depends on the characteristics of the phototropic shutter. When a radiation-colored LiF crystal with initial transmittance T<sub>0</sub>=0.25 is used in a parametric generator based on a potassium titanyl phosphate crystal at a wavelength of λ<sub>s</sub>=1.91μm, a radiation energy of up to 10 mJ and a quantum efficiency of radiation conversion of H<sub>q</sub>≈0.6 are achieved. When a YAG:Cr<sup>4+</sup> shutter with T<sub>0</sub>=0.5 was used, the maximum radiation energy of the parametric generator was 5 mJ, while the conversion efficiency was H<sub>q</sub>≈0.3-0.4. In a parametric generator based on potassium titanyl arsenate crystal with λ<sub>s</sub>=1.55μm, the radiation energies corresponding to these shutters were about 7.5 and 5 mJ, while H<sub>q</sub>≈0.4-0.6 and 0.25-0.4, respectively.
© 2009 Optical Society of America
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