Parametric frequency converters with LiInSe2, AgGaGeS4, HgGa2S4 and Hg0.65Cd0.35Ga2S4 crystals

Yuri M. Andreev; Pavel P. Geiko; Valery V. Badikov; Vladimir L. Panyutin; Galina S. Shevyrdayeva; Maxim V. Ivaschenko; Alexander I. Karapuzikov; Igor V. Sherstov

doi:10.1117/12.497306

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28 March 2003 Parametric frequency converters with LiInSe₂, AgGaGeS₄, HgGa₂S₄ and Hg_0.65Cd_0.35Ga₂S₄ crystals

Yuri M. Andreev, Pavel P. Geiko, Valery V. Badikov, Vladimir L. Panyutin, Galina S. Shevyrdayeva, Maxim V. Ivaschenko, Alexander I. Karapuzikov, Igor V. Sherstov

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Proceedings Volume 5027, Ninth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics. Part II: Laser Sensing and Atmospheric Physics; (2003) https://doi.org/10.1117/12.497306
Event: Ninth Joint International symposium on Atmospheric and Ocean Optics, 2002, Tomsk, Russian Federation

Abstract

Second harmonic generation of 9 μm emission band of CO₂ laser is for the first time realized with a number of new nonlinear crystals: biaxial LiInSe₂, AgGaGeS₄ and uniaxial HgGa₂S₄, Cd_0.35,Hg_0.65Ga₂S₄. For LiInSe₂ and AgGaGeS₄ it is first type of frequency conversion realized some time or other. Main feature of this crystals is wide range transparency from 0.4-0.6 to 12.5-16.2 μm. Their damage thresholds for 30 ns TEA CO₂ laser pulses at 9.55 μm is determined as 1.7 to 2.3 times higher than for popular middle IR crystals such as ZnGeP₂ or AgGaSe₂. Parmateters of second harmonic generation were determined correctly in comparison with ZnGeP₂ crystals at 33 ns pump pulses and intensities that are about 28.5% of damage thresholds of ZnGeP₂. As high as 7% external peak power power efficiencies is typical for orange and yellow phases of 3.1 mm HgGa₂S₄ crystal at such pump that is only 13% of its damage threshold. Efficiencies as high as 0.45% and 0.3% are realized in 2.1 mm AgGaGeS₄ crystal at pump intensities that is only 11% of damage threshold. It was determined phase-matching angles, spectral dependence of second harmonic generation efficiencies, so as angular and spectral phase-matching widths that are investigated in details.

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Yuri M. Andreev, Pavel P. Geiko, Valery V. Badikov, Vladimir L. Panyutin, Galina S. Shevyrdayeva, Maxim V. Ivaschenko, Alexander I. Karapuzikov, and Igor V. Sherstov "Parametric frequency converters with LiInSe₂, AgGaGeS₄, HgGa₂S₄ and Hg_0.65Cd_0.35Ga₂S₄ crystals", Proc. SPIE 5027, Ninth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics. Part II: Laser Sensing and Atmospheric Physics, (28 March 2003); https://doi.org/10.1117/12.497306

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