Broadband sum-frequency conversion of multiline Q-switched CO laser emission under its double-pass through AR-coated ZnGeP2 crystal

被引：0
|
作者：
Kinyaevskiy I.O. [1 ,2 ]
Klimachev Y.M. [1 ]
Ionin M.V. [1 ]
Sagitova A.M. [1 ]
Zinovev M.M. [2 ,3 ]
Yudin N.N. [2 ,3 ]
Ionin A.A. [1 ]
机构：
[1] Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Ave., Moscow
[2] National Research Tomsk State University, 36 Lenin Ave, Tomsk
[3] LOC LLC, 28 Vysotsky Str., Tomsk
来源：
Optical and Quantum Electronics | 2024年 / 56卷 / 03期
基金：
俄罗斯科学基金会;
关键词：
AR-coated ZnGeP[!sub]2[!/sub; Broadband mid-IR laser; CO laser; Double-pass scheme; Sum-frequency generation;
D O I：
10.1007/s11082-023-06112-w
中图分类号：
学科分类号：
摘要：
Broadband sum-frequency conversion of multiline (~ 60 spectral lines within ~ 5–6 μm wavelength interval) Q-switched CO laser emission in an AR-coated ZnGeP2 crystal was experimentally studied by application of both single-pass and double-pass optical schemes. The maximum conversion efficiency in the double-pass scheme reached ~ 10% that is 2.5 times higher than one obtained in the same optical scheme with an uncoated ZnGeP2. The spectrum control of frequency converted radiation by changing angles of incident and reversed CO laser beams in the ZnGeP2 crystal was implemented within the wavelength range from 2.52 μm up to 2.92 μm. The maximum spectrum width of 0.35 μm was obtained with the double-pass scheme when the angle of the laser beam incident on the crystal and the angle of the deflected reversed laser beam were −4.0° and 1.0°, respectively, the spectral bandwidth being three times broader than one obtained with the single-pass scheme. © 2024, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
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