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- Title
Broadband sum-frequency conversion of multiline Q-switched CO laser emission under its double-pass through AR-coated ZnGeP<sub>2</sub> crystal.
- Authors
Kinyaevskiy, I. O.; Klimachev, Yu. M.; Ionin, M. V.; Sagitova, A. M.; Zinovev, M. M.; Yudin, N. N.; Ionin, A. A.
- Abstract
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.
- Subjects
Q-switched lasers; LASER beams; SPECTRAL lines; CRYSTALS; FREQUENCY spectra; RADIATION
- Publication
Optical & Quantum Electronics, 2024, Vol 56, Issue 3, p1
- ISSN
0306-8919
- Publication type
Article
- DOI
10.1007/s11082-023-06112-w