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Lasers
Broadband sum-frequency generation of a CO laser in antireflection-coated and uncoated ZnGeP2 crystals
I. O. Kinyaevskyab, Yu. M. Klimacheva, M. V. Ionina, A. M. Sagitovaa, M. M. Zinovievbc, N. N. Yudinbc, S. N. Podzyvalovbc, A. A. Ionina a Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia
b National Research Tomsk State University, 634050, Tomsk, Russia
c LLC "Laboratory of Optical Crystals", 634040, Tomsk, Russia
Abstract:
We report an experimental study of broadband sum-frequency generation of a nonselective Q-switched CO laser (pulse duration, ∼0.3 μs; repetition rate, ∼90 Hz) in ZnGeP2 crystals with and without an antireflective interference coating. The uncoated crystal surface is found to be optically damaged at a laser radiation intensity of 0.033 GW/cm2. Under the same conditions, no damage to the antireflection-coated surface of the crystal is observed. The maximum efficiency of broadband sum-frequency generation of the CO laser in the antireflection-coated sample is 4.8% and turns out to be two times higher than in the uncoated sample. The spectral characteristics of the radiation at sum frequencies do not change in using antireflection-coated and uncoated samples.
Keywords:
ZnGeP2 crystal, second harmonic generation, sum-frequency generation, CO laser.
Received: 14.08.2023 Revised: 25.09.2023
Citation:
I. O. Kinyaevsky, Yu. M. Klimachev, M. V. Ionin, A. M. Sagitova, M. M. Zinoviev, N. N. Yudin, S. N. Podzyvalov, A. A. Ionin, “Broadband sum-frequency generation of a CO laser in antireflection-coated and uncoated ZnGeP2 crystals”, Kvantovaya Elektronika, 53:8 (2023), 631–635 [Bull. Lebedev Physics Institute, 50:suppl. 12 (2023), S1341–S1347]
Linking options:
https://www.mathnet.ru/eng/qe18317 https://www.mathnet.ru/eng/qe/v53/i8/p631
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Abstract page: | 50 | References: | 8 | First page: | 3 |
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