Theoretical estimates and experimental results of the study of the second harmonic oscillation in nonlinear GaSe and GaSe:S crystals excited by a 10.6-μm CO2 laser are presented. The measured second harmonic maximum radiation power and power conversion efficiency for GaSe crystals were 8 kW and 0.5%, respectively. Data on the damage thresholds for GaSe and GaSe0.7S0.3 crystals irradiated by a CO2 laser are presented.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 65–70, September, 2010.
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Bereznaya, S.A., Genin, D.E., Korotchenko, Z.V. et al. Second harmonic oscillation produced by pumping GaSe and GaSe0.7S0.3 crystals with 10.6-μm pulsed CO2 laser radiation. Russ Phys J 53, 949–955 (2011). https://doi.org/10.1007/s11182-011-9515-5
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DOI: https://doi.org/10.1007/s11182-011-9515-5