Investigation of the efficiency of second harmonic generation by two types of interaction and optimization of laser radiation parameters

Volosov, V. D.; Malinin, B. G.; Pankov, V. G.

doi:10.1070/qe1982v012n01abeh005251

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2012

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“…Highly coherent radiation is most effectively converted into the second harmonic, and under certain experimental conditions, the highest possible conversion coefficients have been attained [4,12,13]. The SHG has been well studied for a wide spectrum of radiation containing one transverse and many longitudinal modes [12,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical conversion of Nd:glass laser multimode radiation into the second harmonic in KDP crystal

Dmitriev

Осипов

Puzyrev

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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The second-harmonic generation (SHG) of Nd:glass multimode laser radiation in a 3 cm long KDP crystal has been studied both experimentally and theoretically for type I doubling at power densities of up to 2.5 GW cm −2 , radiation divergence of 0.5-3.5 mrad and between 100-1000 transverse modes. The theoretical calculations of SHG were performed in the fixed-field approximation, fixed-intensity approximation and in the nonlinear regime. The maximum experimental conversion efficiency of 52% was obtained for the case of partially polarized radiation with divergence of 0.5 mrad and 100 transverse modes.

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