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Efficient generation of the second and third harmonics of high-power femtosecond Yb:KGW-laser radiation in nonlinear-optical BBO crystals
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Publication in Journal of Optical Technology
G. H. Kim, J. Yang, B. Lee, Салль Е.Г., Чижов С.А., Калинцев А.Г., Яшин В.Е., Uk. Kang Эффективная генерация второй и третьей гармоник излучения мощного фемтосекундного лазера на Yb:KGW в нелинейно-оптических кристаллах BBO // Оптический журнал. 2016. Т. 83. № 8. С. 17–22.
G. H. Kim, J. Yang, B. Lee, Sall E.G., Chizhov S.A., Kalintsev A.G., Yashin V.E., Uk. Kang Efficient generation of the second and third harmonics of high-power femtosecond Yb:KGW-laser radiation in nonlinear-optical BBO crystals [in Russian] // Opticheskii Zhurnal. 2016. V. 83. № 8. P. 17–22.
G. H. Kim, J. Yang, B. Lee, E. G. Sall’, S. A. Chizhov, A. G. Kalintsev, V. E. Yashin, and U. Kang, "Efficient generation of the second and third harmonics of high-power femtosecond Yb:KGW-laser radiation in nonlinear-optical BBO crystals," Journal of Optical Technology. 83(8), 463-467 (2016). https://doi.org/10.1364/JOT.83.000463
The frequency conversion of radiation into the second and third harmonics of a high-power femtosecond laser based on Yb:KGd(WO4)2 (Yb:KGW) crystals in BBO (β-BaB2O4) crystals has been experimentally and quantitatively investigated. Under the optimum compression conditions of femtosecond pulses of width 300 fs, the conversion efficiency into the second harmonic reached 50%, and that into the third harmonic reached 20%. The introduction of additional phase modulation reduced the generation efficiency of the second harmonic to an extent that is different for positive and negative signs of the phase modulation. The results of numerical calculations quantitatively agree with the experimental results.
femtosecond pulses, Yb:KGW, frequency conversion, second harmonic, third harmonic
Acknowledgements:This work was carried out with the financial support of the government of the city of Seoul under a research contract of program WR100001. V. E. Yashin expresses gratitude to the Ministry of Education, Science and Technology (MEST) andto the Korean Federation of Science and Technology Societies (KOFST) for financial support via the Brain Pool Program.
OCIS codes: 140.3480, 140.7090
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