Influence of the group-velocity mismatch in frequency conversion of picosecond pulses
R. A. Ganeev'Akadempribor' Research and Production Association, Academy of Science of Uzbekistan, Tashkent, UzbekistanT. Usmanov'Akadempribor' Research and Production Association, Academy of Science of Uzbekistan, Tashkent, Uzbekistan
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The efficiency of second-harmonic generation and the degree of compression of picosecond pulses from a neodymium glass laser were enhanced by a delay between ordinary and extraordinary pulses interacting in KDP crystals. The conversion efficiency was increased by a factor of 1.5 (from 33 to 50%) and the second-harmonic pulses were compressed by a factor of 2.4 (from 4.8 to 2 ps).
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