Features of nonstationary SHG of phase-modulated laser pulses under self-action conditions
I. A. Kulagin'Akadempribor' Research and Production Association, Academy of Science of Uzbekistan, Tashkent, UzbekistanУ. К. Сапаев'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 influence of self-action effects on the efficiency of SHG of phase-modulated laser pulses in a nonstationary regime is analysed using a generalised method of strong interaction of nonlinear waves. An analytic solution for the SHG efficiency is obtained taking into account the depletion of pump radiation, the influences of the linear phase mismatch, mismatch of group velocities, and higher linearities. It is shown that the effects of self-action, mismatch of group velocities, and linear phase mismatch can compensate for each other, resulting in an increase in the efficiency of SHG of phase-modulated pulses.
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