High-efficiency second-harmonic generation of superintense ultrashort laser pulses

Abstract

The effect of instantaneous cubic nonlinearity on second-harmonic generation of femtosecond laser pulses is investigated. The possibility of improving generation efficiency and shortening pulse duration is analyzed. Energy conversion efficiency of 60% was obtained in an experiment in a $1\mathrm{mm}$ thickness KDP crystal at the peak intensity of $0.6\mathrm{TW}/{\mathrm{cm}}^2$ and the duration of $60\mathrm{fs}$.

© 2009 Optical Society of America

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