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 1mm thickness KDP crystal at the peak intensity of 0.6TW/cm2 and the duration of 60fs.

© 2009 Optical Society of America

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