OPTICAL THIRD HARMONIC GENERATION USING MODE-LOCKED AND NONMODE-LOCKED LASERS

Abstract
Optical third harmonic generation in ADP crystals has been studied both in reflection and along the phase‐matched direction. Results with a mode‐locked laser indicate that only a small fraction (∼4%) of the total energy per laser shot was associated with the picosecond spikes in the laser output. This suggests that the peak power associated with the picosecond pulses may have been grossly overestimated in some cases.