Abstract

We report an increase in the conversion efficiency from ≈40% to ≈75% for type II frequency doubling of 1.053-μm, 1.6-ps-duration pulses in KDP when a delay of ≈1.45 ± 0.1 ps between the extraordinary and ordinary pulses is introduced at the input to the doubling crystal. The delay compensates for the effect of group-velocity dispersion in the crystal with the result that the effective interaction length in the crystal is approximately doubled.

© 1991 Optical Society of America

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