Efficient conversion of picosecond laser pulses into second-harmonic frequency using group-velocity dispersion
- 1 May 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 41 (10) , 5645-5649
- https://doi.org/10.1103/physreva.41.5645
Abstract
A computer model has been used to investigate frequency doubling of 1-psec duration high-power pulses in potassium dihydrogen phosphate (KDP) for type-II phase matching. It has been found that group-velocity dispersion can be used to advantage by predelaying the ordinary and extraordinary polarizations appropriately in a thin KDP crystal with its axes aligned at 90° to the main conversion crystal. In that situation power conversion >100% from the fundamental to the second harmonic can be obtained with simultaneous ‘‘compression’’ of the output pulse duration by up to a factor of 5.Keywords
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