Abstract

A theoretical treatment of group-velocity dispersion and higher-order dispersion effects on the second-harmonic-generation (SHG) process with longitudinally nonuniform quasi-phase-matching (QPM) gratings is presented. We show how these dispersion terms can be accounted for in the design of a QPM-SHG pulse shaper. Our numerical simulation results show that, if the proper dispersion correction is included in the QPM grating design, one can generate sub-10-fs transform-limited pulses at 400 nm by doubling the output of a Ti:sapphire oscillator.

© 2000 Optical Society of America

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