A noncollinear second-harmonic-generation scheme that includes two gratings
and a nonlinear optical crystal generates temporal solitons with a noncoll
inear phase mismatch and frequency-chirped laser pulses. At 180-fs pulse du
ration, 25-GW/cm(2) fundamental intensity, -7647.3-m(-1) wave-vector mismat
ch, 66-fs delay time, and +/-3.07163 x 10(25) s(-2) frequency-chirp rates,
temporal solitons with durations from 139 to 155 fs and Gaussian shapes can
be obtained. The corresponding conversion efficiency is greater than 40%.
(C) 2001 Optical Society of America.