We propose a simple means for compressing optical pulses with second-harmonic
generation. Aperiodic quasi-phase-matching gratings impart a frequency-dependent
phase shift on the second-harmonic pulse relative to the fundamental pulse
and can be engineered to correct for arbitrary phase distortions. The mechanism
is discussed, and a detailed analysis of the compression of quadratic phase
(linear frequency) chirped pulses is presented.
© 1997 Optical Society of America
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