Nonlinear pulse compression by the second-harmonic generation in quasiphase and group-velocity matched samples
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We investigate numerically the second-harmonic generation from near infrared 100 fs pulses in periodically and aperiodically poled lithium niobate crystals, taking into account the group-velocity mismatch, the group-velocity dispersion, and self-action effects. For the first time, we show that a tenfold pulse compression can be obtained at both fundamental and second-harmonic frequencies. The mechanism of compression and the pertinent quality factors are discussed.
Keywordsfrequency doubling nonlinear pulse compression quasiphase matching lithium niobate cascading parametric effects
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