Article

Journal of Russian Laser Research

, Volume 32, Issue 1, pp 41-46

First online:

Nonlinear pulse compression by the second-harmonic generation in quasiphase and group-velocity matched samples

  • U. K. SapaevAffiliated withInstitute of Electronics, Academy of Sciences of Uzbekistan Email author 
  • , I. A. KulaginAffiliated withInstitute of Electronics, Academy of Sciences of Uzbekistan
  • , T. UsmanovAffiliated withInstitute of Electronics, Academy of Sciences of Uzbekistan
  • , G. AssantoAffiliated withNonlinear Optics and Optoelectronics Laboratory, University “Roma Tre”

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Abstract

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.

Keywords

frequency doubling nonlinear pulse compression quasiphase matching lithium niobate cascading parametric effects