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Guided-wave frequency doubling in surface periodically poled lithium niobate: competing effects

  • Autori: Stivala, S.; Pasquazi, A.; Colace, L.; Assanto, G.; Busacca, A.; Cherchi, M.; RIVA SANSEVERINO, S.; Cino, A.; Parisi, A.
  • Anno di pubblicazione: 2007
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • Parole Chiave: Harmonic generation and mixing; Nonlinear optics, integrated optics
  • OA Link:


We carried out second-harmonic generation in quasi-phase-matched alpha-phase lithium niobate channel waveguides realized by proton exchange and surface periodic poling. Owing to a limited ferroelectric domain depth, we could observe the interplay between second-harmonic generation and self-phase modulation due to cascading and cubic effects, resulting in a nonlinear resonance shift. Data reduction allowed us to evaluate both the quadratic nonlinearity in the near infrared as well as the depth of the uninverted domains.