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Second-harmonic generation in surface periodically poled lithium niobate waveguides: on the role of multiphoton absorption

  • Autori: Cherchi, M.; Stivala, S.; Pasquazi, A.; Busacca, A.; RIVA SANSEVERINO, S.; Cino, A.; Colace, L.; Assanto, G.
  • Anno di pubblicazione: 2008
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • OA Link:


Second harmonic generation is investigated in lithium niobate channels realized by proton exchange and quasi-phase-matched by surface periodic-poling. The reduction in conversion efficiency at high powers is interpreted in terms of multi-photon absorption via two-color terms, yielding an estimate of the dominating three-photon process. Comment: 2 pages, 6 figures