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.
Stivala, S., Pasquazi A, Colace L, Assanto G, Busacca A C, Cherchi M, et al. (2007). Guided-wave frequency doubling in surface periodically poled lithium niobate: competing effects. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS, 24, 1564-1570.
Guided-wave frequency doubling in surface periodically poled lithium niobate: competing effects
STIVALA, Salvatore;BUSACCA, Alessandro;CHERCHI, Matteo;RIVA SANSEVERINO, Stefano;CINO, Alfonso Carmelo;PARISI, Antonino
2007-01-01
Abstract
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.
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