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

Abstract

We carried out second-harmonic generation in quasi-phase-matched α-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.

References in corpus (2)

• Surface domain engineering in congruent lithium niobate single crystals: A route to submicron periodic poling
• First-order quasi-phase-matched blue light generation in surface-poled Ti:indiffused lithium niobate waveguides

Cited by in corpus (1)

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