Phase-Matched Second Harmonic Generation in a flux grown KTiOPO4 crystal ridge optical waveguide

TL;DR

This paper demonstrates efficient phase-matched second harmonic generation in a flux-grown KTiOPO4 ridge waveguide, combining theoretical predictions with experimental validation, advancing integrated parametric optics applications.

Contribution

It presents the first experimental realization of phase-matched SHG in a flux-grown KTiOPO4 ridge waveguide with theoretical and experimental agreement.

Findings

Strong agreement between theory and experiment on phase-matching wavelengths

High second-harmonic intensity achieved in the waveguide

Potential for integrated parametric optical devices

Abstract

Type II second-harmonic generation was performed in a 15.8-mm-long KTiOPO4 micrometric ridge waveguide with an average transversal section of 38 micrometer^2. Theoretical predictions are compared with experiments. Strong agreements are obtained for both phase-matching wavelengths and second-harmonic intensity. This work opens wide perspectives for integrated parametric optics.