Spatial and spectral properties of the pulsed second-harmonic generation in a PP-KTP waveguide

TL;DR

This paper analyzes the spatial and spectral characteristics of pulsed second-harmonic generation in a PP-KTP waveguide, revealing correlations and effects of waveguide parameters through experimental and finite element modeling.

Contribution

It introduces a comprehensive analysis of spatial and spectral properties in pulsed SHG in PP-KTP waveguides, combining experimental data with finite element modeling.

Findings

Correlations between spatial and spectral properties of fundamental and second-harmonic fields.

Individual nonlinear processes can be selectively exploited using spatial and spectral filtering.

Waveguide parameters significantly influence the second-harmonic spectra.

Abstract

Spatial and spectral properties of the pulsed second harmonic generation in a periodically-poled KTP waveguide exploiting simultaneously the first, second, and third harmonics of periodic nonlinear modulation are analyzed. Experimental results are interpreted using a model based on finite elements method. Correlations between spatial and spectral properties of the fundamental and second-harmonic fields are revealed. Individual nonlinear processes can be exploited combining spatial and spectral filtering. Also the influence of waveguide parameters to the second-harmonic spectra is addressed.