Directional quasi-phase matching AlGaAs waveguide microresonators for efficient generation of quadratic frequency combs
Authors: Parisi M., Ricciardi I., Mosca S., Morais N., Hansson T., Wabnitz S., Leo G., De Rosa M.
Autors Affiliation: CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; Laboratoire Materiaux et Phenomenes Quantiques, Universite Paris Diderot & CNRS,Sorbonne Paris Cite, 10 rue Domon et Duquet, 75205 Paris cedex 13, France; INRS-EMT, 1650 Blvd. Lionel-Boulet, Varennes, Quebec J3X 1S2, Canada; Dipartimento di Ingegneria dell’Informazione, Università di Brescia, Via Branze 38, 25123 Brescia, Italy
Abstract: Optical frequency combs currently represent enabling components in a wide number of fast-growing research fields, from frequency metrology to precision spectroscopy, from synchronization of telecommunication systems to environmental and biomedical spectrometry. As recently demonstrated, quadratic nonlinear media are a promising platform for optical frequency combs generation, through the onset of an internally pumped optical parametric oscillator in cavity enhanced second-harmonic generation systems. We present here a proposal for quadratic frequency comb generation in AlGaAs waveguide resonators. Based on the crystal symmetry properties of the AlGaAs material, quasi-phase matching can be realized in curved geometries (directional quasi-phase matching), thus ensuring efficient optical frequency conversion. We propose a novel design of AlGaAs waveguide resonators with strongly reduced total losses, compatible with long-path, high-quality resonators. By means of a numerical study, we predict efficient frequency comb generation with threshold powers in the microwatt range, paving the way for the full integration of frequency comb synthesizers in photonic circuits.
More Information: M.D.R. acknowledges support from Consiglio Nazionale delle Ricerche through the Short-Term Mobility Program 2016.KeyWords: Aluminum alloys; Aluminum gallium arsenide; Crystal symmetry; Gallium alloys; Nanoelectronics; Natural frequencies; Nonlinear optics; Optical materials; Optical parametric oscillators; Parametric oscillators; Phase matching; Photonics; Resonators; Spectroscopy; Waveguides, AlGaAs; Frequency metrology; Micro resonators; Optical frequency combs; Precision spectroscopy; Quadratic nonlinear media; Quasi phase matching; Symmetry properties; Optical frequency conversionDOI: 10.1117/12.2256290Connecting to view paper tab on IsiWeb: Click here