Single envelope equation modeling of multi-octave comb arrays in microresonators with quadratic and cubic nonlinearities

Year: 2016

Authors: Hansson T., Leo F., Erkintalo M., Anthony J., Coen S., Ricciardi I., De Rosa M., Wabnitz S.

Autors Affiliation: Dipartimento di Ingegneria dell’Informazione, Università di Brescia, via Branze 38, 25123 Brescia, Italy
Department of Applied Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden;
The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Physics, The University of Auckland,
Auckland 1142, New Zealand;
CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy

Abstract: We numerically study, by means of the single envelope equation, the generation of optical frequency combs ranging from the visible to the mid-infrared spectral regions in resonators with quadratic and cubic nonlinearities. Phase-matched quadratic wave-mixing processes among the comb lines can be activated by low-power continuous wave pumping in the near infrared of a radially poled lithium niobate whispering gallery resonator. We examine both separate and coexisting intracavity doubly resonant second-harmonic generation and parametric oscillation processes and find that modulation instabilities may lead to the formation of coupled comb arrays extending over multiple octaves. In the temporal domain, the frequency combs may correspond to pulse trains or even to a single pulse circulating in the cavity. (C) 2016 Optical Society of America


Volume: 33 (6)      Pages from: 1207  to: 12015

More Information: Italian Ministry of University and Research (2012BFNWZ2); Swedish Research Council (2013-7508); Royal Society of New Zealand; Finnish Cultural Foundation.
KeyWords: Control nonlinearities; Infrared devices; Nonlinear optics; Phase matching; Resonators, Continuous-wave pumping; Cubic nonlinearities; Envelope equations; Mid-infrared spectral regions; Modulation instabilities; Optical frequency combs; Parametric oscillations; Whispering gallery resonators, Harmonic generation
DOI: 10.1364/JOSAB.33.001207

Citations: 33
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