Frequency comb generation in a continuously pumped optical parametric oscillator

Year: 2018

Authors: Mosca S., Parisi M., Ricciardi I., Leo F., Hansson T., Erkintalo M., Maddaloni P., De Natale P., Wabnitz S., De Rosa M.

Autors Affiliation: CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; OPERA-photonics, Université libre de Bruxelles, 50 Avenue F. D. Roosevelt, CP 194/5, B-1050 Bruxelles, Belgium; Dipartimento di Ingegneria dell’Informazione, Università di Brescia, via Branze 38, 25123 Brescia, Italy; 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, Largo E. Fermi 6, 50125 Firenze, Italy; Dipartimento di Ingegneria dell’Informazione, Università di Brescia, and CNR-INO, Istituto Nazionale di Ottica, via Branze 38, 25123 Brescia, Italy

Abstract: We demonstrate optical frequency comb generation in a continuously pumped optical parametric oscillator, in the parametric region around half of the pump frequency. We also model the dynamics of such quadratic combs using a single time-domain mean-field equation, and obtain simulation results that are in good agreement with experimentally observed spectra. Moreover, we numerically investigate the coherence properties of simulated combs, showing the existence of correlated and phase-locked combs. Our work could pave the way for a new class of frequency comb sources, which may enable straightforward access to new spectral regions and stimulate novel applications of frequency combs.

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More Information: The authors acknowledge financial support by: Ministero dell’Istruzione, dell’Università e della Ricerca (Projects PRIN-2015KEZNYM, “NEMO–Nonlinear dynamics of optical frequency combs”, and FIRB n. RBFR13QUVI “Optomechanical tailoring of squeezed light”); Ministero degli Affari Esteri e della Cooperazione Internazionale (Project “NOICE Joint Laboratory”); Rutherford Discovery Fellowships and Marsden fund of the Royal Society of New Zealand; European Union’s Horizon 2020 Marie Sklodowska-Curie grant agreement No. GA-2015-713694. – The Society of Photo-Optical Instrumentation Engineers (SPIE)
KeyWords: Microwave oscillators; Natural frequencies; Niobium compounds; Nonlinear optics; Optical materials; Optical parametric oscillators, Coherence properties; Frequency combs; Lithium niobate; Mean field equation; Novel applications; Optical frequency comb generation; Optical frequency combs; Spectral region, Optical frequency conversion

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