Optical frequency combs in dispersion-controlled doubly resonant second-harmonic generation

Year: 2022

Authors: Ricciardi I.; Maddaloni P.; Natale P.D.E.; Erkintalo M.; Hansson T.; Arie A.; Wabnitz S.; de Rosa M.

Autors Affiliation: Ist Nazl Ottica, CNR INO, Via Campi Flegrei 34, I-80078 Pozzuoli, Italy; Complesso Univ MS Angelo, Ist Nazl Fis Nucleare, Sez Napoli, INFN, Via Cintia, I-80126 Naples, Italy; Ist Nazl Ottica, CNR INO, largo E Fermi 6, I-50125 Florence, Italy; Univ Auckland, Dodd Walls Ctr Photon & Quantum Technol, Dept Phys, Auckland 1142, New Zealand; Linkoping Univ, Dept Phys Chem & Biol, S-58183 Linkoping, Sweden; Tel Aviv Univ, Iby & Aladar Fleischman Fac Engn, Sch Elect Engn, IL-69978 Tel aviv, Israel; Sapienza Univ Roma, Dipartimento Ingn Informaz, Elettron & Telecomunicazioni, Via Eudossiana 18, I-00184 Rome, Italy.

Abstract: We report on the experimental realization and a systematic study of optical frequency comb generation in doubly resonant intracavity second harmonic generation (SHG). The efficiency of intracavity nonlinear processes usually benefits from the increasing number of resonating fields. Yet, achieving the simultaneous resonance of different fields may be technically complicated, all the more when a phase matching condition must be fulfilled as well. In our cavity we can separately control the resonance condition for the fundamental and its second harmonic, by simultaneously acting on an intracavity dispersive element and on a piezo-mounted cavity mirror, without affecting the quasi-phase matching condition. In addition, by finely adjusting the laser-to-cavity detuning, we are able to observe steady comb emission across the whole resonance profile, revealing the multiplicity of comb structures, and the substantial role of thermal effects on their dynamics. Lastly, we report the results of numerical simulations of comb dynamics, which include photothermal effects, finding a good agreement with the experimental observations. Our system provides a framework for exploring the richness of comb dynamics in doubly resonant SHG systems, assisting the design of chip-scale quadratic comb generators.

Journal/Review: OPTICS EXPRESS

Volume: 30 (25)      Pages from: 45694  to: 45704

KeyWords: LITHIUM-NIOBATE; PARAMETRIC OSCILLATION; MODE; SOLITON
DOI: 10.1364/OE.472424

ImpactFactor: 3.800
Citations: 4
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24
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