In this Letter we theoretically investigate the formation of localized temporal dissipative structures, and their corresponding frequency combs in doubly resonant dispersive optical parametric oscillators. We derive a nonlocal mean field model, and show that domain wall locking allows for the formation of stable coherent optical frequency combs. (C) 2019 Optical Society of America
Funding Agencies|Ministero dellIstruzione, dellUniversita e della Ricerca (MIUR) [2015KEZNYM]; Vetenskapsradet (VR) [2017-05309]; H2020 European Research Council (ERC) [757800]; KU Leuven; Fonds De La Recherche Scientifique-FNRS (FNRS)