title: Coherence and incoherence in an optical comb.
abstract: We demonstrate a coexistence of coherent and incoherent modes in the optical comb generated by a passively mode-locked quantum dot laser. This is experimentally achieved by means of optical linewidth, radio frequency spectrum, and optical spectrum measurements and confirmed numerically by a delay-differential equation model showing excellent agreement with the experiment. We interpret the state as a chimera state.
authors.affiliation: National Research University of Information Technologies, Mechanics and Optics, 199034 St. Petersburg, Russia and Optique Nonlinéaire Théorique, Université Libre de Bruxelles, Campus Plaine, Code Postal 231, B-1050 Bruxelles, Belgium.
authors.forename: Evgeny A
authors.initials: EA
authors.lastname: Viktorov
authors.affiliation: Centre for Advanced Photonics and Process Analysis, and Department of Applied Physics and Instrumentation, Cork Institute of Technology, Cork, Ireland and Tyndall National Institute, University College Cork, Lee Maltings, Dyke Parade, Cork, Ireland and Aston University, Aston Triangle, B4 7ET Birmingham, United Kingdom.
authors.forename: Tatiana
authors.initials: T
authors.lastname: Habruseva
authors.affiliation: Tyndall National Institute, University College Cork, Lee Maltings, Dyke Parade, Cork, Ireland.
authors.forename: Stephen P
authors.initials: SP
authors.lastname: Hegarty
authors.affiliation: National Research University of Information Technologies, Mechanics and Optics, 199034 St. Petersburg, Russia and Centre for Advanced Photonics and Process Analysis, and Department of Applied Physics and Instrumentation, Cork Institute of Technology, Cork, Ireland and Tyndall National Institute, University College Cork, Lee Maltings, Dyke Parade, Cork, Ireland.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Huyet
authors.affiliation: Centre for Advanced Photonics and Process Analysis, and Department of Applied Physics and Instrumentation, Cork Institute of Technology, Cork, Ireland and Tyndall National Institute, University College Cork, Lee Maltings, Dyke Parade, Cork, Ireland.
authors.forename: Bryan
authors.initials: B
authors.lastname: Kelleher