title: Generation of two-cycle pulses and octave-spanning frequency combs in a dispersion-flattened micro-resonator.
abstract: We show that octave-spanning Kerr frequency combs with improved spectral flatness of comb lines can be generated in dispersion-flattened microring resonators. The resonator is formed by a strip/slot hybrid waveguide, exhibiting a flat and low anomalous dispersion between two zero-dispersion wavelengths that are separated by one octave from near-infrared to mid-infrared. Such flattened dispersion profiles allow for the generation of mode-locked frequency combs, using relatively low pump power to obtain two-cycle cavity solitons on a chip, associated with the octave-spanning comb bandwidth. The wavelength dependence of the optical loss and of the coupling coefficient and thus wavelength dependent Q-factor are also considered.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.forename: Chengying
authors.initials: C
authors.lastname: Bao
authors.forename: Vivek
authors.initials: V
authors.lastname: Singh
authors.forename: Jianwei
authors.initials: J
authors.lastname: Mu
authors.forename: Changxi
authors.initials: C
authors.lastname: Yang
authors.forename: Anuradha M
authors.initials: AM
authors.lastname: Agarwal
authors.forename: Lionel C
authors.initials: LC
authors.lastname: Kimerling
authors.forename: Jurgen
authors.initials: J
authors.lastname: Michel