title: Cascaded uncoupled dual-ring modulator.
abstract: We demonstrate, by coherent driving two uncoupled rings in same direction, that the effective photon circulating time in the dual-ring modulator is reduced, with increased modulation quality. The inter-ring detuning-dependent photon dynamics, Q factor, extinction ratio, and optical modulation amplitude of two cascaded silicon ring resonators are studied and compared with that of a single-ring modulator. Experimentally measured eye diagrams, together with coupled mode theory simulations, demonstrate the enhancement of the dual-ring configuration at 20 Gbps with a Q∼20,000.
authors.forename: Tingyi
authors.initials: T
authors.lastname: Gu
authors.forename: Young-Kai
authors.initials: YK
authors.lastname: Chen
authors.forename: Chee Wei
authors.initials: CW
authors.lastname: Wong
authors.forename: Po
authors.initials: P
authors.lastname: Dong