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Coupled-ring-resonator-based silicon modulator for enhanced performance

2008; Optica Publishing Group; Volume: 16; Issue: 17 Linguagem: Inglês

10.1364/oe.16.013342

1094-4087

Yunchu Li, Lin Zhang, Muping Song, Bo Zhang, Jeng-Yuan Yang, Raymond G. Beausoleil, Alan E. Willner, P.D. Dapkus,

Advanced Photonic Communication Systems

A compact silicon coupled-ring modulator structure is proposed. Two rings are coupled to each other, and only one of these rings is actively driven and over-coupled to a waveguide, which enables high modulation speed. The resultant notch filter profile is steeper than that of the single ring and has exhibited a smaller resonance shift and lower driving electrical power. Simulation results include: (i) potentially 60-Gb/s non-return-to-zero (NRZ) data modulation and over 20-dB extinction ratio can be achieved by shifting the active ring by a 20 GHz resonance shift, (ii) the frequency chirp of the modulated signals can be adjusted by varying the coupling coefficient between the two rings, and (iii) dispersion tolerance at 0.5-dB power penalty is extended from 18 to 85 ps/nm, for a 40-Gb/s NRZ signal.