Dynamics of microring resonator modulators
Author(s) -
Wesley D. Sacher,
Joyce K. S. Poon
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.015741
Subject(s) - resonator , optics , laser linewidth , free spectral range , refractive index , modulation (music) , coupled mode theory , waveguide , bandwidth (computing) , coupling (piping) , materials science , coupling strength , physics , telecommunications , laser , computer science , acoustics , metallurgy , condensed matter physics
A dynamic model for the transmission of a microring modulator based on changes in the refractive index, loss, or waveguide-ring coupling strength is derived to investigate the limitations to the intensity modulation bandwidth. Modulation bandwidths approaching the free spectral range frequency are possible if the waveguide-ring coupling strength is varied, rather than the refractive index or loss of the ring. The results illustrate that via controlled coupling, resonant modulators with high quality factors can be designed to operate at frequencies much larger than the resonator linewidth.
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