Open AccessMany-element coupled-resonator optical waveguides using gapless-coupled microdisk resonators
Author(s) -
Xianshu Luo,
Andrew Poon
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.023617
Subject(s) - resonator , optics , laser linewidth , materials science , coupling (piping) , q factor , transmission (telecommunications) , photonics , optoelectronics , coupling coefficient of resonators , physics , telecommunications , laser , computer science , metallurgy
We report silicon photonic many-element coupled-resonator optical waveguides (CROWs) using microspiral and double-notch-shaped microdisk resonators. Such microresonators enable gapless inter-cavity coupling via seamlessly jointed sub-micrometer-sized notches. Our experiments reveal CROW transmission spectra using up to 101 gaplessly coupled microdisk resonators. We estimate from the transmission measurements an insertion loss of approximately 0.11-approximately 0.24 dB/disk within the transmission bands. We show high-order filtering performance with maximum 3-dB linewidth of approximately 2.5 nm and measurement-limited side-mode suppression ratio of approximately 30 dB. The demonstrated maximum optical delay from a 101-element 0.4-microm-notch CROW is approximately 70 ps at the transmission band center and approximately 110 ps at the sideband.