An eight-channel add-drop filter using vertically coupled microring resonators over a cross grid

An eight-channel add-drop cross-grid vertically coupled microring resonator (VCMRR) filter is proposed and demonstrated. The cross grid comprises a grid-like array of buried channel waveguides which perpendicularly cross through each other, VCMRRs at each of the cross-grid nodes serve as the wavelen...

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Bibliographic Details
Published in:IEEE photonics technology letters 1999-06, Vol.11 (6), p.691-693
Main Authors: Chu, S.T., Little, B.E., Pan, W., Kaneko, T., Sato, S., Kokubun, Y.
Format: Article
Language:English
Subjects:
Arrays
Channels
Crosstalk
Noise levels
Optical filters
Optical resonators
Optical ring resonators
Optical scattering
Optical waveguides
Photonics
Propagation losses
Resonator filters
Resonators
Waveguides
Wavelength division multiplexing
Wavelength measurement
Wavelengths
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Summary:An eight-channel add-drop cross-grid vertically coupled microring resonator (VCMRR) filter is proposed and demonstrated. The cross grid comprises a grid-like array of buried channel waveguides which perpendicularly cross through each other, VCMRRs at each of the cross-grid nodes serve as the wavelength selective add-drop filters. Measured crosstalk levels at the crossings are typically less than -30 dB. Rings with a nominal radius of 10 μm are used to achieve a free-spectral range of 20 nm and optical bandwidths of 1 nm, while changes of the radii in increments of 50 nm lead to a nominal channel spacing of 5.7 nm.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.766787