Experimental demonstration of waveguide-coupled round-cornered octagonal microresonators in silicon nitride
Optics Letters, Vol. 30, Issue 5, pp. 546-548 (2005)
http://dx.doi.org/10.1364/OL.30.000546
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Abstract
We report laterally waveguide-coupled octagonal microresonators with designed round resonator corners in silicon nitride. We demonstrate nearly single-mode add-drop filter characteristics, when 50-µm-size round-cornered octagonal microresonators are used, with an optimum coupling efficiency exceeding 96%, a finesse of ∼30, and a Q of ∼6400. Our experiments also reveal two unforeseen phenomena in certain microresonator shapes: a pronounced drop in coupling efficiency and resonance notches in the drop spectrum. These device characteristics hint at the recently postulated multiple orbit interference in waveguide-coupled polygonal microresonators.
© 2005 Optical Society of America
OCIS Codes
(230.5750) Optical devices : Resonators
(230.7390) Optical devices : Waveguides, planar
Citation
Chao Li and Andrew W. Poon, "Experimental demonstration of waveguide-coupled round-cornered octagonal
microresonators in silicon nitride," Opt. Lett. 30, 546-548 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-5-546
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