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Enhancement of the Q value of a microring resonator by introducing curved photonic crystal waveguides
伊藤, 雅英
Sugisaka, Jun-ichiro
Yamamoto, Noritsugu
Okano, Makoto
Komori, Kazuhiro
Itoh, Masahide
The aim of this work is to enhance the Q value of a photonic crystal microring resonator that can be used to buffer optical signals (in a pulse train). A conventional photonic crystal microring resonator having 60° bends exhibits poor confinement of light due to the radiation losses at the bending points. Hence, we replaced conventional bent waveguides with circularly curved ones. The Q value of the resulting ring resonator is measured, and we demonstrate, as an example, an eightfold enhancement of the Q value at a wavelength of 1340 nm. Finally, we also estimate the Q value of a ring waveguide that excludes the optical coupling between the input/output waveguides, showing that the replacement of a sharply bent waveguide by a curved one increases the Q value by up to 5.2 times at a wavelength of 1340 nm.
journal article
Optical Society of America
2012-07
application/pdf
Journal of the Optical Society of America. B
7
29
1599
1605
http://hdl.handle.net/2241/117533
0740-3224
AA10643523
https://tsukuba.repo.nii.ac.jp/record/27618/files/JOSAB-29-7-1599.pdf
eng
10.1364/JOSAB.29.001599
© 2012 Optical Society of America.
This paper was published in Journal of the Optical Society of America. B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josab/abstract.cfm?uri=josab-29-7-1599. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.