Abstract
The aim of this work is to enhance the 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 value of the resulting ring resonator is measured, and we demonstrate, as an example, an eightfold enhancement of the value at a wavelength of 1340 nm. Finally, we also estimate the 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 value by up to 5.2 times at a wavelength of 1340 nm.
©2012 Optical Society of America
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