Abstract
A novel one dimensional periodic dielectric ring waveguide (PDRWG) is
proposed and its dispersion properties are studied in details. Based on the proposed
waveguide structure, a compact dual wavelength demultiplexer is designed. By a
finite-difference time-domain (FDTD) simulation method, the performance of the
designed device is calculated and analyzed. The dual wavelength demultiplexer can
split the communication wavelengths of 1.31 and 1.55 mm into different waveguides
and output from different ports with relative high transmittances of about 98% and
92%, respectively. The PDRWG may find applications in multi-wavelength
demultiplexers or other novel integrated photonic devices.
© 2014 Chinese Optics Letters
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