Abstract

A compact $1\times 4$ wavelength demultiplexer is proposed based on the directional coupling of periodic dielectric waveguides for optical communication wavelengths. With appropriate optimization, the $1\times 4$ wavelength demultiplexer can route 1130, 1310, 1490, and 1700 nm wavelengths to corresponding out ports with a transmittance of more than 95%. This provides a simple and compact demultiplexer that is expected to be applied to highly dense photonic integrated circuits.

©2012 Optical Society of America

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