Abstract

A novel design for an ultracompact, high-Q notch-rejection filter is presented, and an analytic expression for the transmission properties is derived. This folded directional coupler shares the properties of a Fabry–Perot resonator and a directional coupler. We compare and contrast the device to high-Q Fabry–Perot cavities in photonic crystal waveguides.

© 2003 Optical Society of America

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