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Traveling wave-like Fabry–Perot resonator-based add-drop filters

Qingzhong Huang, Qiang Liu, and Jinsong Xia

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Abstract

We have proposed and studied a novel channel add-drop filter (ADF) based on a single Fabry–Perot resonator. The resonator consists of two mode-conversion Bragg grating reflectors separated by a wide waveguide that laterally coupled to two narrow waveguides. It behaves like a traveling-wave resonator where fields are coupled to the buses in one direction. Compact and narrowband ADFs are achieved with dropping efficiencies higher than 95%, as shown by the three-dimensional finite-difference time-domain simulations. In addition, the proposed device is applied to realize an eight-channel add-drop multiplexer in the C-band by cascading the ADFs with adjusted channel wavelengths.

© 2017 Optical Society of America

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