Abstract
We experimentally demonstrate a new type of add–drop filter incorporating an asymmetric Y-branch waveguide coupler and a shifted-grating mode-conversion cavity. The device relies on mode separation in the asymmetric Y-branch and wavelength-selective mode conversion upon reflection from the shifted-grating cavity. Add–drop functionality is demonstrated in a three-port integrated silicon-on-insulator device.
© 2011 Optical Society of America
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