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
Original Manuscript: April 4, 2011
Revised Manuscript: May 10, 2011
Manuscript Accepted: May 16, 2011
Published: June 7, 2011
Marcel W. Pruessner, Jacob B. Khurgin, Todd H. Stievater, William S. Rabinovich, Robert Bass, J. Brad Boos, and Vincent J. Urick, "Demonstration of a mode-conversion cavity add–drop filter," Opt. Lett. 36, 2230-2232 (2011)