title: Optical add-drop multiplexers based on the antisymmetric waveguide Bragg grating.
abstract: A novel optical add-drop multiplexer (OADM) based on a null coupler with an antisymmetric grating was designed and experimentally demonstrated. The antisymmetric grating exclusively produces a reflection with mode conversion in a two-mode waveguide. This improves the performance compared with previous demonstrations that used tilted Bragg gratings. Our design minimizes noise and cross talk produced by reflection without mode conversion. In addition, operational bandwidth and, versatility are improved while the compactness and simplicity of the null coupler OADM are maintained.
authors.affiliation: University of Arizona, Department of Electrical and Computer Engineering, 1230 East Speedway Avenue, Tucson, Arizona 85721-0104, USA. jmcastro@e-mail.arizona.edu
authors.forename: Jose M
authors.initials: JM
authors.lastname: Castro
authors.forename: David F
authors.initials: DF
authors.lastname: Geraghty
authors.forename: Seppo
authors.initials: S
authors.lastname: Honkanen
authors.forename: Christoph M
authors.initials: CM
authors.lastname: Greiner
authors.forename: Dmitri
authors.initials: D
authors.lastname: Iazikov
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Mossberg