title: Adiabatic mode multiplexer for evanescent-coupling-insensitive optical switching.
abstract: A novel adiabatic mode multiplexer enables a 2 x 2 optical switch whose operation does not depend on accumulated phase due to evanescent coupling between waveguides. The adiabatic mode multiplexer has a negligible insertion loss over C+L bands and modal cross talk better than -40 dB for any polarization state. Mode multiplexing is achieved by adiabatic transition from the fundamental mode of the single-mode waveguide to the higher mode of the multimode waveguide. Experimental measurement results for a device realized in silica-on-silicon technology are presented. By directly measuring the nonadiabatic transition probability, we show that the adiabatic mode multiplexer operates in the Landau-Zener regime.
authors.affiliation: OpTun Inc., 3350 Scott Boulevard, Santa Clara, California 95054, USA. enarevicius@yahoo.com
authors.forename: E
authors.initials: E
authors.lastname: Narevicius
authors.forename: R
authors.initials: R
authors.lastname: Narevich
authors.forename: Y
authors.initials: Y
authors.lastname: Berlatzky
authors.forename: I
authors.initials: I
authors.lastname: Shtrichman
authors.forename: G
authors.initials: G
authors.lastname: Rosenblum
authors.forename: I
authors.initials: I
authors.lastname: Vorobeichik