title: A polarization-diversity wavelength duplexer circuit in silicon-on-insulator photonic wires.
abstract: We present a wavelength duplexer based on a compact arrayed waveguide grating (AWG) in silicon-on-insulator photonic wire waveguides. Polarization insensitive operation is achieved through a special polarization diversity approach in which we use 2-D grating fiber couplers as integrated polarization splitters. To mitigate the effects of process variations, we propagated both polarizations in opposite directions through the same AWG with a mere 600x350microm(2) footprint. This resulted in an on-chip insertion loss between -2.1dB and -6.9dB, crosstalk of -15dB, and only 0.66dB polarization dependent loss. This is the first demonstration of a functional polarization-diversity circuit implemented in SOI nanophotonic waveguides, including interfaces to single-mode fiber.
authors.forename: Wim
authors.initials: W
authors.lastname: Bogaerts
authors.forename: Dirk
authors.initials: D
authors.lastname: Taillaert
authors.forename: Pieter
authors.initials: P
authors.lastname: Dumon
authors.forename: Dries
authors.initials: D
authors.lastname: Van Thourhout
authors.forename: Roel
authors.initials: R
authors.lastname: Baets
authors.forename: Elroy
authors.initials: E
authors.lastname: Pluk