title: Silicon-on-insulator eight-channel optical multiplexer based on a cascade of asymmetric Mach-Zehnder interferometers.
abstract: A monolithically integrated eight-channel optical multiplexer (Mux) with a 400 GHz channel spacing ~1550 nm is presented based on a silicon-on-insulator rib waveguide and an asymmetric Mach-Zehnder interferometer. All channels were optimized independently with integrated heaters. The fully tuned Mux shows an adjacent channel isolation of ~13 dB, an excess loss of ~2.6 dB, and a channel uniformity of ~1.5 dB over a 25 nm wavelength span. In addition, the phase tuning efficiency for different interlevel dielectric layer thicknesses and thermal crosstalk were investigated.
authors.affiliation: Intel Corporation, Santa Clara, CA 95054, USA.
authors.forename: Dae Woong
authors.initials: DW
authors.lastname: Kim
authors.forename: Assia
authors.initials: A
authors.lastname: Barkai
authors.forename: Richard
authors.initials: R
authors.lastname: Jones
authors.forename: Nomi
authors.initials: N
authors.lastname: Elek
authors.forename: Hat
authors.initials: H
authors.lastname: Nguyen
authors.forename: Ansheng
authors.initials: A
authors.lastname: Liu