Silicon-on-insulator (SOI) technology offers tremendous potential for
the integration of optoelectronic functions on a silicon substrate. Th
e authors have demonstrated integrated 3 dB optical directional couple
rs, a 5 x 9 star coupler, and a Mach-Zehnder wavelength demultiplexer
using SOI rib waveguides. These devices show excellent performance cha
racteristics and represent key components for the realisation of monol
ithic optoelectronic circuits in a silicon IC-compatible technology.