The invention is an optoelectronic device and method of fabrication where at
least two optical devices are formed on a single semiconductor substrate, with
each optical device including an active region such as a multi-quantum well region.
The active devices are spatially separated and optically coupled by a passive waveguide
formed over the substrate which provides butt joints with the active regions. The
butt joints can be optimized independently from the active regions thus improving yield.
