Patent ID: 8285149

Claim:
An integrated DWDM transmitter apparatus, the apparatus comprising: a support component, the support component including a temperature adjustment component; a silica-on-silicon substrate overlying the support component, the silica-on-silicon substrate including a silica layer and a silicon layer, the silica-on-silicon substrate corresponding to a substrate surface, the substrate surface including a first surface region and a second surface region, the first surface region and the second surface region not being coplanar; an optical multiplexer within the silica layer, the optical multiplexer including a plurality of input waveguides and at least an output waveguide; and one or more semiconductor InP laser array chips mounted on the first surface region of the silica-on-silicon substrate, each of the one or more laser array chips including two or more lasers, each of the two or more lasers being optically coupled to a corresponding one of the plurality of input waveguides; wherein the optical multiplexer overlies the silicon layer and is located under the second surface region.