Patent ID: 8050525

Claim:
An integrated DWDM transmitter apparatus, the apparatus comprising: a silica-on-silicon substrate, the silica-on-silicon substrate including a silica layer and a silicon layer, the silica-on-silicon substrate having a recessed region; a plurality of input waveguides within the silica layer; a plurality of gratings within the silica layer, each of the plurality of gratings coupled to a corresponding one of the input waveguides; an arrayed waveguide grating within the silica layer and coupled to the plurality of input waveguides; at least an output waveguide within the silica layer and coupled to the arrayed waveguide grating; a plurality of lasers mounted on a surface of the recessed region of the silica-on-silicon substrate, each of the plurality of lasers being optically coupled to a corresponding one of the plurality of input waveguides; and a plurality of photodiodes, each of the plurality of photodiode overlying a corresponding one of the plurality of gratings.