Patent ID: 7477807

Claim:
A semiconductor chip comprising: a substrate; a plurality of DFB lasers provided on the substrate, each of the plurality of DFB lasers providing a corresponding one of a plurality of optical outputs at a respective one of a plurality of wavelengths; an arrayed waveguide grating (AWG) provided on the substrate, the AWG having a plurality of inputs and an output, the output of the AWG supplying a WDM signal; a plurality of electro-absorption (EA) modulators provided on the substrate; a plurality of semiconductor optical amplifiers (SOAs) provided on the substrate; and a plurality of optical paths, each of which being coupled between a corresponding one of the plurality of DFB lasers and a corresponding one of the plurality of inputs of the AWG, each of the plurality of optical paths receiving a respective one of the plurality of optical outputs, each of the plurality of optical paths including a corresponding one of the plurality of EA modulators and a corresponding of the plurality of SOAs.