Patent ID: 7480425

Claim:
An opto-electronic device, comprising: a substrate; an optical modulator formed on the substrate and operable to modulate light in response to an electrical modulation signal to produce modulated light; a first waveguide formed on the substrate to guide the modulated light from the optical modulator; a first optical coupler formed on the substrate and coupled to the first waveguide to couple the modulated light as an output beam off the substrate; a second optical coupler formed on the substrate to receive input light to the substrate; an optical reflector formed on the substrate to receive light from the second optical coupler to transmit a second portion of the received light and to reflect a first portion of the received light back to the second optical coupler which directs the first portion out of the substrate; a photodetector on the substrate to receive and convert the second portion of light from the optical reflector into an electrical signal; an electrical circuit on the substrate and electrically coupled between the photodetector and the optical modulator to produce the electrical modulation signal from the electrical signal; a third optical coupler formed on the substrate to receive a beam of CW light from a source off the substrate; and a second waveguide formed on the substrate to guide the beam of CW light from the third optical coupler to the optical modulator a the light to be modulated.