Integrated opto-electronic oscillators
First Claim
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1. 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 third 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.
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Abstract
Integrated opto-electronic oscillators that use micro resonators in the optical section of the opto-electronic feedback loop.
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Citations
33 Claims
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1. An opto-electronic device, comprising:
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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 third 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An opto-electronic device, comprising:
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a substrate;
an optical modulator formed on the substrate and operable to modulate input light in response to an electrical modulation signal to produce modulated light;
a first waveguide formed on the substrate to guide the input light into the optical modulator for modulation;
a second 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 second 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 splitter formed on the substrate to receive light from the second optical coupler to split the received light into a first beam and a second beam, the first waveguide coupled to the optical splitter to receive the first beam as the input light to the optical modulator;
a photodetector on the substrate to receive and convert the second beam from the optical splitter into an electrical signal; and
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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An opto-electronic device, comprising:
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a first substrate processed to comprise an optical ring cavity to circulate light, a first waveguide optically coupled to the optical ring cavity to direct light into the optical ring cavity and a second waveguide optically coupled to the optical ring cavity to couple light out of the optical ring cavity;
a second, separate substrate engaged to the first substrate to export the light to the first waveguide on the first substrate and to receive light from the second waveguide on the first substrate, the second substrate processed to comprise an optical modulator operable to modulate input light in response to an electrical modulation signal to produce modulated light, a modulator input waveguide to guide the input light into the optical modulator for modulation, a modulator output waveguide to guide the modulated light from the optical modulator, an output port coupled between the modulator output waveguide and the first waveguide on the first substrate to direct the modulated light as the light to the first substrate, an input port coupled to the second waveguide on the first substrate to receive light, an optical splitter to receive light from the optical splitter to split the received light into a first beam to the modulator input waveguide and a second beam, a photodetector to receive and convert the second beam from the optical splitter into an electrical signal, and an electrical circuit electrically coupled between the photodetector and the optical modulator to produce the electrical modulation signal from the electrical signal. - View Dependent Claims (25, 26, 27)
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28. An opto-electronic device, comprising:
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a substrate;
an optical ring cavity formed on the substrate to circulate light;
an optical resonator on the substrate and optically coupled to the optical ring cavity via evanescent coupling;
an optical modulation mechanism in the optical ring cavity to modulate light in the optical ring cavity in response to a modulation control signal;
a photodetector on the substrate to receive a portion of the light in the optical ring cavity; and
a feedback circuit to receive a detector output from the photodetector and to produce the modulation control signal from the detector output. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification