High capacity coherent optical transceiver for short reach applications
AssigneeCiena Corporation
InventorsMichael Y. FRANKEL, Vladimir PELEKHATY
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Abstract
An optical transceiver includes a transmitter including transmitter signal processing circuitry configured to receive a transmit signal and provide two drive voltage signals V1, V2 to a modulator configured to modulate a laser based thereon; and a receiver including i) optical couplers configured to coherently combine received signals with a Local Oscillator (LO) formed by the laser and provide the combined signals to photodetectors for balanced detection, and ii) receiver signal processing circuitry configured to demodulate outputs from the balanced detection, wherein the receiver signal processing circuitry comprises an analog front-end and digital back-end.
Claims20
An optical transceiver, comprising:
- a transmitter comprising transmitter signal processing circuitry configured to receive a transmit signal and provide two drive voltage signals V1, V2 to a modulator configured to modulate a laser based thereon;
- and
- a receiver comprising i) optical couplers configured to coherently combine received signals with a Local Oscillator (LO) formed by the laser and provide the combined signals to photodetectors for balanced detection, and ii) receiver signal processing circuitry configured to demodulate outputs from the balanced detection, wherein the receiver signal processing circuitry comprises an analog front-end and digital back-end.
A method for an optical transceiver, comprising:
- providing a transmitter comprising transmitter signal processing circuitry configured to receive a transmit signal and provide two drive voltage signals V1, V2 to a modulator configured to modulate a laser based thereon;
- and
- providing a receiver comprising i) optical couplers configured to coherently combine received signals with a Local Oscillator (LO) formed by the laser and provide the combined signals to photodetectors for balanced detection, and ii) receiver signal processing circuitry configured to demodulate outputs from the balanced detection, wherein the receiver signal processing circuitry comprises an analog front-end and digital back-end.
An optical transceiver for low power applications, comprising:
- a transmitter comprising transmitter signal processing circuitry configured to receive a transmit signal and provide two drive voltage signals V1, V2 to a Dual-Drive Mach-Zehnder Modulator (DD-MZM) modulator configured to modulate a laser based thereon;
- and
- a receiver comprising i) optical couplers configured to coherently combine received signals with a Local Oscillator (LO) formed by the laser and provide the combined signals to photodetectors for balanced detection, and ii) receiver signal processing circuitry configured to demodulate outputs from the balanced detection, wherein the receiver signal processing circuitry comprises an analog front-end and digital back-end, and wherein the receiver signal processing circuitry and the transmitter signal processing circuitry perform compensation of chromatic dispersion and distortion due to the DD-MZM in conjunction with an adjacent optical transceiver's receiver signal processing circuitry and transmitter signal processing circuitry.
Dependencies are inferred from the claim text.