Optical receiver with an optically compensated amplifier control loop
AssigneeJuniper Networks, Inc.
InventorsRobert S. Guzzon, John Garcia, Theodore J. Schmidt
Life of this patent
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Abstract
An optical receiver can implement a transimpedance amplifier (TIA) to process received light using a closed loop optical pre-amplification. The optical receiver can use an average input value of the TIA to control an semiconductor optical amplifier (SOA) or pre-amplification as received average signal varies. The optical receiver can include a gain controller for the TIA that can measure the TIA swing to adjust the gain of the SOA to pre-amplify received light in a closed loop control configuration.
Claims20
An optical receiver comprising:
- a photonic integrated circuit comprising an optical amplifier to optically amplify light based on an optical gain of the optical amplifier, the photonic integrated circuit further comprising a photodetector to generate an electrical signal from the optically amplified light;
- an electronic circuit structure to process the electrical signal generated by the photodetector, the electronic circuit structure comprising an electrical amplifier that generates an amplified electrical signal from the electrical signal generated by the photodetector, an electrical gain of the electrical amplifier being adjusted based on variations in the amplified electrical signal generated by the electrical amplifier;
- and a hardware processor to adjust the optical gain of the optical amplifier based on the electrical gain changing due to variations in the light received by the optical receiver.
A method for processing light using an optical receiver, the method comprising:
- receiving light by a photonic integrated circuit structure of the optical receiver, the photonic integrated circuit structure including an optical amplifier that is coupled to a photodetector;
- generating amplified light by optically amplifying the light using the optical amplifier in the photonic integrated circuit structure, the amplified light being amplified based on an optical gain of the optical amplifier;
- generating an electrical signal by detecting the amplified light using the photodetector in the photonic integrated circuit structure;
- generating, from the electrical signal, an amplified electrical signal using an electrical amplifier in an electronic circuit structure of the optical receiver, an electrical gain of the electrical amplifier being adjusted based on variations in the amplified electrical signal;
- and continually adjusting the optical gain of the optical amplifier based on the electrical gain changing due to variations in the light received by the optical receiver.
Dependencies are inferred from the claim text.