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US 8,948,614 B1Granted
Pluggable photonics for coherent optical communication
AssigneeJuniper Networks, Inc.
InventorsTheodore John Schmidt, Christian Malouin, Roberto Marcoccia, Steven Keck, Bo Zhang
Life of this patent
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Abstract
This disclosure describes techniques to utilize pluggable photonics module in high data rates optical communications systems such as some coherent optical communications system. The pluggable photonics module plugs into a host board. The host board includes a processor that compensates for distortion caused by data streams traveling across the pluggable interfaces that the pluggable photonics module and host board use to couple to one another.
Claims26
A method comprising:
- receiving, from a pluggable photonics module via a pluggable interface, a plurality of electrical data streams that together represent magnitude and phase information for a received optical signal in a coherent optical communication system, the electrical data streams having electrical distortion caused by the pluggable interface of the pluggable photonics module;
- compensating for the electrical distortion on a first electrical data stream of a pair of the electrical data streams based on a second electrical data stream of the pair of the electrical data streams;
- compensating for the electrical distortion on the second electrical data stream of the pair of the electrical data streams based on the first electrical data stream of the pair of the electrical data streams;
- and
- recovering the magnitude and phase information of the received optical signal from the electrical distortion compensated first and second electrical data streams.
2 more elements
A processor comprising:
- input units configured to receive, from a pluggable photonics module via a pluggable interface, a plurality of electrical data streams that together represent magnitude and phase information for a received optical signal in a coherent optical communication system, the electrical data streams having electrical distortion caused by the pluggable interface of the pluggable photonics module;
- and
- a RX-equalizer configured to:
- compensate for the electrical distortion on a first electrical data stream of a pair of the electrical data streams based on a second electrical data stream of the pair of the electrical data streams;
- and
- compensate for the electrical distortion on the second electrical data stream of the pair of electrical data streams based on the first electrical data stream of the pair of the electrical data streams,
- wherein the processor is configured to recover the magnitude and phase information of the received optical signal from the electrical distortion compensated first ad second electrical data streams.
4 more elements
A host board comprising:
- a pluggable interface configured to selectively couple the host board to or decouple the host board from a pluggable photonics module and receive, from the pluggable photonics module, a plurality of electrical data streams that together represent magnitude and phase information for a received optical signal in a coherent optical communication system;
- and
- a processor configured to:
- compensate for electrical distortion on a first electrical data stream of a pair of the data streams based on a second electrical data stream of the pair of the data streams;
- compensate for electrical distortion of the second electrical data stream of the pair of the data streams based on the first electrical data stream of the pair of the data streams;
- and
- recover the magnitude and phase information of the received optical signal from the electrical distortion compensated first and second electrical data streams,
- wherein the electrical distortion is caused by at least the pluggable interface of the pluggable photonics module.
5 more elements
A method comprising:
- receiving, with a pluggable photonics module, an optical signal in a coherent optical communication system;
- receiving, with an interface on the pluggable photonics module, from a host board instructions to adjust at least one of a power of a local oscillator within the pluggable photonics module, a frequency of the local oscillator within the pluggable photonics module, and an amplitude of one of the electrical data streams output by a transimpedance amplifier (TIA) within the pluggable photonics module;
- converting, with the pluggable photonics module, the optical signal into a plurality of electrical data streams that together represent magnitude and phase information of the received optical signal based on the adjustment to the at least one of the power of a local oscillator within the pluggable photonics module, the frequency of the local oscillator within the pluggable photonics module, and the amplitude of one of the electrical data streams output by the TIA within the pluggable photonics module;
- and
- transmitting, with the pluggable photonics module, the plurality of the electrical data streams across a pluggable interface that allows selective coupling of the pluggable photonics module to and decoupling of the pluggable photonics module from a host board.
2 more elements
A pluggable photonics module comprising:
- a pluggable interface configured to allow selective coupling and decoupling of the pluggable photonics module and a host board;
- a local oscillator;
- a transimpedance amplifier (TIA);
- an interface configured to receive from the host board instructions to adjust at least one of a power of the local oscillator, a frequency of the local oscillator, and an amplitude of the TIA;
- and
- photonics configured to:
- receive an optical signal in a coherent optical communication system;
- convert the optical signal into a plurality of electrical data streams that together represent magnitude and phase information of the received optical signal based on the adjustment to the at least one of the power of the local oscillator, the frequency of the local oscillator, and the amplitude of the TIA;
- and
- transmit the plurality of the electrical data streams across the pluggable interface to the host board.
7 more elements
A network device comprising:
- a pluggable photonics module;
- and
- a host board,
- wherein the pluggable photonics module comprises:
- a first pluggable interface configured to allow selective coupling and decoupling of the pluggable photonics module and the host board;
- and
- photonics configured to:
- receive an optical signal in a coherent optical communication system;
- convert the optical signal into a plurality of electrical data streams that together represent magnitude and phase information of the received optical signal;
- and
- transmit the plurality of the electrical data streams across the pluggable interface to the host board, and
- wherein the host board comprises:
- a second pluggable interface configured to selectively couple the host board to or decouple the host board from the pluggable photonics module and receive the plurality of the electrical data streams;
- and
- a processor configured to:
- compensate for electrical distortion on a first electrical data stream of a pair of the data streams based on a second electrical data stream of the pair of the data streams;
- compensate for electrical distortion of the second electrical data stream of the pair of the data streams based on the first electrical data stream of the pair of the data streams;
- and
- recover the magnitude and phase information of the received optical signal from the electrical distortion compensated first and second electrical data streams,
- wherein the electrical distortion is caused by at least the first and second pluggable interfaces.
17 more elements
Dependencies are inferred from the claim text.