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US 9,960,856 B2Granted
System and method for optical receiver
AssigneeHuawei Technologies Co., Ltd.
InventorsZhaohui Li, Xuebing Zhang, Huixiao Ma
Life of this patent
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Abstract
A receiver is provided, including a signal acquiring unit, a signal diversity unit that is connected to the signal acquiring unit, a signal combination unit that is connected to the signal diversity unit, and a digital-signal acquiring unit that is connected to the signal combination unit. The receiver can receive a dual-polarization signal and can eliminate SSBI from the dual-polarization signal.
Claims18
A receiver, comprising:
- an optical signal acquisition unit, configured to:
- receive a dual-polarization signal;
- receive a local oscillation;
- perform polarization beam splitting processing on the dual-polarization signal to obtain signals of the dual-polarization signal in an X polarization direction and a Y polarization direction;
- perform polarization beam splitting processing on the local oscillation, separately, to obtain signals of the local oscillation in an X polarization direction and a Y polarization direction;
- an optical signal diversity unit connected to the optical signal acquisition unit, wherein the optical signal diversity unit is configured to:
- perform coupling processing on the signal of the dual-polarization signal in the X polarization direction;
- perform coupling processing on the signal of the local oscillation in the X polarization direction;
- obtain X polarized coupled signals with different phase shifts in the X polarization direction in accordance with the coupling processed dual-polarization signal in the X polarization direction and the coupling processed local oscillation in the X polarization direction;
- perform coupling processing on the signal of the dual-polarization signal in the Y polarization direction;
- perform coupling processing on the signal of the local oscillation in the Y polarization direction;
- and
- obtain Y polarized coupled signals with different phase shifts in the Y polarization direction in accordance with the coupling processed dual-polarization signal in the Y polarization direction and the coupling processed local oscillation in the Y polarization direction;
- a signal combination unit connected to the optical signal diversity unit, wherein the signal combination unit is configured to:
- perform signal combination on a group of one coupled signal in the X polarization direction and one coupled signal in the Y polarization direction, to obtain a combined signal;
- and
- convert the combined signal to an electrical signal;
- and
- a digital-signal acquisition unit connected to the signal combination unit, wherein the digital-signal acquisition unit is configured to:
- receive electrical signals;
- and
- generate a digital signal of an electrical signal of the dual-polarization signal in the X polarization direction and a digital signal of an electrical signal of the dual-polarization signal in the Y polarization direction according to the electrical signals.
19 more elements
A receiver, comprising:
- an optical signal acquisition unit, configured to:
- receive a dual-polarization signal;
- and
- perform polarization beam splitting processing on the dual-polarization signal, to obtain an X polarization direction signal and a Y polarization direction signal;
- a signal conversion unit, connected to the optical signal acquisition unit, wherein the signal conversion unit is configured to:
- convert the X polarization direction signal to an X polarized electrical signal;
- and
- convert the Y polarization direction signal to an Y polarized electrical signal;
- and
- a digital-signal conversion unit, connected to the signal conversion unit, wherein the digital-signal conversion unit is configured to convert the X polarized electrical signal and the Y polarized electrical signal to an X polarized digital signal and to a Y polarized digital signal, respectively;
- and
- wherein data in every three frames of the dual-polarization signal is a unit, wherein structures of the data in three frames successively comprise:
- {right arrow over (E)}Sx and {right arrow over (E)}Sy, {right arrow over (E)}Sx and −{right arrow over (E)}Sy, and −{right arrow over (E)}Sx and −{right arrow over (E)}Sy, wherein {right arrow over (E)}Sx is the X polarization direction signal, and wherein {right arrow over (E)}Sx is the Y polarization direction signal.
10 more elements
A method comprising:
- receiving a dual-polarization signal;
- receiving a local oscillation;
- performing polarization beam splitting processing on the dual-polarization signal to obtain signals of the dual-polarization signal in an X polarization direction and a Y polarization direction;
- performing polarization beam splitting processing on the local oscillation, separately, to obtain signals of the local oscillation in an X polarization direction and a Y polarization direction;
- performing coupling processing on the signal of the dual-polarization signal in the X polarization direction;
- performing coupling processing on the signal of the local oscillation in the X polarization direction;
- obtaining X polarized coupled signals with different phase shifts in the X polarization direction in accordance with the coupling processed dual-polarization signal in the X polarization direction and the coupling processed local oscillation in the X polarization direction;
- performing coupling processing on the signal of the dual-polarization signal in the Y polarization direction;
- performing coupling processing on the signal of the local oscillation in the Y polarization direction;
- obtaining Y polarized coupled signals with different phase shifts in the Y polarization direction in accordance with the coupling processed dual-polarization signal in the Y polarization direction and the coupling processed local oscillation in the Y polarization direction;
- performing signal combination on a group of one coupled signal in the X polarization direction and one coupled signal in the Y polarization direction, to obtain a combined signal;
- converting the combined signal to an electrical signal;
- receiving electrical signals;
- and
- generating a digital signal of an electrical signal of the dual-polarization signal in the X polarization direction and a digital signal of an electrical signal of the dual-polarization signal in the Y polarization direction according to the electrical signals.
12 more elements
Dependencies are inferred from the claim text.