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US 12,526,056 B2Granted
Apparatus and methods for mitigating multipath interference in fiber transmission system
AssigneeHuawei Technologies Co., Ltd.
InventorsYangjing Wen, Yan Cui, YuSheng Bai
Life of this patent
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Abstract
An optical receiver that includes an input port configured to receive intensity modulated optical signal with multipath interference (MPI); a detector configured to convert the intensity modulated optical signal with multipath interference to an electrical signal; a high pass filter (HPF) configured to filter the electrical signal and suppress carrier-carrier beat noise induced by the MPI to produce a filtered electrical signal; and an output port configured to transmit the filtered electrical signal.
Claims15
An optical receiver comprising:
- an input port configured to receive an intensity modulated optical signal with multipath interference (MPI);
- a detector configured to convert the intensity modulated optical signal with MPI to an electrical signal;
- a high pass filter (HPF) configured to filter the electrical signal and suppress carrier-carrier beat noise induced by the MPI to produce a filtered electrical signal, wherein the HPF introduces a filtering penalty that is dependent on a baud rate used in modulating data in the intensity modulated optical signal received by the optical receiver;
- and
- an output port configured to transmit the filtered electrical signal.
2 more elements
An optical receiver comprising:
- an input port configured to receive an intensity modulated optical signal with multipath interference (MPI);
- a detector configured to convert the intensity modulated optical signal with multipath interference to an electrical signal;
- a high pass filter (HPF) configured to filter the electrical signal and suppresses low frequency components induced by the MPI to produce a filtered electrical signal, wherein the HPF is a resistor-capacitor (RC) HPF with a surface mount capacitor on a microstrip transmission line or the HPF is an existing direct component (DC) block with a replacement capacitor, and wherein the HPF has a cut-off frequency in a range of 20 megahertz (MHz) to approximately 200 MHz;
- an output port configured to transmit the filtered electrical signal;
- and
- a transimpedance amplifier (TIA) configured to amplify the electrical signal.
3 more elements
Dependencies are inferred from the claim text.