公开(公告)号：US11716150B2

公开(公告)日：2023-08-01

申请号：US16811194

申请日：2020-03-06

Applicant: Nokia Solutions and Networks OY

Inventor： Qian Hu ,  Robert Borkowski

IPC: H04B10/60 ,  H04B10/69

CPC classification number: H04B10/6911 ,  H04B10/697 ,  H04B10/6932 ,  H04B10/6933

Abstract: An optical receiver capable of substantially measuring the phase and amplitude of a received intensity- or amplitude-modulated optical signal by performing digital-signal processing. In an example embodiment, a DSP of the receiver operates to reduce the detrimental effects of relative phase noise between the optical reference oscillator and optical carrier based on an optical pilot present in the received optical signal. The DSP may employ a sequence of digital filters configured to select a signal component that represents a non-vestigial modulation sideband and then perform signal equalization thereon. The signal equalization may include but is not limited to dispersion compensation. In some embodiments, the optical receiver can be a direct-detection optical receiver. In an example embodiment, the optical reference oscillator and optical carrier are generated using two respective independently running lasers that may or may not be co-located.

公开(公告)号：US20210281326A1

公开(公告)日：2021-09-09

申请号：US16811194

申请日：2020-03-06

Applicant: Nokia Solutions and Networks OY

Inventor： Qian Hu ,  Robert Borkowski

IPC: H04B10/69

Abstract: An optical receiver capable of substantially measuring the phase and amplitude of a received intensity- or amplitude-modulated optical signal by performing digital-signal processing. In an example embodiment, a DSP of the receiver operates to reduce the detrimental effects of relative phase noise between the optical reference oscillator and optical carrier based on an optical pilot present in the received optical signal. The DSP may employ a sequence of digital filters configured to select a signal component that represents a non-vestigial modulation sideband and then perform signal equalization thereon. The signal equalization may include but is not limited to dispersion compensation. In some embodiments, the optical receiver can be a direct-detection optical receiver. In an example embodiment, the optical reference oscillator and optical carrier are generated using two respective independently running lasers that may or may not be co-located.