Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2006-05-09
2010-02-09
Pascal, Leslie (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S081000
Reexamination Certificate
active
07660528
ABSTRACT:
One embodiment of the present invention provides a system for mitigating Raman crosstalk between downstream data and video transmission in an Ethernet passive optical network (EPON), wherein the EPON includes an optical line terminal (OLT) and one or more optical network units (ONU's). During operation, the system transmits a data stream from the OLT to the ONU's on a first wavelength that is substantially at 1490 nm. The system also transmits a video signal stream from the OLT to the ONU's on a second wavelength that is substantially at 1550 nm. The system modifies the bit sequence for the data stream to change the power spectral distribution (PSD) for the data stream, thereby reducing power spectral content in the frequency range where significant Raman crosstalk can occur between data and video signal streams.
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Brown Benjamin J.
Hirth Ryan E.
Kramer Glen
Lamb Lowell D.
Park Vaughan & Fleming LLP
Pascal Leslie
Teknovus, Inc.
Yao Shun
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