Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2007-12-11
2007-12-11
Singh, Dalzid (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S085000, C398S030000, C398S031000
Reexamination Certificate
active
11461717
ABSTRACT:
A node is provided in an optical communications network that utilizes a first set of add/drop filter elements for extracting and combining optical signals that are carried on wavelength division multiplexed channels in a first wavelength band. Additionally, an extraction element and a combining element for dropping and adding a service channel associated with the wavelength division multiplexed channels. The extraction element is arranged downstream of the add/drop filter elements. The extraction and combining elements are additionally adapted to drop and add, respectively, at least one further wavelength band carrying at least one optical traffic data channel.
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Öberg Magnus G.
Persson Ulf A.
Singh Dalzid
Telefonaktiebolaget LM Ericsson (publ)
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