Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2007-10-23
2007-10-23
Vanderpuye, Kenneth (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S083000, C398S084000, C398S085000, C398S041000, C398S043000, C398S048000, C398S049000, C398S068000, C385S024000, C385S031000
Reexamination Certificate
active
10869663
ABSTRACT:
An optical add/drop multiplexer (OADM) adapted to route optical signals having at least two different bit rates. The OADM has at least two sets of DWDM channels, e.g., with channels in a first set having a first bandwidth value suitable for the transmission of 10-Gb/s signals and channels in a second set having a second bandwidth value suitable for the transmission of 40-Gb/s signals. The first and second sets occupy two different spectral bands and the first set has two subsets of interleaved channels. In one embodiment, the OADM has first and second optical branches adapted to process optical signals corresponding to first and second groups of channels, respectively. The first group includes a first subset from the first set while the second group includes the second set and a second subset from the first set. Advantageously, OADMs of the invention may be used to create independent processing paths for different groups of channels. As a result, a communication system having those OADMs can be upgraded, e.g., to add a new 40-Gb/s service and/or to populate additional 10-Gb/s channels substantially without interrupting the 10-Gb/s service already in place.
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Fishman Daniel A.
Liu Xiang
Silverio Vincent John
Thompson William A.
Ying Jinpin
Liu Li
Lucent Technologies - Inc.
Vanderpuye Kenneth
LandOfFree
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