Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2007-05-22
2007-05-22
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Plural
C385S027000, C398S043000, C398S048000, C398S081000
Reexamination Certificate
active
10473799
ABSTRACT:
The present invention discloses a high performance optical architecture for multiplexing and demultiplexing channels for use in high spectral efficiency optical systems. In general, the MUX and DeMUX architectures of the present invention will fall into two key sections or stages: a wavelength group section and a channel section. The group section makes use of characteristic associated with groups of multiplexed channels for separating said groups from an optical signal having a plurality of multiplexed groups. Advantageously, in preferred embodiments, the channel section is colorless (non-wavelength specific between groups) in order to reduce cost and complexity. With respect to the colorless channel section, components with free spectral ranges (FSRs) have been strategically added to provide repetitive optical filtering functions on group of channels (i.e., subsets of channels within each band of wavelengths) so that the colorless channel section can operate in any respective group identically. Hence each of said colorless channel sections are interchangeable. Advantageously Distortion compensation can be performed on a per group basis.
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Boertjes David W.
Roberts Kim B.
Borden Ladner Gervais LLP
Font Frank G.
Measures Jeffrey M.
Nortel Networks Limited
Peng Charlie
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