Optical communications – Multiplex – Hybrid
Reexamination Certificate
2007-01-23
2007-01-23
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Hybrid
C398S079000, C398S082000, C398S084000, C398S085000, C398S087000, C398S091000, C398S098000, C385S024000, C385S037000
Reexamination Certificate
active
09886998
ABSTRACT:
A method and an apparatus are provided to demultiplex an optical signal having a plurality of channels at a predetermined channel spacing having demultiplexing means with a frequency spacing larger than the predetermined channel spacing for receiving the optical signal and for dividing the optical signal by wavelength into a plurality of wavelength streams broader than the predetermined channel spacing, time domain demultiplexing means for receiving one of the plurality of wavelength streams and for dividing the one of the plurality of wavelength streams into a plurality of time domain demultiplexed wavelength streams, and optical filtering means for demultiplexing one of the plurality of time domain demultiplexed wavelength streams into a single channel. Advantageously, splitting means are provided to split the optical signal into sub-signals before launching them into the demultiplexing means.
REFERENCES:
patent: 5652814 (1997-07-01), Pan et al.
patent: 5710649 (1998-01-01), Mollenauer
patent: 6118564 (2000-09-01), Ooi et al.
patent: 6205268 (2001-03-01), Chraplyvy et al.
patent: 6782203 (2004-08-01), Lin et al.
Hall, Vande Sande & Pequignot LLP
JDS Uniphase Inc.
Pequignot Matthew A.
Phan Hanh
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