Upgradeable optical add/drop multiplexer

Details Upgradeable optical add/drop multiplexer Upgradeable optical add/drop multiplexer

2007-10-09

2007-10-09

Chan, Jason (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S082000, C398S083000, C398S088000, C385S024000, C385S027000, C385S042000, C385S047000, C385S049000

Reexamination Certificate

active

10650936

ABSTRACT:
An OADM includes optical input and output; first and second bandpass filters with a first pass band, optically coupled to the optical input and output, respectively; third and fourth bandpass filters with a second pass band, optically coupled to reflection ports of the first and second bandpass filters, respectively; first and second cascaded series of channel filter assemblies optically coupled to the transmission ports of the first and second bandpass filters, respectively, and third and fourth cascaded series of channel filter assemblies optically coupled to the transmission ports of the third and fourth bandpass filters, respectively. The OADM may be extended or upgraded so as to accommodate the throughput of additional channels or wavelengths by extending the number of filters within each cascaded series of bandpass filters, where the transmission ports of the additional bandpass filters are optically coupled to respective additional cascaded series of channel filter assemblies.

REFERENCES:
patent: 5943149 (1999-08-01), Cearns et al.
patent: 6711986 (2004-03-01), Angione
patent: 6744986 (2004-06-01), Vohra

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