Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2007-06-05
2007-06-05
Healy, Brian M. (Department: 2883)
Optical waveguides
With optical coupler
Plural
C385S015000, C385S123000, C398S025000, C398S027000, C398S049000, C346S0330WL
Reexamination Certificate
active
11513970
ABSTRACT:
An arrangement provides low cost path protection in an optical communications network. The arrangement has a portion3that provides (broadcasts) an outbound optical signal, and at least first and second transmitting portions202, 206transmit the outbound optical signal simultaneously onto at least first and second respective mutually distinct optical pathways231, 232. Meanwhile, a selection arrangement204selects among plural incoming optical signals (via1, 5) according to a SELECT control signal228to provide a selected signal, and an analyzer222analyzes characteristics of the selected signal to provide the SELECT control signal228.
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Birk Martin
Chiu Angela Lan
Strand John L.
AT&T Corp.
Healy Brian M.
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