Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2005-01-18
2005-01-18
Healy, Brian M. (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S031000, C385S088000, C385S089000, C385S015000, C398S025000, C398S030000
Reexamination Certificate
active
06845189
ABSTRACT:
A terminal is connected to a communication link comprising a ribbon fiber for communication in two directions over pairs of fiber in the ribbon. For each incoming fiber in the ribbon fiber a receiver is connected to an amplifier/detector which emits detection signals on line. The detection signals indicate that there is sufficient optical power in the corresponding incoming fibers and are supplied via gates to control units. These control whether electric signals incoming on lines are to be conveyed further to transmitters for being sent on the outgoing fibers. A channel selector unit delivers selector signals to the gates so that when insufficient optical power exists in an incoming fiber the corresponding transmitter is only permitted to transmit during short repeated periods and is shut off in between.
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Healy Brian M.
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (publ)
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