Optical communications – Multiplex – Optical switching
Reexamination Certificate
2005-08-09
2005-08-09
Sedighian, M. R. (Department: 2633)
Optical communications
Multiplex
Optical switching
C398S051000, C398S054000, C398S083000, C385S017000, C385S018000
Reexamination Certificate
active
06928244
ABSTRACT:
An optical carrier drop/add transmission system and method for adding a signal to multiplexed input optical signals conveyed by an optical multiplex input line. The multiplexed input optical signals are demultiplexed to provide isolated input optical signals to an optical switch matrix comprising switches in an array of lines and columns, the isolated input optical signals being inputted in a direction parallel to a line of switches in the optical switch matrix. The added optical signal is input in a direction parallel to a column in the optical switch matrix. An output line is selected and the switch that is on the column on which the added optical signal is inputted and on the selected output line is switched.
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Goldstein Evan L.
Lin Lih-Yuan
Pu Chuan
Tkach Robert William
AT&T Corp.
Sedighian M. R.
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