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Reconfigurable optical add drop multiplexer core device, procedure and system using such device, optical light distributor, and coupling-ratio assigning procedure

  • US 8,116,629 B2
  • Filed: 04/08/2008
  • Issued: 02/14/2012
  • Est. Priority Date: 04/09/2007
  • Status: Active Grant
First Claim
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1. A reconfigurable optical add drop multiplexer core device comprising:

  • a light distributor configured to receive an optical signal along a primary input of the reconfigurable optical add drop multiplexer core device and to distribute the received optical signal along a plurality of subtending outputs to drop ports thereof;

    a coupling device configured to receive optical signals along a plurality of subtending inputs, to combine the received optical signals into a combined signal, and to output the combined signal; and

    first and second sets of add ports connected to the coupling device and configured to add signals locally from transponders, the coupling ratio of the coupling device being selected so that the insertion loss along a path from an add port of the second add-port set through the coupling device is less than the insertion loss along a path from an add port of the first add-port set through the coupling device.

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