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Optical switching system with a colorless, directionless, and contentionless ROADM connected to unamplified drop channels

  • US 9,742,520 B1
  • Filed: 09/18/2015
  • Issued: 08/22/2017
  • Est. Priority Date: 09/19/2014
  • Status: Active Grant
First Claim
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1. A method of routing optical signals for a lower optical noise network, the method comprising:

  • routing a combined input optical signal with no more than N signals for routing through an unamplified reconfigurable optical add-drop multiplexer (ROADM), wherein the input optical signal has an optical signal-to-noise value of at least about 16.5 dB, to 1 to M optical receivers configured on separate optical pathways and having a bit error rate of no more than about 1×

    10

    2
    , wherein the ROADM comprises N 1×

    N WSS and a N×

    M multicast switch, which can be a single unit or a set of connected expandable units.

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