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Optical protection switch with broadcast multi-directional capability

  • US 10,511,401 B2
  • Filed: 09/30/2017
  • Issued: 12/17/2019
  • Est. Priority Date: 09/30/2017
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a first reconfigurable optical add/drop multiplexer (ROADM) configured to receive a first optical signal on a first optical channel;

    a second ROADM configured to receive a second optical signal on a second optical channel;

    a reconfigurable optical switch including;

    a first switch, configured to be in optical communication with the first ROADM and switchable between a first state and a second state, to transmit the first optical signal at the first state and block the first optical signal at the second state;

    a second switch, configured to be in optical communication with the second ROADM and switchable between the first state and the second state, to transmit the second optical signal at the first state and block the second optical signal at the second state; and

    an output port, in optical communication with the first switch and the second switch, to transmit an output signal that is a sum of possible optical signals transmitted through the first switch and the second switch; and

    a first detector, operatively coupled to the first optical channel, to detect an amplitude of the first optical signal, in response to the amplitude of the first optical signal less than a threshold value, the first switch being turned to the second state to block the first optical signal and the second switch being turned to the first state to transmit the second optical signal to the output port.

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