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Optical switch fabric with bias control

  • US 9,485,552 B1
  • Filed: 01/28/2016
  • Issued: 11/01/2016
  • Est. Priority Date: 01/28/2016
  • Status: Active Grant
First Claim
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1. A method for bias control in an optical switch fabric, comprising:

  • monitoring optical power at outputs of a plurality of switch elements in an N×

    N switch fabric that has N inputs, N outputs, and M≧

    2 stages;

    monitoring individual optical power at the outputs of every switch element in the switch fabricadjusting a bias control of a first of the plurality of switch elements;

    determining, using a processor, whether the optical power at the outputs of the first switch element after bias control adjustment match a predetermined harmonic signature more closely than the monitored optical power at the outputs of the first switch element prior to adjustment; and

    repeating said steps of adjusting and determining for each of the remainder of the plurality of switch elements.

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