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Mirror drift compensation in an optical circuit switch

  • US 8,712,239 B1
  • Filed: 09/27/2013
  • Issued: 04/29/2014
  • Est. Priority Date: 08/05/2013
  • Status: Active Grant
First Claim
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1. A method for making a connection in an optical circuit switch, comprising:

  • receiving a first make command to make a first optical connection between a first port and a second port, the first port uniquely associated with a rotatable mirror element;

    determining a first baseline voltage to be applied to an electrode coupled to the minor element to cause the minor element to rotate about an axis to make the first optical connection;

    applying the first baseline voltage to the electrode;

    periodically adjusting the voltage applied to the electrode to minimize an insertion loss of the first optical connection;

    periodically storing accumulated drift data in a memory, the accumulated drift data derived from a difference between the adjusted voltage applied to the first electrode and the first baseline voltage;

    receiving a break command to break the first optical connection;

    applying an at-rest voltage to the first electrode; and

    decaying the accumulated drift data in accordance with a predetermined decay function.

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