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Polarization-based sensor for secure fiber optic network and other security applications

  • US 20070069893A1
  • Filed: 03/03/2006
  • Published: 03/29/2007
  • Est. Priority Date: 03/04/2005
  • Status: Abandoned Application
First Claim
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1. A method of sensing an attempted intrusion comprising:

  • transmitting light of at least one known state of polarization within a first optical fiber, wherein said first optical fiber is in proximity to a secured element, and wherein said light originates from a polarized source;

    receiving said light at a fiber optic polarizer, wherein said fiber optic polarizer is in line with said first optical fiber; and

    identifying an attempted intrusion of said secured element from a change in the state of polarization of said light.

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