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Intrusion Detecting System With Polarization Dependent Sensing Elements

  • US 20100277719A1
  • Filed: 04/29/2009
  • Published: 11/04/2010
  • Est. Priority Date: 04/29/2009
  • Status: Active Grant
First Claim
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1. A detection system comprising:

  • (i) a length of optical fiber; and

    (iii) an OTDR coupled to said fiber, said OTDR comprising (a) a radiation source providing pulsed radiation to said fiber, (b) a detector detecting radiation that is backscattered through the fiber, and (c) a processor capable of analyzing the variation of the radiation that is backscattered through the fiber;

    wherein at least two polarization dependent sensing elements are positioned along the length of optical fiber.

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