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    • Apparatus and method for fiber optic intrusion sensing 

      Taylor, Henry F.; Lee, Chung E. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 1993-03-16)
      Apparatus for sensing intrusion into a predefined perimeter comprises means for producing a coherent pulsed light, which is injected into an optical sensing fiber having a first predetermined length and positioned along ...