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dc.creatorTaylor, Henry F.
dc.creatorLee, Chung E.
dc.date.accessioned2019-06-17T16:54:23Z
dc.date.available2019-06-17T16:54:23Z
dc.date.issued1993-03-16
dc.identifier.urihttp://hdl.handle.net/1969.1/176477
dc.description.abstractApparatus 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 the predefined perimeter. A backscattered light in response to receiving the coherent light pulses is produced and coupled into an optical receiving fiber. The backscattered light is detected by a photodetector and a signal indicative of the backscattered light is produced. An intrusion is detectable from the produced signal as indicated by a change in the backscattered light. To increase the sensitivity of the apparatus, a reference fiber and an interferometer may also be employed.en
dc.languageeng
dc.publisherUnited States. Patent and Trademark Office
dc.rightsPublic Domain (No copyright - United States)en
dc.rights.urihttp://rightsstatements.org/vocab/NoC-US/1.0/
dc.titleApparatus and method for fiber optic intrusion sensingen
dc.typeUtility patenten
dc.format.digitalOriginreformatted digitalen
dc.description.countryUS
dc.contributor.assigneeTexas A & M University System
dc.identifier.patentapplicationnumber07/737449
dc.subject.uspcprimary340/557
dc.subject.uspcother340/541
dc.subject.uspcother340/600
dc.subject.uspcother340/666
dc.date.filed1991-07-29
dc.publisher.digitalTexas A&M University. Libraries


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