Modal domain optical fiber sensors

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dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.contributor.inventorClaus, Richard O.en
dc.contributor.inventorBennett, K. D.en
dc.date.accessed2016-08-19en
dc.date.accessioned2016-08-24T17:53:44Zen
dc.date.available2016-08-24T17:53:44Zen
dc.date.filed1987-07-27en
dc.date.issued1989-08-08en
dc.description.abstractA modal domain optical fiber sensor for vibration monitoring and as a mechanical motion detector. A laser that focuses coherent light through a lens into one end of a multimode optical fiber. The fiber is secured to a mechanical mechanism for exciting vibrations. The other end of the optical fiber passes its output through a spatial filter and into a photodetector. A variable voltage signal from the photodetector is fed to a monitoring unit, such as an oscilloscope or a microcomputer, for analysis. Of particular significance is the intentional mismatch between the wavelength of the light 18 from the laser and the single mode cut-off wavelength of the glass optical fiber. In a preferred embodiment, the optical fiber has a wavelength of 850 nm and the coherent light has a wavelength of 633 mm.en
dc.format.mimetypeapplication/pdfen
dc.identifier.applicationnumber7077931en
dc.identifier.patentnumber4854706en
dc.identifier.urihttp://hdl.handle.net/10919/72308en
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/06/547/048/0.pdfen
dc.language.isoenen
dc.publisherUnited States Patent and Trademark Officeen
dc.subject.cpcG01H9/004en
dc.subject.cpcG01D5/35351en
dc.subject.uspc356/477en
dc.subject.uspcother356/482en
dc.titleModal domain optical fiber sensorsen
dc.typePatenten
dc.type.dcmitypeTexten
dc.type.patenttypeutilityen

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