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Optical-Fiber Leak DetectorProposed optical-fiber sensor detects small changes in pressure in elastomeric O-ring or similar pressure seal, which may indicate deterioration of seal and interpreted as indications of incipient failure. According to concept, length of optical fiber embedded in seal. Light-emitting diode illuminates one end of fiber; photodetector measures intensity of light emerging from other end. Pressure-induced changes in seal bend fiber slightly, altering microbending-induced loss of light from fiber and alter intensity of light at photodetector. Change in intensity approximately proportional to change in pressure.
Document ID
19940000403
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Workman, Gary L.
(Alabama Univ.)
Kosten, Susan E.
(Alabama Univ.)
Date Acquired
August 16, 2013
Publication Date
July 1, 1994
Publication Information
Publication: Laser Tech. Brief.
Volume: 2
Issue: 3
Subject Category
Physical Sciences
Report/Patent Number
MFS-26242
Accession Number
94B10403
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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