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U.S. Department of Energy
Office of Scientific and Technical Information

Fiber-optic strain gauge with attached ends and unattached microbend section

Patent ·
OSTI ID:868402

A strain gauge is made of an optical fiber into which quasi-sinusoidal microbends have been permanently introduced. The permanent microbends cause a reduction in the fiber's optical transmission, but, when the gauge is attached to a substrate that is subsequently strained, the amplitude of the deformations will diminish and the optical transmission through the fiber will increase. An apparatus and process for manufacturing these microbends into the optical fiber through a heat-set process is employed; this apparatus and process includes a testing and calibration system.

Research Organization:
AT & T CORP
DOE Contract Number:
AC04-76DP00789
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5132529
OSTI ID:
868402
Country of Publication:
United States
Language:
English

References (3)

Microbending effects on monomode light propagation in multimode fibers journal January 1983
Fiber microbend acoustic sensor journal January 1980
Fiber optic pressure sensor journal March 1980