Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate
2007-02-06
2007-02-06
Lee, John D. (Department: 2874)
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
C385S010000, C385S037000
Reexamination Certificate
active
10543442
ABSTRACT:
Extensometer with flexible test specimen and Bragg gratings applied in particular to the monitoring of concrete structures, is configured to measure deformations of a host material and comprises at least one test specimen which undergoes linear bending stresses, and at least one Bragg grating formed in an optic fibre and fixed to the test specimen. The extensometer configured such that any deformation of the host material is transmitted to the grating via the test specimen. The extensometer also comprises mechanical means which transform deformation of the material into bending of the test specimen, which deforms the grating.
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patent: 2004/0114850 (2004-06-01), Dewyntermarty et al.
patent: 2005/0169568 (2005-08-01), Shang et al.
patent: 199 22 102 (2000-12-01), None
patent: 00/60312 (2000-10-01), None
Ferdinand, Pierre et al., “Mine Operating AccurateStability Control with Optical Fiber Sensing and Bragg Grating Technology: The European Brite/EuramStabilosProject,” Journal of Lightwave Technology, vol. 13, No. 7, pp. 1303-1313, Jul. 1995.
Ferdinand Pierre
Rougeault Stephane
Brown Thelen Reid
Commissariat A L'Energie Atomique
Lee John D.
Raysman & Steiner LLP
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