Dual-parameter optical waveguide grating sensing device and sensor
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United States of America Patent
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Dec 21, 2004
Grant Date -
May 8, 2003
app pub date -
Sep 17, 2002
filing date -
Nov 2, 2001
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Expired
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Abstract
In the present invention an optical waveguide grating sensing device for a dual-parameter optical waveguide grating sensor includes a first optical waveguide grating of a first resonant wavelength provided in a first section of an optical waveguide and a second optical waveguide grating of a second resonant wavelength provided in a second of an optical waveguide. The first and second gratings have different coefficients of rate of change of wavelength as a function of temperature and have substantially the same coefficient of rate of change of wavelength as a function of stain.
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