Optical fiber grating sensors and methods of manufacture
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United States of America Patent
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Mar 24, 2015
Grant Date -
May 14, 2009
app pub date -
Sep 23, 2008
filing date -
Feb 22, 2006
priority date (Note) -
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Abstract
Systems and methods comprise or involve optical fibers having Bragg gratings. The optical fibers can be assembled in a parallel manner into a fiber sensor configuration. Bragg gratings can be written onto different cores of optical fibers. Bragg gratings may be written at a same or nearly same axial position for all optical fibers in the configuration and may be written at the same time and may have a substantially equal index of refraction variation and unequal lengths. Spaced Bragg gratings may also have characteristic sidelobe spectrums for tagging the respective gratings. Gratings can also be written at different wavelengths and over another grating at the same location.
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