27 November 1996 Distributed strain sensing using long intracore fiber Bragg gratings
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Abstract
We report on two possible techniques of short distributed strain measurements along a length of a single fiber Bragg gratings (FBG). The first technique relies on the spectral shape, the second is based on the group delay response of the FBG. A theoretical comparison of the two techniques were made and later applied to determine the strain distribution around a hole in a loaded aluminum plate. Monotonically varying strain measurements were made with a spatial resolution that was dependent on the strain gradient at that point. A spatial resolution as small as approximately 0.8 mm was obtained over the steep parts of the strain variation.
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Myo Myint Ohn, Myo Myint Ohn, Shang Yuan Huang, Shang Yuan Huang, Michel LeBlanc, Michel LeBlanc, Raymond M. Measures, Raymond M. Measures, Simon Sandgren, Simon Sandgren, Raoul Stubbe, Raoul Stubbe, "Distributed strain sensing using long intracore fiber Bragg gratings", Proc. SPIE 2838, Distributed and Multiplexed Fiber Optic Sensors VI, (27 November 1996); doi: 10.1117/12.259817; https://doi.org/10.1117/12.259817
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