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Measurement of arbitrary strain profiles within fibre gratings

Measurement of arbitrary strain profiles within fibre gratings

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Results from the first measurement of an arbitrary strain field within a fibre Bragg grating are presented. Low coherence reflectometry has been used, together with a wavelength-tunable reference grating, to obtain strain against distance measurements.

References

    1. 1)
      • Formation of Bragg gratings in optical fibres by a transverse holographicmethod
    2. 2)
      • Barcelos, S., Zervas, M.N., Laming, R.I., Payne, D.N.: `Interferometric fibre grating characterisation', IEEColloquium Fibre Gratings and Their Applications, 30 January 1995, London, UK, p. 5/1–7
    3. 3)
      • Huang, S.H., Ohn, M.M., Measures, R.M.: `A novel Bragg grating distributed-strain sensor based on phasemeasurements', Conf. Smart Sensing, Processing and Instrumentation, 27 February – 1 March 1995, 2444, SPIE, San Diego, CA, p. 158–169
    4. 4)
      • Low coherence technique to characterise reflectivity and time delay asa function of wavelength within a long fibre grating
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