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Ultrasonic field and temperature sensor based on short in-fibre Bragg gratings

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8 Author(s)
Fisher, N.E. ; Appl. Opt. Group, Kent Univ., Canterbury, UK ; Webb, D.J. ; Pannell, C.N. ; Jackson, D.A.
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The authors demonstrate that in-fibre Bragg gratings may be successfully used to measure megahertz acoustic fields if the grating length is sufficiently short and the optical fibre is appropriately desensitised. A noise-limited pressure resolution of 4.5×10-3 atm/√Hz was found. The capability to simultaneously act as a temperature sensor is also demonstrated

Published in:

Electronics Letters  (Volume:34 ,  Issue: 11 )