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

Abstract

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 vHz was found. The capability to simultaneously act as a temperature sensor is also demonstrated.

Uncontrolled Keywords: in-fibre Bragg gratings, measure megahertz acoustic fields, grating length, optical fibre, desensitisation, temperature sensor
Published Date: 1998-05-28
Authors: Fisher, N.E.
Webb, David J.
Pannell, C.N.
Jackson, David A.
Gavrilov, L.R.
Hand, J.W.
Zhang, Lin
Bennion, Ian

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