Advances in optical fibre distributed temperature sensing using Landau-Placzek ratio

Lees, G.P., Wait, P.C., Cole, M.J. and Newson, T.P. (1998) Advances in optical fibre distributed temperature sensing using Landau-Placzek ratio. IEEE Photonics Technology Letters, 10 (1), 126-128. (doi:10.1109/68.651134).

Abstract

This paper demonstrates the recent achievements in the field of optical fibre distributed temperature sensing utilising the Landau-Placzek ratio. We report a novel method of producing both the Rayleigh and Brillouin backscattered signals using a single laser source which may be scanned over 5nm to reduce coherent Rayleigh noise. A spatial resolution of 10 metres and temperature resolution of 1.4°C has now been achieved using this technique.

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