20-km distributed temperature sensor based on spontaneous Brillouin scattering

Lecoeuche, V.; Hathaway, M.W.; Webb, David J.; Pannell, C.N. and Jackson, David A. (2000). 20-km distributed temperature sensor based on spontaneous Brillouin scattering. IEEE photonics technology letters, 12 (10), pp. 1367-1369.

Abstract

We report on a novel experimental setup for distributed measurement of temperature, based on spontaneous Brillouin scattering in optical fiber. We have developed a mode-locked Brillouin fiber ring laser in order to generate the dual frequency source required for a heterodyne detection of the backscattered signal. This relatively simple system enables temperature measurements over 20 km with a spatial resolution of 7 m.

Uncontrolled Keywords: Brillouin scattering, fiber lasers, frequency, laser mode locking, optical fiber sensors, optical fibers, ring lasers, signal generators, temperature sensors, acousto-optical modulation, distributed sensors, fibre lasers, fibre optic sensors, heterodyne detection, optical fibre testing, stimulated Brillouin scattering, 20 km, backscattered signal, distributed temperature measurement, distributed temperature sensor, dual frequency source, mode-locked Brillouin fiber ring laser, optical fiber testing, spatial resolution, spontaneous Brillouin scattering, temperature measurements
Published Date: 2000-10

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