Title :
20-km distributed temperature sensor based on spontaneous Brillouin scattering
Author :
Lecoeuche, V. ; Hathaway, M.W. ; Webb, D.J. ; Pannell, C.N. ; Jackson, D.A.
Author_Institution :
Appl. Opt. Group, Kent Univ., Canterbury, UK
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.
Keywords :
acousto-optical modulation; distributed sensors; fibre lasers; fibre optic sensors; heterodyne detection; optical fibre testing; ring lasers; stimulated Brillouin scattering; 20 km; backscattered signal; distributed temperature measurement; distributed temperature sensor; dual frequency source; heterodyne detection; mode-locked Brillouin fiber ring laser; optical fiber testing; spatial resolution; spontaneous Brillouin scattering; temperature measurements; Brillouin scattering; Fiber lasers; Frequency; Laser mode locking; Optical fiber sensors; Optical fibers; Ring lasers; Signal generators; Temperature measurement; Temperature sensors;
Journal_Title :
Photonics Technology Letters, IEEE
