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

Volume

12

Issue

10

fYear

2000

Firstpage

1367

Lastpage

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.

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.883832

Filename

883832