Technique for measuring distributed temperature with 35-cm spatial resolution utilizing the Landau-Placzek ratio

Author

Kee, H.H. ; Lees, G.P. ; Newson, T.P.

Author_Institution

Optoelectron. Res. Centre, Southampton Univ., UK

Volume

12

Issue

7

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

873

Lastpage

875

Abstract

The authors report a spontaneous Brillouin-based distributed temperature sensing (DTS) system using a short-pulsewidth laser source at 1.5 μm, which permits measurements down to an accuracy of 35-cm spatial resolution. This DTS system has been demonstrated utilizing conventional single-mode silica fibers for a range of 1 km from a single-ended source, and a temperature resolution of 4.3/spl deg/C was achieved.

Keywords

Brillouin spectra; Mach-Zehnder interferometers; distributed sensors; fibre optic sensors; measurement by laser beam; measurement errors; optical resolving power; temperature measurement; temperature sensors; 1 km; 1.5 mum; Landau-Placzek ratio; Mach Zehnder interferometers; distributed temperature measurement; fibre optic sensors; measurement accuracy; photodetectors; short-pulsewidth laser source; single-ended source; single-mode silica fibers; spatial resolution; spontaneous Brillouin-based distributed temperature sensing system; temperature resolution; Acoustic pulses; Brillouin scattering; Fiber lasers; Optical fiber sensors; Pulse measurements; Silicon compounds; Spatial resolution; Temperature measurement; Temperature sensors; Time domain analysis;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.853531

Filename

853531