Novel Technique to Improve Spatial Resolution in Brillouin Optical Time-Domain Reflectometry

Author

Koyamada, Y. ; Sakairi, Y. ; Takeuchi, N. ; Adachi, S.

Author_Institution

Ibaraki Univ., Ibaraki

Volume

19

Issue

23

fYear

2007

Firstpage

1910

Lastpage

1912

Abstract

A novel Brillouin optical time-domain reflectometry (BOTDR) system, called a double-pulse BOTDR (DP-BOTDR) system, is proposed for measuring distributed strain and temperature in a fiber with a sub-meter spatial resolution. Our experiment confirmed that the DP-BOTDR system enables us to measure the distributed Brillouin frequency shift, i.e., the distributed strain and temperature, with a spatial resolution of 20 cm. This spatial resolution is five times better than that provided by the conventional single-pulse BOTDR system.

Keywords

Brillouin spectra; fibre optic sensors; optical fibre testing; optical time-domain reflectometry; spectral methods of temperature measurement; strain measurement; Brillouin optical time-domain reflectometry; distributed Brillouin frequency shift; double-pulse BOTDR; spatial resolution; sub-meter spatial resolution; Acoustic scattering; Brillouin scattering; Frequency measurement; Optical scattering; Optical sensors; Reflectometry; Spatial resolution; Strain measurement; Temperature sensors; Time domain analysis; Brillouin scattering; distributed sensor; fiber sensor; optical time-domain reflectometry (OTDR); strain measurement; temperature measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.908651

Filename

4383194