Distributed Fiber Strain Sensor With 1-kHz Sampling Rate Based on Brillouin Optical Correlation Domain Analysis

Author

Song, Kwang Yong ; Hotate, Kazuo

Author_Institution

Chung-Ang Univ., Seoul

Volume

19

Issue

23

fYear

2007

Firstpage

1928

Lastpage

1930

Abstract

We report the highest speed distributed sensing of dynamic strain based on stimulated Brillouin scattering in optical fibers. A sampling rate of 1 kHz, more than an order of magnitude higher than the former best result, is achieved by applying a simplified Brillouin optical correlation domain analysis with optimized time gates and an unbalanced Mach-Zehnder delay line. In experiments, we present the measurement of various dynamic strains at the maximum frequency of 200 Hz with 10-cm spatial resolution and 20-m measurement range.

Keywords

distributed sensors; fibre optic sensors; optical correlation; stimulated Brillouin scattering; strain sensors; 1-kHz sampling rate; Brillouin optical correlation domain analysis; Mach-Zehnder delay line; distributed fiber strain sensor; dynamic strains; optical fibers; Brillouin scattering; Capacitive sensors; Fiber nonlinear optics; Frequency measurement; Optical fiber sensors; Optical fibers; Optical scattering; Optical sensors; Sampling methods; Stimulated emission; Brillouin scattering; correlation; distributed detection; modulation; nonlinear optics; optical fiber measurements;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.908772

Filename

4383197