Effects of Intensity Modulation of Light Source on Brillouin Optical Correlation Domain Analysis

Author

Song, Kwang-Yong ; He, Zuyuan ; Hotate, Kazuo

Author_Institution

Dept. of Electron. Eng., Univ. of Tokyo

Volume

25

Issue

5

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

1238

Lastpage

1246

Abstract

The effects of the intensity modulation (IM) of light source on fiber-distributed sensors based on Brillouin optical correlation domain analysis (BOCDA) are analyzed by numerical simulation, and the results are experimentally confirmed. We show that the shape of the Brillouin gain spectrum in the BOCDA system has a particular dependence on the optical spectrum of light source and that it can be controlled and tailored by proper modification of the optical spectrum using an additional IM. In the experiments, we applied several IM waveforms based on the simulation results for confirmation. Additionally, a distributed strain measurement along a 1-km optical fiber with a 30-cm spatial resolution is demonstrated by applying a proper IM scheme, which is the longest range reported using the BOCDA system

Keywords

Brillouin spectra; distributed sensors; fibre optic sensors; intensity modulation; light sources; optical correlation; optical modulation; strain measurement; 1 km; Brillouin optical correlation domain analysis; distributed strain measurement; fiber-distributed sensors; intensity modulation; light source; Intensity modulation; Light sources; Lighting control; Numerical simulation; Optical control; Optical fiber sensors; Optical modulation; Optical sensors; Shape control; Strain measurement; Brillouin scattering; correlation; intensity modulation (IM); optical fiber measurements; strain measurement;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2007.893904

Filename

4167973