Differential Phase-Shift-Keying Technique-Based Brillouin Echo-Distributed Sensing

Author

Lee, Min Won ; Stiller, Birgit ; Hauden, Jérôme ; Maillotte, Hervé ; Roch, Carole ; Thévenaz, Luc ; Sylvestre, Thibaut

Author_Institution

Dept. d´´Opt. P. M. Duffieux, Univ. de Franche-Comte, Besancon, France

Volume

24

Issue

1

fYear

2012

Firstpage

79

Lastpage

81

Abstract

In this letter, we experimentally demonstrate Brillouin echoes-based distributed optical fiber sensing with centimeter spatial resolution. It is based on a differential phase-shift-keying technique using a single Mach-Zehnder modulator to generate a pump pulse and a π-phase-shifted pulse with an easy and accurate adjustment of delay. The results are compared to those obtained in standard Brillouin echo-distributed sensing system with two optical modulators and clearly show a resolution of 5 cm in a spliced segment between two fibers by applying a π -phase-shifted pulse of 500 ps.

Keywords

Brillouin spectra; fibre optic sensors; optical modulation; optical phase shifters; Brillouin echo distributed sensing; Mach Zehnder modulator; centimeter spatial resolution; differential phase shift keying technique; optical modulators; phase shifted pulse; Optical pulses; Optical pumping; Optical scattering; Optical sensors; Spatial resolution; Brillouin echo-distributed sensing; Brillouin optical time-domain analysis;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2172255

Filename

6046098