Share Email Print
cover

Proceedings Paper

Pulse shape effects on the measurement of temperature using a Brillouin-based optical fiber sensor
Author(s): Carlos Galindez; Francisco-Javier Madruga; Adolfo Cobo; Olga Conde; Jose-Miguel Lopez-Higuera
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Distributed fiber sensing based on Brillouin gain scattering (BGS) principle is a useful way to develop devices capable to measure temperature or/and strain in optical fibers. New effects or technologies that could achieve a larger distance and/or a better spatial resolution are a topic of special interest in this fiber sensing area. The influence of the probe-pulse shape in the interaction between the pulsed light and the continuous wave laser in a pump-probe system is presented. The purpose of this study is to improve the spatial resolution of the measurement without losing stability in the BGS. Also it is showed how the backscattering Brillouin gain is affected by inducing variations on the final value of the BGS intensity; this effect is illustrated by using an experimental set up based on the Brillouin optical time-domain analysis (BOTDA). Theoretical analysis of the probe pulse in the Brillouin shift and intensity value using triangular, sinc and saw tooth shapes around the medium phonon life time (~10ns) are presented; as well as the experimental results and possible applications are explained.

Paper Details

Date Published: 7 May 2007
PDF: 8 pages
Proc. SPIE 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, 65720S (7 May 2007); doi: 10.1117/12.719432
Show Author Affiliations
Carlos Galindez, Univ. de Cantabria (Spain)
Francisco-Javier Madruga, Univ. de Cantabria (Spain)
Adolfo Cobo, Univ. de Cantabria (Spain)
Olga Conde, Univ. de Cantabria (Spain)
Jose-Miguel Lopez-Higuera, Univ. deCantabria (Spain)


Published in SPIE Proceedings Vol. 6572:
Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III
Michael J. Hayduk; Andrew R. Pirich; Peter J. Delfyett; Eric J. Donkor; John P. Barrios; Rebecca J. Bussjager; Michael L. Fanto; Robert L. Kaminski; Guifang Li; Hooman Mohseni; Edward W. Taylor, Editor(s)

© SPIE. Terms of Use
Back to Top