Conference Publications

Title

Differential pulse-width pair BOTDA with fast fall-time pulses

Authors (PARTNER)

A. Minardo, R. Bernini, L. Zeni (SUN)

Name and/or number of magazine/newspaper/journal…

Proc. of IEEE Sensors 2011, Limerick, 28 October 2011 – 1 November 2011, pp. 897-900.

ISBN: 978-1-4244-9288-6/11

DOI:10.1109/ICSENS.2011.6127187

Abstract

In this work we demonstrate the possibility to improve the spatial resolution in differential pulse-width pair Brillouin Optical time-domain Analysis (DPP-BOTDA) by reducing the fall time of the optical pump pulses. It is shown that while rise time has a negligible influence on spatial resolution, the fall time of the pump pulses determines the spectral purity of the acquired Brillouin gain spectra for a given perturbation width. Numerical simulations and experimental results confirm the improvement associated to the use of optical pulses with shorter fall time.


 

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