Transient response in high-resolution Brillouin-based distributed sensing using probe pulses shorter than the acoustic relaxation time


We perform numerical simulations on a model describing a Brillouin-based temperature and strain sensor, testing its response when it is probed with relatively short pulses. Experimental results were recently published [e.g., Opt. Lett. 24, 510 (1999)] that showed a broadening of the Brillouin loss curve when the probe pulse duration is reduced, followed by a sudden and rather surprising reduction of the linewidth when the pulse duration gets shorter than the acoustic relaxation time. Our study reveals the processes responsible for this behavior. We give a clear physical insight into the problem, allowing us to define the best experimental conditions required for one to take the advantage of this effect.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2000 Optical Society of America
Uncontrolled Keywords: Brillouin-based temperature,strain sensor,short pulses,linewidth,pulse duration,acoustic relaxation time
Publication ISSN: 1539-4794
Last Modified: 14 Jun 2024 07:07
Date Deposited: 12 May 2011 09:54
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Related URLs: http://www.opti ... URI=ol-25-3-156 (Publisher URL)
PURE Output Type: Article
Published Date: 2000-02-01
Authors: Lecoeuche, V.
Webb, David J. (ORCID Profile 0000-0002-5495-1296)
Pannell, C.N.
Jackson, David A.



Version: Published Version

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