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Stimulated Brillouin scattering using short probe pulses: An unsuspected transient response with advantageous consequences in distributed sensing at high spatial resolution

By V. Lecoeuche, David J. Webb, Christopher N. Pannell and David A. Jackson

Abstract

We perform numerical simulations on a model describing a Brillouin based temperature and strain sensor, testing its response when probed with relatively short pulses. Experimental results were recently published 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 of the best experimental conditions required to take advantage of this effect

Topics: QC
Publisher: International Society for Optical Engineering
Year: 2000
OAI identifier: oai:kar.kent.ac.uk:16302
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