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

Lecoeuche, V.; Webb, David J.; Pannell, C.N. and Jackson, David A. (2000). Transient response in high-resolution Brillouin-based distributed sensing using probe pulses shorter than the acoustic relaxation time. Optics letters, 25 (3), pp. 156-158.

Abstract

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: https://doi.org/10.1364/OL.25.000156
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: © 2000 Optical Society of America
Uncontrolled Keywords: Brillouin-based temperature, strain sensor, short pulses, linewidth, pulse duration, acoustic relaxation time
Published Date: 2000-02-01

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