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首页> 外文期刊>Optics Letters >Transient response in high-resolution Brillouin-based distributed sensing using probe pulses shorter than the acoustic relaxation time
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Transient response in high-resolution Brillouin-based distributed sensing using probe pulses shorter than the acoustic relaxation time

机译：短于声弛豫时间的探测脉冲在基于布里渊的高分辨率分布式传感中的瞬态响应

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摘要

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.
机译：我们在描述基于布里渊的温度和应变传感器的模型上执行数值模拟，以较短的脉冲探测其响应时测试其响应。最近发表了实验结果[例如，选项来吧24，510（1999）]表明，当减小探针脉冲持续时间时，布里渊损耗曲线变宽，而当脉冲持续时间短于声弛豫时间时，线宽突然而令人惊讶地减小。我们的研究揭示了造成这种行为的过程。我们对问题给出了清晰的物理见解，使我们能够定义一个人可以利用这种效应所需的最佳实验条件。

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