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arXiv 0708.0141physics.optics
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利用超短脉冲确定颗粒尺寸和密度分布

Using ultra-short pulses to determine particle size and density distributions

Chris J. Lee, Peter J. M. van der Slot, Klaus. -J. Boller

摘要:

分析了强散射介质对超短光脉冲的时间响应。采用随机游走技术模拟了超短脉冲光在具有随机形状和不同堆积密度的介质中传播时的光散射。脉冲扩展被发现是强烈依赖于平均粒径,粒径分布,和包装分数。我们还表明,作为时间延迟的函数的强度可以用来分析的粒径分布和包装分数的光学厚样品独立的吸收功能的存在。最后,我们提出了一种全新的方法来测量超短脉冲的形状,通过SSM传播。

英文摘要:

We analyze the time dependent response of strongly scattering media (SSM) to ultra-short pulses of light. A random walk technique is used to model the optical scattering of ultra-short pulses of light propagating through media with random shapes and various packing densities. The pulse spreading was found to be strongly dependent on the average particle size, particle size distribution, and the packing fraction. We also show that the intensity as a function of time-delay can be used to analyze the particle size distribution and packing fraction of an optically thick sample independently of the presence of absorption features. Finally, we propose an all new way to measure the shape of ultra-short pulses that have propagated through a SSM.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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