arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.4483physics.optics
收藏

脉冲通过色散腔内介质的传播

Pulse propagation through a dispersive intracavity medium

Honam Yum, Youngjoon Jang, Selim Shahriar

摘要:

本文从理论上研究了激光脉冲在腔内快光介质中的传输特性。使用传递函数来确定脉冲通过腔体之后的脉冲的方法是公知的。然而,这种方法不能用于确定腔内脉冲的行为。为了规避这一约束,我们使用的方法,首先找到一个自洽的解决方案的单色场的无限的空间和时间范围,并确定其振幅之前,内部和之后的腔。然后,我们通过添加一组这些波来构建高斯输入脉冲,适当地定相和加权,以表示腔之前的移动脉冲。在不同的时间间隔添加这些波,然后产生完整的空间分布,包括腔之前,内部和之后。我们首先通过分析脉冲通过空腔的行为来确认该模型的预测,并将输出的预测与传递函数方法产生的预测进行比较。然后,我们将该技术应用于包含快光介质的腔体。由此产生的模型使我们能够可视化脉冲的行为,因为它在腔内超光传播,并通过多次反弹与自己的干扰。对于消失的群指数,在脉冲进入腔后立即形成干涉图案,输出脉冲没有时间延迟或失真。本文的结果说明了脉冲在白光腔中传播的物理机制,这是我们早先提出的实现高带宽、长延迟数据缓冲系统的方法

英文摘要:

In this paper, we study theoretically the behavior of a pulse as it propagates through an intracavity fast-light medium. The method of using a transfer function to determine a pulse after it passes through a cavity is well known. However, this approach cannot be used to determine the behavior of the pulse inside the cavity. To circumvent this constraint, we use an approach that starts by finding a self-consistent solution for a monochromatic field of infinite spatial and temporal extents, and determine its amplitudes before, inside, and after the cavity. We then construct a Gaussian input pulse by adding a set of these waves, properly phased and weighted, to represent a moving pulse before the cavity. Adding these waves at various time intervals then yields the complete spatial profile everywhere, including before, inside and after the cavity. We first confirm the prediction of this model by analyzing the behavior of a pulse passing through an empty cavity, and comparing the prediction of the output with the one produced by the transfer function method. We then apply the technique to a cavity containing a fast-light medium. The resulting model allows us to visualize the behavior of the pulse as it propagates superluminally inside the cavity, and interferes with itself through multiple bounces. For a vanishing group index, an interference pattern is formed immediately after the pulse enters the cavity, with an output pulse emerging with no time delay or distortion. The results obtained here illustrates the physical mechanism behind pulse propagation through a white light cavity, a process we have proposed earlier for realizing a high bandwidth, long delay data buffering system

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。

↑