用HBT型实验测量部分相干涡旋光束的模指数
Measuring mode indices of a partially coherent vortex beam with HBT type experiment
摘要：
部分相干涡旋（PCV）光束的交叉关联函数（CCF）与径向模和方位模折射率之间存在着强的关联。然而，以往的方案难以在实际系统中测量CCF，特别是在天文目标的情况下。本文从实验上证明了Hanbury Brown和Twiss效应可以用来测量原始涡旋光束的模折射率，并研究了PCV光束的空间相干宽度与CCF特性之间的关系。我们所采用的技术是相当有效和强大的，它可能是有用的自由空间通信和天文学领域的光子的轨道角动量。
英文摘要：
It is known that the cross-correlation function (CCF) of a partially coherent vortex (PCV) beam shows a robust link with the radial and azimuthal mode indices. However, the previous proposals are difficult to measure the CCF in practical system, especially in the case of astronomical objects. In this letter, we demonstrate experimentally that the Hanbury Brown and Twiss effect can be used to measure the mode indices of the original vortex beam and investigate the relationship between the spatial coherent width and the characterization of CCF of a PCV beam. The technique we exploit is quite efficient and robust, and it may be useful in the field of free space communication and astronomy which are related to the photon's orbital angular momentum.
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。
