部分相干的圆形Airy光束的突然自动聚焦特性的理论与实验研究

This program will investigate the abruptly autofocusing property of various kinds of partially coherent circular Airy beams, explore the relation between the partial coherence and the abruptly autofocusing property. We will first construct theoretical models of the partially coherent circular Airy beams and analyze their propagation characteristics, then produce the partially coherent circular Airy beam in experiment, and verify the theoretical results. The influence of the partially coherence on the abruptly autofocusing property will be investigated. By varying the degree of the partial coherence, we can modulate the intensity contrast continuously or realize special focal spot. We hope these investigations will be successfully accomplished, various kinds of partially coherent abruptly autofocusing beams can be obtained, and the special modulation methods of the abruptly autofocusing property through partial coherence can be realized. We believe that our investigation results can be applied in the fields of medical laser treatments, optical micromanipulation, and optical communications in the future.

本项目拟对部分相干的圆形Airy光束的突然自动聚焦特性进行研究，探索相干性与突然自动聚焦性质的内在物理联系。本项目首先将在理论上建立一系列部分相干的圆形Airy光束的理论模型，分析这种光束的自动聚焦性质，而后将在实验中产生这种光束，验证相关的理论结果。本项目将进一步研究相干性对突然自动聚焦特性的影响，并通过变化相干度连续地调节光束的光强增大倍数，以及实现特殊的聚焦光斑。希望该项目取得实质性进展，能够获得一系列兼具部分相干性和突然自动聚焦特性的特殊光束，并实现一种通过相干度调节光束的突然自动聚焦性质的特殊方法。这些研究结果将有助于突然自动聚焦光束在医学治疗、光操控微粒、信息传输等领域的进一步应用。

圆形Airy光束的突然自动聚焦性质在光操控微粒、激光治疗等领域有重要的应用价值。在该项目中，我们研究了部分相干的圆形Airy光束的传输性质，结果表明通过相干度可以调节光束的突然自动聚焦性质；虽然较低的相干长度会导致聚焦性质的减弱，但与相同情况下的部分相干高斯光束相比，部分相干的圆形Airy光束依然保持较高的聚焦强度。这部分研究有助于将光束的部分相干特性与突然自动聚焦特性联结在一起，产生新的应用。同时，我们也对频域调制的圆形Airy光束和圆形Airy光束在显微成像中的应用进行了研究，这些研究有助于圆形Airy光束等特殊光束在光操控微粒和显微成像领域中的应用。