红外与激光工程, 2018, 47 (6): 0618003, 网络出版: 2018-09-08
Pearcey光束的形成及其聚焦特性
Formation and focusing characteristics of Pearcey beam
Pearcey光束 自聚焦特性 抛物缝孔径 形式不变光束 Pearcey beam self-focusing characteristics parabolic slit aperture form-invariant beam
摘要
设计一种简单的光学元件——抛物缝孔径获得Pearcey光束, 基于空间域中的广义惠更斯-菲涅耳衍射积分, 导出该系统的Pearcey光束表达式。数值模拟和实验验证了Pearcey光束的产生。同时研究了Pearcey光束的自聚焦特性, 讨论了抛物缝孔径焦准距对聚焦光斑的影响。实验所得自聚焦光斑大小与数值模拟相符, 研究结果对Pearcey光束用于光学囚禁提供理论和实验依据。
Abstract
Pearcey beam was obtained by designing a simple optical element-parabolic slit aperture. Based on the generalized Huygens-Fresnel diffraction integral in the spatial domain, the Pearcey beam expression of the system was derived. Numerical simulations and experiments verify the generation of Pearcey beams. At the same time, the self-focusing characteristics of the Pearcey beam were studied, and the effect of the focal distance of parabolic silt aperture on the focal spot was discussed. The experimental results show that the size of the self-focucal spot was consistent with the numerical simulation. The results provide theoretical and experimental basis for the Pearcey beam for optical trapping.
胡汉青, 吴逢铁, 胡润, 杨艳飞, 朱清智. Pearcey光束的形成及其聚焦特性[J]. 红外与激光工程, 2018, 47(6): 0618003. Hu Hanqing, Wu Fengtie, Hu Run, Yang Yanfei, Zhu Qingzhi. Formation and focusing characteristics of Pearcey beam[J]. Infrared and Laser Engineering, 2018, 47(6): 0618003.