光学
高斯光束
叠加原理
梁(结构)
光学镊子
强度(物理)
平方米
材料科学
激光束质量
光功率
物理
镜头(地质)
光束直径
数值孔径
光圈(计算机存储器)
高斯分布
激光器
激光束
波长
量子力学
声学
标识
DOI:10.1016/j.optcom.2020.125809
摘要
The hollow Gaussian beam can be generated by thermal lens effect for a Gaussian beam propagating through a medium with finite optical absorption. The new model of hollow Gaussian beam (HGB) is proposed by the effective thermal focal length at steady state. The transformation between the HGB and quasi-hollow beam is achieved by tunable input power. Based on the experimental and numerical analysis, the quasi-hollow beam is the superposition of various orders of single HGB. Besides, the property of optical limiting of hollow or quasi-hollow beam is investigated. It shows that the output intensity linearly increases as the input intensity increases when input intensity is below 34 W/cm2, while changes of intensity through the aperture is very low when input intensity is above 34 W/cm2 so that the optical limiting is achieved. Our theoretical and experimental results may have potential applications in optical tweezers, optical limiting, low power all-optical devices and related fields.
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