激光与光电子学进展, 2011, 48 (9): 090501, 网络出版: 2011-07-25   

拉盖尔高斯光束经单缝后的光强分布和螺旋谱 下载: 531次

Intensity Distribution and Spiral Spectra of Laguerre-Gaussian Beam Passing through a Single-Slit
作者单位
1 中国科学院上海光学精密机械研究所高功率激光物理联合实验室, 上海 201800
2 华侨大学信息科学与工程学院, 福建 泉州 362021
摘要
根据菲涅耳衍射积分,研究了拉盖尔高斯光束经过单缝衍射后的光强分布,发现拉盖尔高斯光束经过单缝后衍射条纹会出现空心和发生弯曲,并与实验结果进行了比较。研究了拉盖尔高斯光束经过单缝后的螺旋谱,发现单缝的存在会使螺旋谱展宽。给出了拉盖尔高斯光束经过单缝衍射后的相位分布。研究结果可用于涡旋光束拓扑电荷数的测量。
Abstract
Based on the Fresnel diffraction integral, the diffraction pattern of a Laguerre-Gaussian beam passing through a single-slit has been studied. It is found that the diffraction fringes of the Laguerre-Gaussian beam will dislocate and bend which have also been demonstrated by experiments. The spiral spectra of the Laguerre-Gaussian beam passing through the single-slit are also investigated. It is shown that the spiral spectra will broaden with the existence of the single-slit. In addition, the phase distribution of the Laguerre-Gaussian beam in the diffraction plane has also been investigated. The research results can be used to measure the topological charges of vortex beams.
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高福海, 陈宝算, 蒲继雄, 朱健强. 拉盖尔高斯光束经单缝后的光强分布和螺旋谱[J]. 激光与光电子学进展, 2011, 48(9): 090501. Gao Fuhai, Chen Baosuan, Pu Jixiong, Zhu Jianqiang. Intensity Distribution and Spiral Spectra of Laguerre-Gaussian Beam Passing through a Single-Slit[J]. Laser & Optoelectronics Progress, 2011, 48(9): 090501.

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