高斯涡旋光束通过像散透镜后的相位奇异特性

发布时间：2018-05-06 07:22

本文选题：奇点光学 + 高斯涡旋光束　；参考：《光学精密工程》2017年04期

【摘要】：光场相位奇异特性研究在奇点光学研究领域中具有非常重要的意义。本文运用广义惠更斯-菲涅尔衍射积分公式推导出高斯涡旋光束通过像散透镜后的光场分布表达式,并研究了它在几何焦平面上的相位奇异特性。结果表明,高斯涡旋光束通过像散透镜后在几何焦平面上存在相位奇点,相位奇点受到透镜的像散系数、光束束腰宽度和涡旋离轴量等参数的影响。在一定条件下,几何焦平面上出现直刃型位错线或光涡旋。当像散系数为0时,光涡旋出现在y轴上。当像散系数不为0,而涡旋离轴量为0时,会出现直刃型位错线或光涡旋,且各自的位置都非常稳定。当像散系数、涡旋离轴量或束腰宽度改变时,光涡旋会发生移动。这对光学元器件的设计和涡旋光束相位奇点的控制有一定的参考价值。
[Abstract]:The study of phase singularity of light field is of great significance in the field of singularity optics. Based on the generalized Huygens-Fresnel diffraction integral formula, the optical field distribution of Gao Si vortex beam passing through an astigmatic lens is derived, and its phase singularity on the geometric focal plane is studied. The results show that there are phase singularities in the geometric focal plane after Gao Si vortex beams pass through the astigmatic lens, and the phase singularities are affected by the lens astigmatism coefficient, beam waist width and vortex off-axis. Under certain conditions, a straight edge dislocation line or a light vortex appears in the geometric focal plane. When the astigmatic coefficient is 0, the light vortex appears on the y axis. When the astigmatic coefficient is not 0 and the vortex off-axis is 0, the direct-edge dislocation line or optical vortex will appear, and their positions are very stable. When the astigmatic coefficient, vortex off-axis or beam waist width change, the optical vortex will move. It has some reference value for the design of optical components and the control of phase singularity of vortex beam.
【作者单位】：西南医科大学医学信息与工程学院;宜宾学院计算物理重点实验室;
【基金】：国家自然科学基金资助项目(No.61505075,No.61275203) 四川省教育厅自然科学基金资助项目(No.16ZA0185) 四川省科技厅支撑计划项目(No.2014SZ0001)
【分类号】：O436

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