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分数阶无衍射光束的实验研究

, PP. 522-527

Keywords: 物理光学,分数阶贝塞尔光束,轴棱锥聚焦,分数阶涡旋光束

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Abstract:

实验研究了轴棱锥聚焦分数阶涡旋光束获得分数阶贝塞尔光束。研究结果表明当分数阶涡旋光束通过轴棱锥聚焦后,获得的分数阶贝塞尔光束其横截面上的光强分布具有高阶无衍射贝塞尔光束的特点;在轴棱锥后的最大准直距离内,光斑的形状基本保持不变,即呈现出很好的无衍射传输特性;另外还研究了轴棱锥角度改变对分数阶贝塞尔光束的影响,实验结果表明,轴棱锥的角度越大时,横截面光强图中的中心空心越小。

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