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中文摘要：
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。
英文摘要：
The experimental investigation on generation of fractional Bessel beams by focusing the fractional vortex beams with an axicon is carried out. It is shown that when the fractional vortex beams are focused by the axicon, the transverse intensity distribution of the fractional Bessel beams possesses characteristics of high order non-diffracting Bessel beams. Within the maximum collimating distance behind the axicon, the focused light spots seem unchanged during propagation. The fractional Bessel beams have a very good characteristics of non-diffraction. Moreover, the influence of cone angle of the axicon on the fractional Bessel beams is investigated. The experimental results show that the bigger the cone angle of axicon is, the smaller the central hollow of the transverse intensity distribution is
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Spectral and polarization properties of stochastic electromagnetic beams propagating in gain or abso
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