强激光与粒子束, 2011, 23 (6): 1479, 网络出版: 2011-07-04   

螺旋轴棱锥的光束传输特性

Beam propagation property of helical axicon
作者单位
华侨大学 信息科学与工程学院, 福建 泉州 362021
摘要
分析了螺旋轴棱锥的结构和光传输特性,基于衍射积分理论研究了发散球面波和拉盖尔-高斯光束经螺旋轴棱锥后的传输过程。研究表明,发散球面波经过螺旋轴棱锥后产生贝塞尔光束,其阶数与拓扑电荷数相同,但中心光斑(空心光斑)半径随传输距离的增加而变大;拉盖尔-高斯光束入射后同样产生贝塞尔光束,但其阶数变为拉盖尔-高斯光束和螺旋轴棱锥的拓扑电荷数之和,出射光束的拓扑电荷数与阶数相等。
Abstract
The structure and beam propagation property of helical axicon is analyzed. Based on diffraction integral theory, propagation process behind helical axiocn incident by diverging spherical wave and Laguerre-Gauss beam is studied. The result shows that Bessel beam is generated by helical axicon after diverging spherical wave incident, its beam order is equal to topological charge, but central spot (hollow spot) radius increases with propagation distance; Bessel beam is also generated by helical axicon after Laguerre-Gauss beam incident, but its beam order is equal to the sum of topological charge of Laguerre-Gauss beam and helical axicon, and the topological charge of the outgoing beam is equal to beam order itself.
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马亮, 吴逢铁, 蒲继雄. 螺旋轴棱锥的光束传输特性[J]. 强激光与粒子束, 2011, 23(6): 1479. Ma Liang, Wu Fengtie, Pu Jixiong. Beam propagation property of helical axicon[J]. High Power Laser and Particle Beams, 2011, 23(6): 1479.

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