Transformation of a hollow Gaussian beam into a ring-shaped beam using a phase aperture |
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Authors: | Shi-Zhuan Lu Kai-Ming YouLie-Zun Chen You-Wen WangDeng-Yu Zhang |
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Institution: | Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, Hunan Province, China |
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Abstract: | Propagation of a hollow Gaussian beam diffracted by a circular phase aperture is studied without making the paraxial approximation. The analytical expression of the intensity of the apertured hollow Gaussian beam is presented in the far field. The influences of the truncation parameter and the order of hollow Gaussian beam on the intensity distributions are discussed. It is shown that a circular ?-phase aperture can be used to transform a hollow Gaussian beam into a ring-shaped beam in the far field with the appropriate parameters. |
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Keywords: | 42 25 Bs 42 25 Fx 42 30 Kq |
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