Self-repeating properties of four-petal Gaussian vortex beams in quadratic index medium |
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Authors: | Defeng Zou Xiaohui Li Tong Chai Hairong Zheng |
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Institution: | 1. School of Physics & Information Technology, Shaanxi Normal University, Xi''an, 710119, Shaanxi, PR China;2. National Demonstration Center for Experimental X-Physics Education, Shaanxi Normal University, Xi''an, 710119, Shaanxi, PR China |
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Abstract: | In this paper, we investigate the propagation properties of four-petal Gaussian vortex (FPGV) beams propagating through the quadratic index medium, obtaining the analytical expression of FPGV beams. The effects of beam order n, topological charge m and beam waist are investigated. Results show that quadratic index medium support periodic distributions of FPGV beams. A hollow optical wall or an optical central principal maximum surrounded by symmetrical sidelobes will occur at the center of a period. At length, they will evolve into four petals structure, exactly same as the intensity distributions at source plane. |
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Keywords: | Nonlinear optics Beam Propagation Quadratic index medium |
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