Measuring Topological Charges of Optical Vortices with Multi-Singularity Using a Cylindrical Lens
We present a simple method to measure the topological charges of optical vortices with multiple singularities. Using a cylindrical lens, a vortex beam can decay into a light field distribution with multiple separated dark holes, whose number just equals the topological charge of the input beam. This...
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| Veröffentlicht in: | Chinese physics letters 2015-02, Vol.32 (2), p.56-59 |
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| container_title | Chinese physics letters |
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| creator | Peng, Yu Gan, Xue-Tao Ju, Pei Wang, Ya-Dong Zhao, Jian-Lin |
| description | We present a simple method to measure the topological charges of optical vortices with multiple singularities. Using a cylindrical lens, a vortex beam can decay into a light field distribution with multiple separated dark holes, whose number just equals the topological charge of the input beam. This conclusion is then verified via experiments and numerical simulations of the propagation of vortex beams with multiple singulaxities. This method is also reliable to measure the topological charges of broadband vortex beams with different distributions of singularities, which does not resort to multiple beam interferometrie experiments. |
| doi_str_mv | 10.1088/0256-307X/32/2/024201 |
| format | Article |
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| ispartof | Chinese physics letters, 2015-02, Vol.32 (2), p.56-59 |
| issn | 0256-307X 1741-3540 |
| language | eng |
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| source | Institute of Physics Journals; Institute of Physics (IOP) Journals - HEAL-Link; Alma/SFX Local Collection |
| subjects | Beams (radiation) Electron beams Fluid flow Lenses Mathematical models Singularities Topology Vortices 光场分布 光学 奇异 拓扑荷 旋涡 柱面透镜 模拟验证 测量 |
| title | Measuring Topological Charges of Optical Vortices with Multi-Singularity Using a Cylindrical Lens |
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