High Efficient Tunable Fractal Axicon Based on LCoS |
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| Authors: | WANG Xin DAI Hai-Tao Xu Ke-Shu |
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| Institution: | State Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433 |
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| Abstract: | Based on the Cantor function and phase modulation, a tunable fractal axicon is formed on a liquid crystal on silicon (LCoS) with an improved generating method. It has higher focusing efficiency in higher fractal stage and approaches to 100% theoretically. The on-axis intensity keeps its fractal structure unchanged in operation of fractal stages. The tunability of theaxicon is demonstrated by tune fractal stage from 1 to 3 and focal length from 0.8m to 1m. We also provide details of theoretical analyses and experimental results. |
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| Keywords: | 42 79 Hp 42 79 Ls 42 30 Kq 42 25 Fx |
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