摘要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 the axicon 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.
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 the axicon 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.
WANG Xin;DAI Hai-Tao;Xu Ke-Shu. High Efficient Tunable Fractal Axicon Based on LCoS[J]. 中国物理快报, 2008, 25(3): 985-988.
WANG Xin, DAI Hai-Tao, Xu Ke-Shu. High Efficient Tunable Fractal Axicon Based on LCoS. Chin. Phys. Lett., 2008, 25(3): 985-988.
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2008, Vol. 25 
