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High Efficient Tunable Fractal Axicon Based on LCoS |
| WANG Xin;DAI Hai-Tao;Xu Ke-Shu |
| State Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433 |
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| Cite this article: |
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WANG Xin, DAI Hai-Tao, Xu Ke-Shu 2008 Chin. Phys. Lett. 25 985-988 |
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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 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.
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| Keywords:
42.79.Hp
42.79.Ls
42.30.Kq
42.25.Fx
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Received: 01 January 1900
Published: 27 February 2008
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| PACS: |
42.79.Hp
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(Optical processors, correlators, and modulators)
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42.79.Ls
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(Scanners, image intensifiers, and image converters)
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42.30.Kq
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(Fourier optics)
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42.25.Fx
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(Diffraction and scattering)
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[9] Dai H T, Xu K S and Liu Y J 2004 Opt. Commun. 238 269 |
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