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Continuously tunable orbital angular momentum generation controlled by input linear polarization

Sihan Wu, Yan Li, Lipeng Feng, Xinglin Zeng, Wei Li, Jifang Qiu, Yong Zuo, Xiaobin Hong, Huang Yu, R. Chen, Ian P. Giles, and Jian Wu

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Abstract

In this Letter, we theoretically and experimentally demonstrate a new method to generate tunable orbital angular momentum (OAM) by continuously changing the angle of linear polarization of the input light. We use the Fourier series of left- and right-hand projections to prove that the average OAM smoothly varied from l=−1 to l=1 with the angle of LP of input light changing from 0 to π, which is fulfilled by an electrical polarization controller.

© 2018 Optical Society of America

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