27 September 2016 Exploiting a robust π/2 mode converter for high-order orbital angular momentum detection
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Abstract
Based on our constructed robust π/2 mode converter, we report a concise yet high-efficient experiment to realize the detection of high-order orbital angular momentum (OAM). The π/2 mode converter that consists of a pair of cylindrical lens is actually not new. However, our experiment show clearly its excellent robustness, as we have detected the high-order OAM numbers up to ℓ = 150 carried by standard Laguerre-Gaussian (LG) modes. The observed patterns of two-dimensional optical lattices indicate that the radial index p of LG beams can be straightforwardly inferred as well. Our demonstration has potential in both classical and quantum information applications where high OAM modes are needed.
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Wuhong Zhang, Wuhong Zhang, Jie Zhou, Jie Zhou, Lixiang Chen, Lixiang Chen, } "Exploiting a robust π/2 mode converter for high-order orbital angular momentum detection", Proc. SPIE 9950, Laser Beam Shaping XVII, 99500O (27 September 2016); doi: 10.1117/12.2237215; https://doi.org/10.1117/12.2237215
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