From Event: SPIE Optical Engineering + Applications, 2016
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.
Wuhong Zhang, Jie Zhou, and Lixiang Chen, "Exploiting a robust [pi]/2 mode converter for high-order orbital angular momentum detection," Proc. SPIE 9950, Laser Beam Shaping XVII, 99500O (Presented at SPIE Optical Engineering + Applications: August 30, 2016; Published: 27 September 2016); https://doi.org/10.1117/12.2237215.
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