Abstract
This paper describes an integer multiplier for the orbital angular momentum (OAM) of light through the parallel implementation of multiple circular-sector transformations, whereby the cross-sectional circular shape of the OAM mode is geometrically transformed to the circular-sector shape. Experiments show that the conversion accuracy of both OAM doubler and tripler formulations is significantly better than that of the previous method. This is because the proposed method uses a simple implementation with a single spatial light modulator. The proposed method has strong potential for the spatial mode manipulation of OAM and other useful spatial modes.
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