2018•arXiv (Cornell University)Open access
An experimental measurement of the topological charge of orbital angular momentum beams through weak measurement
Zhu Jing, Pei Zhang, Qichang Li, Feiran Wang, Chenhui Wang, Yingnan Zhou, Jinwen Wang, Hong Gao, L. C. Kwek, Fuli Li
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Abstract
As a special experimental technique, weak measurement extracts very little information about the measured system and will not cause the measured state collapse. When coupling the orbital angular momentum (OAM) state with a well-defined pre-selected and post-selected system of a weak measurement process, there is an indirect coupling between position and topological charge (TC) of OAM state. Based on these ideas, we propose an experimental scheme that experimentally measure the TC of OAM beams from -14 to 14 through weak measurement.
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