Exploiting scattering for single-shot measurement of the orbital angular momentum spectrum of light fields

Lei Gong; Qian Zhao; Hao Zhang; Xinyao Hu; Yinmei Li

doi:10.1117/12.2318882

24 April 2018 Exploiting scattering for single-shot measurement of the orbital angular momentum spectrum of light fields

Lei Gong, Qian Zhao, Hao Zhang, Xinyao Hu, Yinmei Li

Author Affiliations +

Proceedings Volume 10712, Optical Manipulation Conference; 107121F (2018) https://doi.org/10.1117/12.2318882
Event: SPIE Structured Light, 2018, Yokohama, Japan

Abstract

Coherent measurement of orbital angular momentum (OAM) spectrum of light fields plays a key role in many important applications, such as OAM-based multiplexing in optical communications. The existing methods for measuring the OAM spectrum by spatially separating OAM components or interferometric technique suffer from poor efficiency and interferometric stability requirements. Here, we propose a novel technique to measure the OAM spectrum of light fields in a single shot manner by exploiting a scattering optical element. Our technique enables to directly extract the OAM spectrum from a recorded single-shot speckle pattern using algorithms based on the speckle-correlation scattering matrix and spatial mode decomposition method. As a proof of concept, we built a robust measurement system based on a fast digital micromirror device to demonstrate the feasibility of the proposed technique.

Citation Download Citation

Lei Gong, Qian Zhao, Hao Zhang, Xinyao Hu, and Yinmei Li "Exploiting scattering for single-shot measurement of the orbital angular momentum spectrum of light fields", Proc. SPIE 10712, Optical Manipulation Conference, 107121F (24 April 2018); https://doi.org/10.1117/12.2318882

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