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Proceedings Paper

Exploiting scattering for single-shot measurement of the orbital angular momentum spectrum of light fields
Author(s): Lei Gong; Qian Zhao; Hao Zhang; Xinyao Hu; Yinmei Li
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Paper 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.

Paper Details

Date Published: 24 April 2018
PDF: 3 pages
Proc. SPIE 10712, Optical Manipulation Conference, 107121F (24 April 2018); doi: 10.1117/12.2318882
Show Author Affiliations
Lei Gong, Univ. of Science and Technology of China (China)
Qian Zhao, Univ. of Science and Technology of China (China)
Hao Zhang, Univ. of Science and Technology of China (China)
Xinyao Hu, Univ. of Science and Technology of China (China)
Yinmei Li, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 10712:
Optical Manipulation Conference
Takashige Omatsu; Hajime Ishihara; Keiji Sasaki, Editor(s)

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