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Measuring the complex orbital angular momentum spectrum of light with a mode-matching method

Zhao, Peng, Li, Shikang, Feng, Xue, Cui, Kaiyu, Liu, Fang, Zhang, Wei, Huang, Yidong·2017·Optics Letters
DOI 10.1364/ol.42.001080
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Abstract

The relative phase shift among different components in the superposition of orbital angular momentum (OAM) states contains significant information. However, with existing methods of measuring the OAM spectrum, the phase term of the spectrum coefficient is hard to obtain. In this Letter, a mode-matching method is proposed to identify the complex OAM spectrum with a Mach-Zehnder interferometer and a charge-coupled device camera. It has the potential to extend the applications of OAM in scenarios sensitive to the phase factor, for instance, in imaging and quantum manipulation. The method is experimentally demonstrated with the superposition of two or three OAM states, while the maximum deviation of the energy ratio and the relative phase shift is 8.4% and 5.5% of 2π, respectively.

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  • OAM has enabled optimal quantum cloning of OAM-encoded qubits and photonic quantum walks in OAM states, with theoretical analyses and experimental demonstrations.

    “At a fundamental level, OAM has enabled researches on optimal quantum cloning of OAM-encoded qubits [66,81] and photonic quantum walks in the orbital angular momentum states, with theoretical analyses [82,83] and experimental demonstrations [51,54,60].”

    From Photonic quantum information processing: a review (2019) · cites this paper as [82]

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Metadata

Authors
Zhao, P., Li, S., Feng, X., Cui, K., Liu, F., Zhang, W., & Huang, Y.
Venue
Optics Letters
Publisher
Optica Publishing Group
Published
2017-03-06
Volume
42
Issue
6
Pages
1080
ISSN
  • 0146-9592
  • 1539-4794
DOI
10.1364/ol.42.001080
Cited by
49
References
0
Language
en
Licence
Funders
  • National Science Foundation (NSF) (61621064, 61675112)
  • National Basic Research Program of China (2013CB328704)

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