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Cited by 2,558

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Free-space information transfer using light beams carrying orbital angular momentum

Open access
Gibson, Graham, Courtial, Johannes, Padgett, Miles J., Vasnetsov, Mikhail, Pas'ko, Valeriy, Barnett, Stephen M., Franke-Arnold, Sonja·2004·Optics Express

Abstract

We demonstrate the transfer of information encoded as orbital angular momentum (OAM) states of a light beam. The transmitter and receiver units are based on spatial light modulators, which prepare or measure a laser beam in one of eight pure OAM states. We show that the information encoded in this way is resistant to eavesdropping in the sense that any attempt to sample the beam away from its axis will be subject to an angular restriction and a lateral offset, both of which result in inherent uncertainty in the measurement. This gives an experimental insight into the effects of aperturing and misalignment of the beam on the OAM measurement and demonstrates the uncertainty relationship for OAM.

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Metadata

Authors
Gibson, G., Courtial, J., Padgett, M. J., Vasnetsov, M., Pas'ko, V., Barnett, S. M., & Franke-Arnold, S.
Venue
Optics Express
Published
2004
Volume
12
Issue
22
Pages
5448
ISSN
1094-4087 (ISSN-L)
OpenAlex
W2133791277
Cited by
2,558
References
1
FWCI
12.08
Type
journal article
Language
en
Open access
gold
Licence

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CoChat. (2026). Citation check: Free-space information transfer using light beams carrying orbital angular momentum. https://app.cochat.ai/papers/10.1364/opex.12.005448
The paper
Gibson, G., Courtial, J., Padgett, M. J., Vasnetsov, M., Pas'ko, V., Barnett, S. M., & Franke-Arnold, S. (2004). Free-space information transfer using light beams carrying orbital angular momentum. Optics Express. https://doi.org/10.1364/opex.12.005448

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