Transfer of orbital angular momentum from a stressed fiber-optic waveguide to a light beam

David McGloin; Neil B. Simpson; Miles J. Padgett

doi:10.1364/AO.37.000469

Transfer of orbital angular momentum from a stressed fiber-optic waveguide to a light beam

David McGloin, Neil B. Simpson, Miles J. Padgett

Physics

University of St Andrews

Research output: Contribution to journal › Article › peer-review

111 Citations (Scopus)

Abstract

A stressed fiber-optic waveguide is used to impart orbital angular momentum to a Hermite-Gaussian (HG₁₀) laser mode. The transmitted beam has an annular intensity profile and a well-defined azimuthal phase dependence. We confirm the phase structure of the beam by observing the interference pattern produced between it and a plane wave. The transfer of the angular momentum to the light occurs because of a difference in phase velocity within the fiber for two orthogonal modes that comprise the input beam. This represents a mechanism for the transfer of orbital angular momentum to a light beam that has not hitherto been identified.

Original language	English
Pages (from-to)	469-472
Number of pages	4
Journal	Applied Optics
Volume	37
Issue number	3
DOIs	https://doi.org/10.1364/AO.37.000469
Publication status	Published - 20 Jan 1998

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Transfer of orbital angular momentum from a stressed fiber-optic waveguide to a light beam

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