Mcgloin, D., Simpson, N., and Padgett, M. (1998) Transfer Of Orbital Angular Momentum From A Stressed Fiber-Optic Waveguide To A Light Beam. Applied Optics, 37(3), pp. 469-472. (doi:10.1364/AO.37.000469)
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A stressed fiber-optic waveguide is used to impart orbital angular momentum to a Hermite-Gaussian (HG(10)) 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.
|Glasgow Author(s) Enlighten ID:||Padgett, Professor Miles|
|Authors:||Mcgloin, D., Simpson, N., and Padgett, M.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Applied Optics|
|Journal Abbr.:||Appl. Optics|