Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes
L. AllenHuygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The NetherlandsMarco W. BeijersbergenHuygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The NetherlandsR. J. C. SpreeuwHuygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The NetherlandsJ. P. WoerdmanHuygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
1992en
ABI
Abstract
Laser light with a Laguerre-Gaussian amplitude distribution is found to have a well-defined orbital angular momentum. An astigmatic optical system may be used to transform a high-order Laguerre-Gaussian mode into a high-order Hermite-Gaussian mode reversibly. An experiment is proposed to measure the mechanical torque induced by the transfer of orbital angular momentum associated with such a transformation.
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