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We analyze two methods for obtaining a smooth evanescent-wave intensity profile on the inner surface of a multimode hollow optical fiber to be used as a waveguide for neutral atoms. The first method is based on the selective excitation of fiber modes with a laser beam possessing orbital angular momentum, of which Laguerre-Gaussian beams are considered as an example. The second method makes use of...
We propose a novel method to efficiently produce light beams with radial, azimuthal, and hybrid polarization, through a few-mode fiber excited by a Laguerre-Gaussian beam. With different input polarization we can selectively excite different combinations of modes from the LP 11 group. We propose to show how to transform the output beam into a cylindrical vector beam in free-space through...
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