Optical fibers as beam shapers: from Gaussian beams to optical vortices | Zendy

R. S. Rodrigues Ribeiro | Zendy; Pabitra Dahal | Zendy; Ariel Guerreiro | Zendy; P. A. S. Jorge | Zendy; Jaime Viegas | Zendy

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Optical fibers as beam shapers: from Gaussian beams to optical vortices

Author(s) -

R. S. Rodrigues Ribeiro,

Pabitra Dahal,

Ariel Guerreiro,

P. A. S. Jorge,

Jaime Viegas

Publication year - 2016

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.41.002137

Subject(s) - optics , optical vortex , gaussian beam , optical fiber , materials science , beam (structure) , angular momentum , physics , quantum mechanics

This Letter reports a new method for the generation of optical vortices using a micropatterned optical fiber tip. Here, a spiral phase plate (2π phase shift) is micromachined on the tip of an optical fiber using a focused ion beam. This is a high resolution method that allows milling the fibers with nanoscale resolution. The plate acts as a beam tailoring system, transforming the fundamental guided mode, specifically a Gaussian mode, into the Laguerre-Gaussian mode (LG 01 ), which carries orbital angular momentum. The experimental results are supported by computational simulations based on the finite-difference time-domain method.

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