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

Rita S. Rodrigues Ribeiro, Pabitra Dahal, Ariel Guerreiro, Pedro Jorge, Jaime Viegas

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


This Letter reports a new method for the generation of optical vortices using a micropatterned optical fiber tip. Here, a spiral phase plate (2? 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 (LG01 ), which carries orbital angular momentum. The experimental results are supported by computational simulations based on the finite-difference time-domain method.

Original languageBritish English
Pages (from-to)2137-2140
Number of pages4
JournalOptics Letters
Issue number10
StatePublished - 15 May 2016


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