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

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Rodrigues Ribeiro, RSR (Author) Other; Dahal, P (Author) Other; Guerreiro, A (Author) FCUP; Jorge, PAS (Author) FCUP; Viegas, J (Author) Other

Journal

Title: Optics Letters

Vol. 41

Pages: 2137-2140

ISSN: 0146-9592

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 33 Citations

Scopus - 34 Citations

Other information

Authenticus ID: P-00K-GAV

DOI: 10.1364/ol.41.002137

Abstract (EN): This Letter reports a new method for the generation of optical vortices using a micropatterned optical fiber tip. Here, a spiral phase plate (2 pi 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. (C) 2016 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4