Optical vortex beams with controllable orbital angular momentum using an optical phased array

David R. Gozzard, James T. Spollard, Paul G. Sibley, Lyle E. Roberts, Daniel A. Shaddock

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Laser beams with orbital angular momentum (OAM) have applications ranging from optical communications to quantum optics. However, the generation of OAM beams, particularly with variable OAM order, remains a challenge. We demonstrate, for the first time, the generation of OAM beams with variable OAM order using an optical phased array (OPA). OPAs are a multi-emitter solid-state device able to manipulate the distribution of optical power in the far field by controlling the relative phase of individual emitters. By applying an azimuthal phase offset to a hexagonal arrangement of laser emitters, we are able to generate OAM beams and change the OAM order easily and rapidly. This method is scalable to hundreds of emitters and GHz rate phase modulation. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Original languageEnglish
Pages (from-to)3399-3406
Number of pages8
JournalOptics Continuum
Volume3
Issue number12
DOIs
Publication statusPublished - 15 Dec 2020
Externally publishedYes

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