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Controlling light’s helicity at the source: orbital angular momentum states from lasers
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Controlling light’s helicity at the source: orbital angular momentum states from lasers
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Journal Article
Controlling light’s helicity at the source: orbital angular momentum states from lasers
2017
Overview
Optical modes that carry orbital angular momentum (OAM) are routinely produced external to the laser cavity and have found a variety of applications, thus increasing the demand for integrated solutions for their production. Yet such modes are notoriously difficult to produce from lasers due to the strict symmetry requirements for their creation, together with the need to break the degeneracy in helicity. Here, we review the progress made since 1992 in producing such twisted light modes directly at the source, from gas to solid-state lasers, bulk to integrated on-chip solutions, through to generic devices for on-demand OAM in both scalar and vector forms.
This article is part of the themed issue ‘Optical orbital angular momentum’.
Publisher
The Royal Society Publishing
Subject
