Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions

Yuanjie Yang; Michael Mazilu; Kishan Dholakia

doi:10.1364/OL.37.004949

Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions

Yuanjie Yang, Michael Mazilu^*, Kishan Dholakia

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

By analysis of the far-field cross-correlation function (CCF) of partially coherent optical beams, we demonstrate an implicit rule that the number of ring dislocations (dark zones) of the far-field CCF is equal to the original topological charge of an optical vortex rendered partially coherent. This novel link between an optical vortex and its correlation singularity may offer an efficient method for measuring the orbital angular momentum of partially coherent optical vortices in fields such as astrophysics and astronomy, as well as atmospheric laser communication.

Original language	English
Pages (from-to)	4949-4951
Number of pages	3
Journal	Optics Letters
Volume	37
Issue number	23
DOIs	https://doi.org/10.1364/OL.37.004949
Publication status	Published - 1 Dec 2012

Keywords

Space
Vortex beam
Triangular aperture
Topological charge

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10.1364/OL.37.004949

ol-37-23-4949
© 2012 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-37-23-4949. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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Cite this

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title = "Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions",

abstract = "By analysis of the far-field cross-correlation function (CCF) of partially coherent optical beams, we demonstrate an implicit rule that the number of ring dislocations (dark zones) of the far-field CCF is equal to the original topological charge of an optical vortex rendered partially coherent. This novel link between an optical vortex and its correlation singularity may offer an efficient method for measuring the orbital angular momentum of partially coherent optical vortices in fields such as astrophysics and astronomy, as well as atmospheric laser communication.",

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author = "Yuanjie Yang and Michael Mazilu and Kishan Dholakia",

note = "This work is supported by UK EPSRC",

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T1 - Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions

AU - Yang, Yuanjie

AU - Mazilu, Michael

AU - Dholakia, Kishan

N1 - This work is supported by UK EPSRC

PY - 2012/12/1

Y1 - 2012/12/1

N2 - By analysis of the far-field cross-correlation function (CCF) of partially coherent optical beams, we demonstrate an implicit rule that the number of ring dislocations (dark zones) of the far-field CCF is equal to the original topological charge of an optical vortex rendered partially coherent. This novel link between an optical vortex and its correlation singularity may offer an efficient method for measuring the orbital angular momentum of partially coherent optical vortices in fields such as astrophysics and astronomy, as well as atmospheric laser communication.

AB - By analysis of the far-field cross-correlation function (CCF) of partially coherent optical beams, we demonstrate an implicit rule that the number of ring dislocations (dark zones) of the far-field CCF is equal to the original topological charge of an optical vortex rendered partially coherent. This novel link between an optical vortex and its correlation singularity may offer an efficient method for measuring the orbital angular momentum of partially coherent optical vortices in fields such as astrophysics and astronomy, as well as atmospheric laser communication.

KW - Space

KW - Vortex beam

KW - Triangular aperture

KW - Topological charge

UR - http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-23-4949

U2 - 10.1364/OL.37.004949

DO - 10.1364/OL.37.004949

M3 - Article

SN - 0146-9592

VL - 37

SP - 4949

EP - 4951

JO - Optics Letters

JF - Optics Letters

IS - 23

ER -

Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions

Abstract

Keywords

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Royal Society Wolfson Merit Award: Royal Society Wolfson Merit Award

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Measuring the orbital angular momentum of partially coherent optical vortices through singularities in their cross-spectral density functions

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Royal Society Wolfson Merit Award: Royal Society Wolfson Merit Award

Cite this