Producing optical vortices through forked holographic grating: study of polarization

It is important to know what happens to initial polarization during the formation of optical vortices. We use a computer-generated forked holographic grating to produce optical vortices in the laboratory and study changes in polarization, introduced by the grating, which generates optical vortices i...

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Bibliographic Details
Published in:Journal of modern optics 2010-11, Vol.57 (20), p.2031-2038
Main Authors: Jaiswal, Virendra K., Singh, Ravindra P., Simon, R.
Format: Article
Language:English
Subjects:
Angular momentum
Diffraction
Diffraction gratings
Exact sciences and technology
Fluid flow
Fundamental areas of phenomenology (including applications)
Gratings (spectra)
Holographic optical elements
holographic gratings
Holography
Mathematical analysis
Optical properties
optical vortices
Optics
Photons
Physics
Polarization
Scattering
Studies
Vortices
Wave optics
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Summary:It is important to know what happens to initial polarization during the formation of optical vortices. We use a computer-generated forked holographic grating to produce optical vortices in the laboratory and study changes in polarization, introduced by the grating, which generates optical vortices in its diffracted orders. The Mueller matrix has been used to quantify changes in the polarization in diffracted orders containing optical vortices. Decomposition of the Mueller matrices estimates the polarizing properties, such as diattenuation, retardance and depolarization of the system. We find that the system is a non-depolarizing system. The study also shows that spin and the orbital angular momentum of photons are not coupled in this process.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2010.515748