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Vortex sensing diffraction gratings
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DOI：10.1364/OL.34.002927.png)
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We demonstrate a specially designed vortex sensing diffraction grating that generates multiple vortex patterns in the different diffracted orders. When this grating is illuminated with a separate vortex beam, the sign and order of the topological charge of the incident beam can be easily detected. Experimental results are shown for a variety of vortex beams including fractional values of the topological charge, and where both the diffraction grating and incident vortex illumination beam are generated by two different liquid crystal displays (LCDs). The programmability offered by the LCDs offers extremely convenient flexibility. (C) 2009 Optical Society of America
Keyword:
COMPUTER-GENERATED HOLOGRAMS
ORBITAL ANGULAR-MOMENTUM
OPTICAL VORTICES
PHASE SINGULARITY
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3.3
论文数:
4.0W
被引数:
7.6W
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