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- W1973657467 abstract "Based on the generalized Huygens–Fresnel diffraction integral, a closed-form propagation equation related to sine-Gaussian beams through a cylindrical lens and a focusing lens is derived and illustrated with numerical methods. It is found that a sine-Gaussian beam through such a system may be converted into a dark hollow beam (DHB) with topological charge index one and its bright enclosure is approximately an elongated ellipse with very high ellipticity. Moreover, the parameter values at which the DHBs have perfect intensity patterns are designed. The optimal relative orientation between the dislocation line of the input sine-Gaussian beam and the axial orientation of the cylindrical lens is specified. And the ellipticity of the elliptical DHBs is mainly defined by the focal length of the cylindrical lens and the Fresnel number of the optical system." @default.
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- W1973657467 date "2013-12-01" @default.
- W1973657467 modified "2023-09-24" @default.
- W1973657467 title "Generation of dark hollow beam by focusing a sine-Gaussian beam using a cylindrical lens and a focusing lens" @default.
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- W1973657467 doi "https://doi.org/10.1016/j.optlastec.2013.05.012" @default.
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