Solid-state interferometry of a pentaprism for generating cylindrical vector beam |
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Authors: | Chien-Yuan Han Ruey-Shyan Chang Hai-Fong Chen |
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Institution: | 132. Department of Electro-Optical Engineering, National United University, Miaoli, 360, Taiwan
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Abstract: | We demonstrated the generation of a cylindrical vector laser beam using a pentaprism interferometer. The solid-state interferometer was made up of a trapezoid and right-angle prism, whose hypotenuse face was implemented with a polarization beam splitter coating that split a rotated TEM01 mode beam into two orthogonal polarizations. The Ppolarized beam was reflected inside the prism twice, allowing a mode pattern without inversion; however, the Spolarized beam was reflected once resulting in mode patterns that form P-polarized beams rotated by 90°. We also held the phase shift of the two beams to zero by use of a phase shifter, thus the output of the superimposed beam was a radially polarized beam. We demonstrated the mode pattern and polarization purity of the output beam through the use of this configuration. |
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