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Efficient extracavity generation of radially and azimuthally polarized beams

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Abstract

We demonstrate an efficient transformation of a linearly polarized Gaussian beam to a radially or an azimuthally polarized doughnut (0,1)* Laguerre–Gaussian beam of high purity. We use a spatially variable retardation plate, composed of eight sectors of a λ2 retardation plate, to transform a linear polarization distribution to radial/azimuthal distribution. We transformed an Nd:YAG Gaussian beam with M2=1.3 to a radially and azimuthally polarized (0,1)* Laguerre–Gaussian beams with M2=2.5 and degree of radial/azimuthal polarization of 96–98%.

© 2007 Optical Society of America

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