Abstract
We demonstrate an efficient transformation of a linearly polarized Gaussian beam to a radially or an azimuthally polarized doughnut Laguerre–Gaussian beam of high purity. We use a spatially variable retardation plate, composed of eight sectors of a retardation plate, to transform a linear polarization distribution to radial/azimuthal distribution. We transformed an Nd:YAG Gaussian beam with to a radially and azimuthally polarized Laguerre–Gaussian beams with and degree of radial/azimuthal polarization of 96–98%.
© 2007 Optical Society of America
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