Abstract

To generate a radially polarized laser beam we designed and fabricated a new Brewster optical element that consists of convex and concave conical prisms. The lateral surface of the convex conical prism was coated with a dielectric multilayer (${\mathrm{SiO}}_2$ and ${\mathrm{Ta}}_2{\mathrm{O}}_5$) to enhance polarization selectivity. By combining two prisms we obtained a conical Brewster prism without beam divergence owing to refraction. A radially polarized ${{\mathrm{TEM}}_{01}}^{*}(\mathrm{R}-{{\mathrm{TEM}}_{01}}^{*})$ mode laser beam was demonstrated when this prism was used inside a $\mathrm{Nd}:\mathrm{YAG}$ laser cavity.

© 2005 Optical Society of America

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