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 (SiO2 and Ta2O5) to enhance polarization selectivity. By combining two prisms we obtained a conical Brewster prism without beam divergence owing to refraction. A radially polarized TEM<sub>01</sub>*(R−TEM<sub>01</sub>*) mode laser beam was demonstrated when this prism was used inside a Nd:YAG laser cavity.
© 2005 Optical Society of America
Yuichi Kozawa and Shunichi Sato, "Generation of a radially polarized laser beam by use of a conical Brewster prism," Opt. Lett. 30, 3063-3065 (2005)