Generation of radially polarized beams by intracavity waveguide technique

A new technique of radially polarized laser beams generation by suppressing the main mode of a gas laser in the case of a Brewster prism coupler placed in the laser cavity as a source of controlled intracavity losses and as a laser beam output coupler is proposed. The suppressing of the main intracavity mode leads to domination of the transverse electromagnetic (1,0) mode. Its electric field distribution has mirror symmetry for intensity and polarization. The obtained radially polarized beam is the result of the superposition of the outputted by the prism input face beam with one been rotated 90 degrees with mirrors.