Improvement of beam quality of a Nd:glass laser by coupling with a stimulated Brillouin scattering cell

Recently, lasers and amplifiers have been developed to obtain a good spatial profile of a laser beam since good beam quality has been required for the best experimental results. In this work a simple method to improve the spatial profile of a laser is proposed, where the SBS cell is placed as an additional output coupler outside the Fabry-Perot resonator. Alignment of such a laser is very simple because the reflected beam from the SBS mirror propagates along the optic axis of the laser.