Thin layer dye laser amplifier

A simple method to amplify laser radiation is proposed: the divergence is nearly diffraction limited and the intensity distribution profile is gaussian (independent of the spatial parameters of the input signal). The amplification of the laser radiation is achieved using the quasi-waveguide laser of a solution of rhodamin 6G with a concentration of 10^-2 mol/$\text{l}$. A hundred fold intensity amplification with a divergence of 6 × 10^-4 rad is achieved, the latter being only 1.4 times more than the diffraction limited divergence of the system.