Two-dimensional beam shaping for beams with large aspect ratio and variable divergence angle

To achieve two-dimensional beam shaping, adapt to the parameter variation of divergence angle and beam size, improve beam quality, the article presents a two-dimensional beam shaping method for beams with large aspect ratio and variable divergence angle. Using beam transform matrix to analyze light path, adopting cylindrical lens and spherical lens for two-dimensional beam shaping, and adjusting lens positions and intervals dynamically, the method realizes separate regulation in dimensions x and y of beam size and divergence angle, corrects the lower order aberrations in real time, thus outputs beam of predetermined shape. Experimental study shows that the method has the advantages of simple structure, small comprehensive aberration and large adjustable range.