No abstract

A laser beam-shaping system was established with a deformable mirror (37 element) and a Shack±Hartmann wave-front sensor. The deformable mirror changes its surface to modulate the beam's phase distribution and the Shack±Hartmann sensor measures the laser wave-front in real-time. By using these components combined with the theories of wave-front aberration and di raction, a laser beam with a circular Gaussian pro®le can be transformed to uniform rectangular irradiation at the focal plane. By the results of the experiment, the limiting factors of the optical system for reshaping uniform pro®les are discussed.