Using analytical calculations and wave-optic code simulations, we study the problem of shaping the spatial distribution of laser beam intensity in the far field by varying the near-field phase. We discuss possibilities of using adaptive-optic devices to form the near-field phase distribution to reach the desirable far-field intensity profile. As an example, we show how a doughnut-like far-field intensity could be achieved by introducing a specific phase aberration into the laser beam through a deformable mirror. Diffraction limitations on the far-field beam shaping are estimated.

Date Published: 21 August 2003
PDF: 4 pages
Proc. SPIE 5087, Laser Systems Technology, (21 August 2003); doi: 10.1117/12.487264

Published in SPIE Proceedings Vol. 5087:
Laser Systems Technology
William E. Thompson; Paul H. Merritt, Editor(s)