We demonstrate that when a partially coherent beam with a Gaussian intensity distribution is focused by a lens, the desired partially coherent flat-topped intensity distribution or doughnut-shaped intensity distribution at the geometrical focus can be generated by choice of appropriate form of spectral degree of coherence. We provide a novel approach to beam shaping of a partially coherent beam and offer new schemes for their potential applications such as material processing, optical therapy, and optical tweezers.
© 2004 Optical Society of America
Jixiong Pu, Shojiro Nemoto, and Xiaoyun Liu, "Beam Shaping of Focused Partially Coherent Beams by Use of the Spatial Coherence Effect," Appl. Opt. 43, 5281-5286 (2004)