Focusing light into desired patterns through turbid media by feedback-based wavefront shaping


Lipeng Wan and Ziyang Chen and Huiling Huang and Jixiong Pu


“We demonstrate that the focusing of light into desired patterns through turbid media can be realized using feedback-based wavefront shaping. Three desired focused patterns—a triangle, a circle, and a rectangle—are used as examples to study this ability. During the process of modulating scattered light, the Pearson’s correlation coefficient is introduced as a feedback signal. It is found that the speckle field formed by the turbid media gradually transforms into the desired pattern through a process of modulation of the input beam wave front. The proposed approach has potential applications in biomedical treatment and laser material processing.”

Link to Publications Page

Publication: Applied Physics B
Issue/Year: Applied Physics, B 122, 204 (2016)
DOI: 10.1007/s00340-016-6466-0