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

Link to Publications Page

Publication: Applied Physics B

Issue/Year/DOI: Applied Physics B 122:204
DOI: 10.1007/s00340-016-6466-0