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

Author(s):

Lipeng Wan and Ziyang Chen and Huiling Huang and Jixiong Pu

Abstract:

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