Focusing light by wavefront shaping through disorder and nonlinearity

Hadas Frostig, Eran Small, Anat Daniel, Patric Oulevey, Stanislav Derevyanko, Yaron Silberberg

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Wavefront shaping is a powerful technique that can be used to focus light through scattering media, which can be important for imaging through scattering samples such as tissue. This method is based on the assumption that the field at the output of the medium is a linear superposition of the modes traveling through different paths in the medium. However, when the scattering medium also exhibits nonlinearity, as may occur in multiphoton microscopy, this assumption is violated and the applicability of wavefront shaping becomes unclear. Here, using a simple model system with a scattering layer followed by a nonlinear layer, we show that with adaptive optimization of the wavefront, light can still be controlled and focused through a scattering medium in the presence of nonlinearity. Notably, we find that moderate positive nonlinearity can serve to significantly increase the focused fraction of power, whereas negative nonlinearity reduces it.

Original languageEnglish
Pages (from-to)1073-1079
Number of pages7
JournalOptica
Volume4
Issue number9
DOIs
StatePublished - 20 Sep 2017

Keywords

  • Nonlinear optics
  • Speckle
  • Turbid media
  • Wavefront encoding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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