Light focusing through strongly scattering media by binary amplitude modulation

Abstract

Based on the angular spectrum method and the circular Gaussian distribution (CGD) model of scattering media, we numerically simulate light focusing through strongly scattering media. A high contrast focus in the target area is produced by using feedback optimization algorithm with binary amplitude modulation. It is possible to form the focusing with one focus or multiple foci at arbitrary areas. The influence of the number of square segments of spatial light modulation on the enhancement factor of intensity is discussed. Simulation results are found to be in good agreement with theoretical analysis for light refocusing.

Keywords

Enhancement Factor / Speckle Pattern / Spatial Light Modulation / Optic Letter / Transmission Matrix

References

[1] SebbahP. Waves and Imaging through Complex Media, 2001, Dordrecht, Kluwer

[2] LiZ-f, LiH, XieW-m, FanL-l. Optoelectronics Letters, 2010, 6: 376

[3] VellekoopI M, MoskA P. Optics Letters, 2007, 32: 2309

[4] VellekoopI M, MoskA P. Optics Communications, 2008, 281: 3071

[5] CuiM. Optics Letters, 2011, 36: 870

[6] ConkeyD B, BrownA, CaravacaA, PiestunR. Optics Express, 2012, 20: 4840

[7] WiltB A, BurnsL D, HoE T W, GhoshK K, MukamelE A, SchnitzerM J. Annual Review Neuroscience, 2009, 32: 435

[8] VellekoopI M, AegerterC M. Optics Letters, 2010, 35: 1245

[9] ČižmárT, MaziluM, DholakiaK. Nature Photonics, 2010, 4: 388

[10] DerodeA, TourinA, RosnyJ d, TanterM, YonS, FinkM. Physics Review Letters, 2003, 90: 014301

[11] LeroseyG, RosnyJ d, TourinA, FinkM. Science, 2007, 315: 1120

[12] J. C. Dainty, Laser Speckle and Related Phenomena, Berlin: Springer, 1984.

[13] XuT-h, ChaoJ, JingW-c, ZhangH-x, JiaD-g, ZhangY-m. Optoelectronics Letters, 2008, 4: 59

[14] GoodmanJ W. Statistical Optics, 2000, New York, Wiley

[15] AkbulutD, HuismanT J, PuttenE G v, VosW L, MoskA P. Optics Express, 2011, 19: 4017

[16] GoodmanJ W. Introduction to Fourier Optics, 2005, New York, McGraw-Hill

[17] BornM, WolfE. Principles of Optics: Electromagnetic Theory of Propagation, Interferance and Diffraction of Light, 1999,

[18] LiJ, PengZ, FuY. Optics Communications, 2007, 280: 243

[19] GoodmanJ W. Speckle Phenomena in Optics: Theory and Application, 2007, Colorado, Roberts Company

[20] PopoffS M, LeroseyG, FinkM, BoccaraA C, GiganS. New Journal of Physics, 2011, 13: 123021

[21] ShaoX P, WuT F, GongC M. Optical Engineering, 2014, 52: 113104

This work has been supported by the National Natural Science Foundation of China (Nos.61178015 and 11304104).