scholarly journals Modulating quantum fluctuations of scattered light in disordered media via wavefront shaping

2019 ◽  
Vol 36 (12) ◽  
pp. 3290
Author(s):  
Dong Li ◽  
Yao Yao
Keyword(s):  
Scattered Light ◽  
Quantum Fluctuations ◽  
Disordered Media ◽  
Wavefront Shaping

scholarly journals A comparative study of optimization algorithms for wavefront shaping

2019 ◽  
Vol 12 (04) ◽  
pp. 1942002 ◽  
Author(s):  
Zahra Fayyaz ◽  
Nafiseh Mohammadian ◽  
M. Reza Rahimi Tabar ◽  
Rayyan Manwar ◽  
Kamran Avanaki
Keyword(s):  
Comparative Study ◽  
Spatial Light Modulator ◽  
Scattered Light ◽  
Optimization Algorithms ◽  
Estimation Method ◽  
Noise Levels ◽  
Light Modulator ◽  
Matrix Estimation ◽  
Phase Map ◽  
Wavefront Shaping

By manipulating the phase map of a wavefront of light using a spatial light modulator, the scattered light can be sharply focused on a specific target. Several iterative optimization algorithms for obtaining the optimum phase map have been explored. However, there has not been a comparative study on the performance of these algorithms. In this paper, six optimization algorithms for wavefront shaping including continuous sequential, partitioning algorithm, transmission matrix estimation method, particle swarm optimization, genetic algorithm (GA), and simulated annealing (SA) are discussed and compared based on their efficiency when introduced with various measurement noise levels.

scholarly journals Wavefront shaping of a Bessel light field enhances light sheet microscopy with scattered light

2014 ◽  
Author(s):  
J. Nylk ◽  
C. Mitchell ◽  
T. Vettenburg ◽  
F. J. Gunn-Moore ◽  
K. Dholakia
Keyword(s):  
Light Field ◽  
Scattered Light ◽  
Light Sheet ◽  
Light Sheet Microscopy ◽  
Wavefront Shaping

scholarly journals Polarization control of multiply scattered light through random media by wavefront shaping

2012 ◽  
Vol 37 (22) ◽  
pp. 4663 ◽  
Author(s):  
Yefeng Guan ◽  
Ori Katz ◽  
Eran Small ◽  
Jianying Zhou ◽  
Yaron Silberberg
Keyword(s):  
Random Media ◽  
Scattered Light ◽  
Polarization Control ◽  
Wavefront Shaping

scholarly journals Time-reversed optical focusing through scattering media by digital full phase and amplitude recovery using a single phase-only SLM

2015 ◽  
Vol 08 (02) ◽  
pp. 1550007 ◽  
Author(s):  
Qiang Yang ◽  
Xinzhu Sang ◽  
Daxiong Xu
Keyword(s):  
Single Phase ◽  
Scattered Light ◽  
Incident Light ◽  
Scattering Media ◽  
Ballistic Regime ◽  
Light Modulator ◽  
Speckle Field ◽  
Biomedical Optical Imaging ◽  
Wavefront Shaping ◽  
Optical Focusing

Focusing light though scattering media beyond the ballistic regime is a challenging task in biomedical optical imaging. This challenge can be overcome by wavefront shaping technique, in which a time-reversed (TR) wavefront of scattered light is generated to suppress the scattering. In previous TR optical focusing experiments, a phase-only spatial light modulator (SLM) has been typically used to control the wavefront of incident light. Unfortunately, although the phase information is reconstructed by the phase-only SLM, the amplitude information is lost, resulting in decreased peak-to-background ratio (PBR) of optical focusing in the TR wavefront reconstruction. A new method of TR optical focusing through scattering media is proposed here, which numerically reconstructs the full phase and amplitude of a simulated scattered light field by using a single phase-only SLM. Simulation results and the proposed optical setup show that the time-reversal of a fully developed speckle field can be digitally implemented with both phase and amplitude recovery, affording a way to improve the performance of light focusing through scattering media.

scholarly journals Wavefront Shaping Concepts for Application in Optical Coherence Tomography—A Review

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7044
Author(s):  
Jonas Kanngiesser ◽  
Bernhard Roth
Keyword(s):  
Optical Coherence Tomography ◽  
Scattered Light ◽  
Three Dimensional ◽  
Medical Diagnostics ◽  
Optical Coherence ◽  
Scattering Media ◽  
Destructive Testing ◽  
Non Invasive ◽  
Wavefront Shaping ◽  
Micrometer Scale

Optical coherence tomography (OCT) enables three-dimensional imaging with resolution on the micrometer scale. The technique relies on the time-of-flight gated detection of light scattered from a sample and has received enormous interest in applications as versatile as non-destructive testing, metrology and non-invasive medical diagnostics. However, in strongly scattering media such as biological tissue, the penetration depth and imaging resolution are limited. Combining OCT imaging with wavefront shaping approaches significantly leverages the capabilities of the technique by controlling the scattered light field through manipulation of the field incident on the sample. This article reviews the main concepts developed so far in the field and discusses the latest results achieved with a focus on signal enhancement and imaging.

scholarly journals Enhanced deep detection of Raman scattered light by wavefront shaping

2018 ◽  
Vol 26 (26) ◽  
pp. 33565 ◽  
Author(s):  
Alba M. Paniagua-Diaz ◽  
Adrian Ghita ◽  
Tom Vettenburg ◽  
Nick Stone ◽  
Jacopo Bertolotti
Keyword(s):  
Scattered Light ◽  
Wavefront Shaping

scholarly journals Acousto optic imaging beyond the acoustic diffraction limit using speckle decorrelation

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Daniel Doktofsky ◽  
Moriya Rosenfeld ◽  
Ori Katz
Keyword(s):  
Scattered Light ◽  
Super Resolution ◽  
Diffraction Limit ◽  
Resolution Limit ◽  
Contrast Imaging ◽  
Optical Contrast ◽  
Ultrasound Modulation ◽  
Wavefront Shaping ◽  
Acoustic Diffraction ◽  
Natural Dynamics

AbstractAcousto-optic imaging (AOI) enables optical-contrast imaging deep inside scattering samples via localized ultrasound modulation of scattered light. However, the resolution in AOI is inherently limited by the ultrasound focus size, prohibiting microscopic investigations. In recent years advances in the field of digital wavefront-shaping allowed the development of novel approaches for overcoming AOI’s acoustic resolution limit. However, these approaches require thousands of wavefront measurements within the sample speckle decorrelation time, limiting their application to static samples. Here, we show that it is possible to surpass the acoustic resolution-limit with a conventional AOI system by exploiting the natural dynamics of speckle decorrelations rather than trying to overcome them. We achieve this by adapting the principles of super-resolution optical fluctuations imaging (SOFI) to AOI. We show that naturally fluctuating optical speckle grains can serve in AOI as the analogues of blinking fluorophores in SOFI, enabling super-resolution by statistical analysis of fluctuating acousto-optic signals.

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