Optical memory effect from polarized Laguerre–Gaussian light beam in light-scattering turbid media

2014 ◽  
Vol 321 ◽  
pp. 116-123 ◽  
Author(s):  
Pavel Shumyatsky ◽  
Giovanni Milione ◽  
Robert R Alfano
Keyword(s):  
Light Scattering ◽  
Light Beam ◽  
Memory Effect ◽  
Optical Memory ◽  
Turbid Media

scholarly journals Fast 3D movement of a laser focusing spot behind scattering media by utilizing optical memory effect and optical conjugate planes

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Vinh Tran ◽  
Sujit K. Sahoo ◽  
Cuong Dang
Keyword(s):  
Memory Effect ◽  
Light Propagation ◽  
Optical Memory ◽  
Biological Tissues ◽  
Frame Rate ◽  
Optimization Process ◽  
Turbid Media ◽  
Scattering Media ◽  
Focus Spot ◽  
Wavefront Shaping

AbstractControlling light propagation intentionally through turbid media such as ground glass or biological tissue has been demonstrated for many useful applications. Due to random scattering effect, one of the important goals is to draw a desired shape behind turbid media with a swift and precise method. Feedback wavefront shaping method which is known as a very effective approach to focus the light, is restricted by slow optimization process for obtaining multiple spots. Here we propose a technique to implement feedback wavefront shaping with optical memory effect and optical 4f system to speedy move focus spot and form shapes in 3D space behind scattering media. Starting with only one optimization process to achieve a focusing spot, the advantages of the optical configuration and full digital control allow us to move the focus spot with high quality at the speed of SLM frame rate. Multiple focusing spots can be achieved simultaneously by combining multiple phase patterns on a single SLM. By inheriting the phase patterns in the initial focusing process, we can enhance the intensity of the focusing spot at the edge of memory effect in with 50% reduction in optimization time. With a new focusing spot, we have two partially overlapped memory effect regions, expanding our 3D scanning range. With fast wavefront shaping devices, our proposed technique could potentially find appealing applications with biological tissues.

Optical memory effect in As–Se chalcogenide glass films

1974 ◽  
Vol 45 (11) ◽  
pp. 5098-5099 ◽  
Author(s):  
W. Tokuda ◽  
T. Katoh ◽  
A. Yasumori ◽  
K. Nakamura
Keyword(s):  
Memory Effect ◽  
Chalcogenide Glass ◽  
Optical Memory ◽  
Glass Films

scholarly journals Laser light scattering in turbid media Part II: Spatial and temporal analysis of individual scattering orders via Monte Carlo simulation

2009 ◽  
Vol 17 (16) ◽  
pp. 13792 ◽  
Author(s):  
Edouard Berrocal ◽  
David L. Sedarsky ◽  
Megan E. Paciaroni ◽  
Igor V. Meglinski ◽  
Mark A. Linne
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Light Scattering ◽  
Laser Light ◽  
Temporal Analysis ◽  
Laser Light Scattering ◽  
Turbid Media ◽  
Spatial And Temporal Analysis

scholarly journals Laser light scattering in turbid media Part I: Experimental and simulated results for the spatial intensity distribution

2007 ◽  
Vol 15 (17) ◽  
pp. 10649 ◽  
Author(s):  
Edouard Berrocal ◽  
David L. Sedarsky ◽  
Megan E. Paciaroni ◽  
Igor V. Meglinski ◽  
Mark A. Linne
Keyword(s):  
Light Scattering ◽  
Intensity Distribution ◽  
Laser Light ◽  
Laser Light Scattering ◽  
Turbid Media ◽  
Spatial Intensity Distribution ◽  
Spatial Intensity

Optical memory effect in square multimode fibers

2021 ◽  
Vol 46 (19) ◽  
pp. 4924
Author(s):  
Antonio M. Caravaca-Aguirre ◽  
Adrien Carron ◽  
Sylvain Mezil ◽  
Irène Wang ◽  
Emmanuel Bossy
Keyword(s):  
Memory Effect ◽  
Optical Memory ◽  
Multimode Fibers

A new memory effect: smectic liquid crystalline memory having both conductive and optical memory

2008 ◽  
Vol 35 (6) ◽  
pp. 675-679
Author(s):  
Yuichiro Haramoto ◽  
Kohki Hiroshima ◽  
Takamasa Kato
Keyword(s):  
Memory Effect ◽  
Liquid Crystalline ◽  
Optical Memory

scholarly journals Optical Characterization of Homogeneous and Heterogeneous Intralipid-Based Samples

2020 ◽  
Vol 10 (18) ◽  
pp. 6234
Author(s):  
Ines Delfino ◽  
Maria Lepore ◽  
Rosario Esposito
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Scattered Light ◽  
Industrial Applications ◽  
Point Of View ◽  
Turbid Media ◽  
Time Resolved ◽  
Propagation Of Light ◽  
First Time

Different scattering processes take place when photons propagate inside turbid media. Many powerful experimental techniques exploiting these processes have been developed and applied over the years in a large variety of situations from fundamental and applied research to industrial applications. In the present paper, we intend to take advantage of Static Light Scattering (SLS), Dynamic Light Scattering (DLS), and Time-Resolved Transmittance (TRT) for investigating all the different scattering regimes by using scattering suspensions in a very large range of scatterer concentrations. The suspensions were prepared using Intralipid 20%, a material largely employed in studies of the optical properties of turbid media, with concentrations from 10−5% to 50%. By the analysis of the angular and temporal dependence of the scattered light, a more reliable description of the scattering process occurring in these samples can be obtained. TRT measurements allowed us to obtain information on the reduced scattering coefficient, an important parameter largely used in the description of the optical properties of turbid media. TRT was also employed for the detection of inclusions embedded in Intralipid suspensions, by using a properly designed data analysis. The present study allowed us to better elucidate the dependence of scattering properties of Intralipid suspensions in a very large concentration range and the occurrence of the different scattering processes involved in the propagation of light in turbid media for the first time to our knowledge. In so doing, the complementary contribution of SLS, DLS, and TRT in the characterization of turbid media from an optical and structural point of view is strongly evidenced.

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