Results 71 to 80 of about 386,620 (328)

Influence of Source Parameters and Non-Kolmogorov Turbulence on Evolution Properties of Radial Phased-Locked Partially Coherent Vortex Beam Array

Photonics, 2021
Partially coherent optical vortices have been applicated widely to reduce the influence of atmospheric turbulence, especially for free-space optical (FSO) communication.
Jiao Wang, Mingjun Wang, Sichen Lei, Zhenkun Tan, Chenbai Wang, Yuanfei Wang   +5 more
doaj   +1 more source

Incoherent interaction of light with electron-acoustic waves

, 2005
The equations governing the interaction between incoherent light and electron-acoustic waves are presented. The modulational instability properties of the system are studied, and the effect of partially coherent light is discussed.
Marklund, M., Shukla, P. K.
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Three-channel robust optical encryption via engineering coherence Stokes vector of partially coherent light

PhotoniX
Optical encryption strategies utilizing fully coherent light have been widely explored but often face challenges such as speckle noise and beam instabilities.
Yonglei Liu, Zhen Dong, Yimeng Zhu, Haiyun Wang, Fei Wang, Yahong Chen, Yangjian Cai   +6 more
doaj   +1 more source

Minimum uncertainty solutions for partially coherent fields and quantum mixed states

New Journal of Physics, 2014
A general prescription is given for finding uncertainty relations that dictate the lower bounds on the measures of spread corresponding to two different representations of a partially coherent wave field or mixed quantum state, for a given measure of ...
M Alonso, T Setälä, A T Friberg
doaj   +1 more source

Exploring the potential of random lasers for vortex beam generation and image edge enhancements [PDF]

APL Photonics
Vortex beams, characterized by their unique property of carrying orbital angular momentum, hold significant promise for applications in cutting-edge fields, such as high-capacity optical communications, information encryption, and super-resolution ...
Liming Gao, Lihailiang Xu, Wenzhi Wang, Xianlong Liu, Yangjian Cai, Yuan Wan   +5 more
doaj   +1 more source

A simple beam combination for stellar interferometry [PDF]

, 2007
In stellar interferometry, image quality improves significantly with the inclusion of more telescopes and the use of phase closure. We demonstrate, using first coherent and then partially coherent white light, a compact and efficient pair-wise ...
Gai, M, Lipson, S G, Loreggia, D, Ribak, E N   +3 more
core   +2 more sources

Real‐World Performance of CSF Kappa Free Light Chains in the 2024 McDonald Criteria

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Kappa free light chains (KFLCs) in the cerebrospinal fluid (CSF) have a similar performance to CSF‐restricted oligoclonal bands (OCB) for multiple sclerosis (MS) diagnosis. To help with implementation, we set out to resolve several remaining uncertainties: (1) performance in a real‐world cohort and the 2024 McDonald criteria; (2 ...
Maya M. Leibowitz, Ryan Cooper, Stefania Kaninia, Kathryn I. Challis, Will Greenway, Maria Bonello, Mahmoud Elbahnasawi, Deborah T. Shode, Dominika Gajdasik, Victor Iliev, Alison M. E. Whitelegg, Ian Galea   +11 more
wiley   +1 more source

Partially coherent ambiguity functions for depth-variant point spread function design [PDF]

, 2011
The ambiguity function (AF) provides a convenient way to model how a camera with a modified aperture responds to defocus. We use the AF to design an optimal aperture distribution, which creates a depth-variant point spread function (PSF) from a sparse ...
Gupta, Otkrist, Horstmeyer, Roarke William, Oh, Se Baek, Raskar, Ramesh   +3 more
core  

Cooperative atomic scattering of light from a laser with a colored noise spectrum

, 2009
The collective atomic recoil lasing is studied for an ultra-cold and collisionless atomic gas in a partially coherent pump with a colored noise. Compared to white noise, correlations in colored noise are found to be able to greatly enhance or suppress ...
Zhou, Xiaoji
core   +1 more source