Results 11 to 20 of about 7,330 (242)

Propagation of a Vector Cosine-Gaussian Correlated Beam Through an Active GRIN Medium

open access: yesIEEE Photonics Journal, 2017
This paper presents a convenient approach that uses the tensor method to study the propagation of a nonuniformly correlated electromagnetic Cosine-Gaussian Schell-model (ECGSM) beam through an active gradient-index (GRIN) medium.
Zitan Wang   +4 more
doaj   +1 more source

Propagation Properties of the Rectangular Multi-Gaussian Schell-Model Beams in Uniaxial Crystals Orthogonal to the Optical Axis

open access: yesIEEE Photonics Journal, 2017
A stochastic beam generated by a recently introduced source of Schell type with rectangular multi-Gaussian spectral degree of coherence is shown to posses interesting novel features on propagation in uniaxial crystals.
Yonghua Mao, Zhangrong Mei
doaj   +1 more source

Two-dimensional electron beam size measurements with x-ray heterodyne near field speckles

open access: yesPhysical Review Accelerators and Beams, 2022
In this paper we report on recent two-dimensional (2D) electron beam size measurements with a nonconventional synchrotron radiation interferometric technique based on x-ray heterodyne near field speckles (HNFS).
M. Siano   +12 more
doaj   +1 more source

Propagation of Correlation Singularities of a Partially Coherent Laguerre–Gaussian Electromagnetic Beam in a Uniaxial Crystal

open access: yesIEEE Photonics Journal, 2017
The correlation singularities of a partially coherent Laguerre–Gaussian (LG) electromagnetic beam in a uniaxial crystal is shown to possess interesting evolution behavior. The analytical formula for the cross-spectral density matrix of a partially
Yongtao Zhang, Liuzhan Pan, Yangjian Cai
doaj   +1 more source

Optical Turbulence Profile in Marine Environment with Artificial Neural Network Model

open access: yesRemote Sensing, 2022
Optical turbulence strongly affects different types of optoelectronic and adaptive optics systems. Systematic direct measurements of optical turbulence profiles [Cn2(h)] are lacking for many climates and seasons, particularly in marine environments ...
Cuicui Bi   +7 more
doaj   +1 more source

Self-Healing Properties of Partially Coherent Schell-Model Beams

open access: yesIEEE Photonics Journal, 2017
Convolution expression for partially coherent beams that are partially blocked by an opaque obstacle is derived in detail in a paraxial $ABCD$ optical system.
Gaofeng Wu, Xiaoyan Pang
doaj   +1 more source

Detecting cell death with optical coherence tomography and envelope statistics [PDF]

open access: yesJournal of Biomedical Optics, 2011
<p>Currently no standard clinical or preclinical noninvasive method exists to monitor cell death based on morphological changes at the cellular level. In our past work we have demonstrated that quantitative high frequency ultrasound imaging can detect cell death in vitro and in vivo.
Golnaz, Farhat   +3 more
openaire   +2 more sources

Correlation of Intensity Fluctuations for Scattering of a Partially Coherent Plane-Wave Pulse

open access: yesApplied Sciences, 2019
We derived analytical expressions for the correlation of intensity fluctuations of a partially coherent Gaussian Schell-model plane-wave pulse scattered by deterministic and random media.
Yongtao Zhang   +3 more
doaj   +1 more source

Statistical analysis of motion contrast in optical coherence tomography angiography [PDF]

open access: yesJournal of Biomedical Optics, 2015
11 pages, 11 ...
Cheng, Yuxuan   +6 more
openaire   +3 more sources

Spatial-Temporal Self-Focusing of Partially Coherent Pulsed Beams in Dispersive Medium

open access: yesApplied Sciences, 2019
Partially coherent pulsed beams have many applications in pulse shaping, fiber optics, ghost imaging, etc. In this paper, a novel class of partially coherent pulsed (PCP) sources with circular spatial coherence distribution and sinc temporal coherence ...
Zhiguo Zhao   +3 more
doaj   +1 more source

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