Results 41 to 50 of about 11,205 (213)

Incoherent Shock and Collapse Singularities in Non-Instantaneous Nonlinear Media

Applied Sciences, 2018
We study the dynamics of a partially incoherent optical pulse that propagates in a slowly responding nonlinear Kerr medium. We show that irrespective of the sign of the dispersion (either normal or anomalous), the incoherent pulse as a whole exhibits a ...
Gang Xu, Adrien Fusaro, Josselin Garnier, Antonio Picozzi   +3 more
doaj   +1 more source

Astronomical Imaging... Atmospheric Turbulence? Adaptive Optics! [PDF]

EAS Publications Series, 2013
This book is a collection of 19 articles which reflect the courses given at the Collège de France/Summer school “Reconstruction d'images − Applications astrophysiques“ held in Nice and Fréjus, France, from June 18 to 22, 2012. The articles presented in this volume address emerging concepts and methods that are useful in the complex process of improving
openaire   +3 more sources

Day-Time Seeing Changes at the Huairou Solar Observing Station Site

Universe
In this paper, a simple method of estimating reference optical turbulence profiles at the Huairou Solar Observing Station (HSOS) from a large meteorological dataset is used.
Artem Y. Shikhovtsev
doaj   +1 more source

Optical Turbulent Structures

, 2002
The problem of describing optical turbulent structures, arising in resonant media with high Fresnel numbers, is reviewed. The consideration is based on the probabilistic approach to pattern selection, ascribing a probability distribution of patterns to systems with multiple possible structures.
openaire   +2 more sources

Statistics of the Optical Turbulence from the Micrometeorological Measurements at the Baykal Astrophysical Observatory Site

Atmosphere, 2019
The paper focuses on the investigations of the optical turbulence structure. The distributions of the repeatability of the structure characteristic of the air refractive index are obtained. A scenario of decreasing the intensity of the optical turbulence
Artem Shikhovtsev, Pavel Kovadlo, Vladimir Lukin, Victor Nosov, Alexander Kiselev, Dmitry Kolobov, Evgeny Kopylov, Maxim Shikhovtsev, Fedor Avdeev   +8 more
doaj   +1 more source

Towards operational optical turbulence forecast systems at different scales [PDF]

, 2023
Elena Masciadri, Alessio Turchi, Luca Fini   +2 more
openalex   +1 more source

Cₙ² Modeling for Free-Space Optical Communications: A Review

IEEE Access
Atmospheric turbulence influence on optical wave propagation, referred to as optical turbulence, has long been studied for astronomical applications and is now being addressed for free-space optical communication links between ground and satellites ...
Florian Quatresooz, Claude Oestges
doaj   +1 more source

Unified Statistical Channel Modeling and performance analysis of Vertical Underwater Wireless Optical Communication Links considering Turbulence-Induced Fading [PDF]

, 2023
Dongling Xu, Xiang Yi, Yalçn Ata, Xinyue Tao, Yuxuan Li, Peng Yue   +5 more
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Performance analysis of optical differential spatial modulation over atmospheric joint effect

Tongxin xuebao, 2023
Traditional optical spatial modulation techniques all rely on the premise that the system receiving end can obtain accurate channel state information.The optical differential spatial modulation (ODSM) system effectively avoids complex channel estimation,
Hui ZHAO, Jin LI, Weiwen MA, Wenchao DENG, Tianqi ZHANG, Yuanni LIU   +5 more
doaj   +2 more sources

Characterization of Localized Atmospheric Turbulence Layer Using Laser Light Backscattered off Moving Target

Applied Sciences, 2020
A concept of atmospheric turbulence characterization using laser light backscattered off a moving unresolved target or a moving target with a glint is considered and analyzed through wave-optics numerical simulations.
Victor A. Kulikov, Svetlana L. Lachinova, Mikhail A. Vorontsov, Venkata S. Rao Gudimetla   +3 more
doaj   +1 more source