Results 11 to 20 of about 17,683 (311)

Stability of optical knots in atmospheric turbulence

Nature Communications
Topology advances the understanding of many branches of science and technology, from elementary particle physics to condensed matter physics. While the topological stability of mathematical knots implies robustness to perturbations and suggests their ...
D. G. Pires, D. Tsvetkov, H. Barati Sedeh, N. Chandra, N. M. Litchinitser   +4 more
doaj   +3 more sources

Daytime forecast of optical turbulence for optical communications

, 2023
In recent years, forecast of optical turbulence has been developed for astronomical sites. It enables flexible scheduling of observations during the night, and improves the control of adaptive optics systems.
Vanhoenacker-Janvier, Danielle, Oestges, Claude, Communications and Observations through Atmospheric Turbulence (COAT) 2023, Quatresooz, Florian   +3 more
core   +3 more sources

Optical rogue waves in integrable turbulence [PDF]

SPIE Proceedings, 2015
We report optical fiber experiments allowing to investigate integrable turbulence in the focusing regime of the one dimensional nonlinear Schrödinger equation (1D-NLSE). Our experiments are very similar in their principle to water tank experiments with random initial conditions (see M. Onorato {\it et al.} Phys. Rev. E {\bf 70} 067302 (2004)). Using an
Walczak, Pierre, Randoux, Stéphane, Suret, Pierre   +2 more
openaire   +3 more sources

Optical Rogue Waves in Vortex Turbulence [PDF]

Physical Review Letters, 2016
5 pages, 7 ...
Gibson, Christopher J., Yao, Alison M., Oppo, Gian-Luca   +2 more
openaire   +5 more sources

Design and Investigation of 10 Gb/s FSO Wiretap Channel Using OCDMA Time-Diversity Reception

IEEE Photonics Journal, 2020
In this paper, 10 Gb/s free space optical (FSO) wiretap channel using optical code division multiple access (OCDMA) time-diversity reception is designed and demonstrated for the first time.
Jianhua Ji, Bing Wu, Jianjia Zhang, Ming Xu, Ke Wang   +4 more
doaj   +1 more source

Investigation and demonstration of all‐optical hybrid fiber‐FSO‐fiber CDMA communication system

IET Communications, 2022
The authors investigate and demonstrate an all‐optical hybrid fiber‐free space optical (FSO)‐fiber communication system based on optical code division multiple access (OCDMA).
Fang Peng, Jianhua Ji, Yufeng Song, Ke Wang, Ming Xu   +4 more
doaj   +1 more source

Method of Estimation of Turbulence Integral Parameters

Applied Sciences, 2021
The optical effects of turbulence are directly related to turbulence integral parameters, which are integrals of the refractive index structure constant over a whole path with different path-weighting functions (PWFs).
Hong Shen, Longkun Yu, Xu Jing, Fengfu Tan   +3 more
doaj   +1 more source

The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]

, 2008
In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih, A. Chaman Motlagh, Z. Ghassemlooy, Ahmadi, Vahid, Chaman Motlagh, Abolfazl, V. Ahmadi, Abedi, Kambiz, K. Abedi   +7 more
core   +1 more source

Study of the ${\mathit{C}}_{\mathit{n}}^{\mathbf{2}}$ Model through the New Dimensionless Temperature Structure Function near the Sea Surface in the South China Sea

Remote Sensing, 2023
The refractive index structure constant Cn2 near the ocean surface is an important parameter for studying atmospheric optical turbulence over the ocean.
Feifei Wang, Kun Zhang, Gang Sun, Qing Liu, Xuebin Li, Tao Luo   +5 more
doaj   +1 more source

Coherent polarization shift keying modulated free space optical links over a Gamma-Gamma turbulence channel [PDF]

, 2011
Problem statement: The optical signal propagating through the Free Space Optical (FSO) channel suffers from irradiance and phase fluctuations caused by the atmospheric turbulence, which results in Bit Error Rate (BER) performance degradation ...
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Popoola, Wasiu O., Tang, Xuan, Rajbhandari, Sujan, Lee, Chung Ghiu, Ghassemlooy , Zabih, Lee , Chung Ghiu   +7 more
core   +1 more source