Results 31 to 40 of about 3,883 (302)
Adaptive optics correction of scintillation for oceanic turbulence-affected laser beams [PDF]
, 2022 Paper 1078709, 15 S.We theoretically investigate the performance of adaptive-optics correction for Gaussian beams affected by oceanic turbulence. Action of adaptive optics is modeled as removal of a certain number of Zernike modes from the aberrated ...
Gladysz, Szymon, Toselli, Italo
core +1 more source
Bit error rate performance of underwater optical wireless communication with hybrid modulation
IET Communications, 2023 Turbulence effects can cause performance degradation for underwater optical wireless communication (UOWC) system. In this paper, a hybrid modulation (modulation–modulation, M–M) is presented to resist turbulence‐induced fading and improve the ...
Qiong Luo +3 more
doaj +1 more source
Light scintillation in oceanic turbulence [PDF]
, 2012 The scintillation index of plane and spherical light waves as well as of a Gaussian beam, propagating in the clear-water weakly turbulent ocean, is revealed. The results are of utmost importance for underwater optical communications and sensing.
Farwell, N. +5 more
core +1 more source
Effects of Oceanic Turbulence on Orbital Angular Momenta of Optical Communications
Journal of Marine Science and Engineering, 2020 The propagation properties of Laguerre-Gaussian beams in oceanic turbulence are investigated for both single-photon and biphoton cases. For single-photon communication, the channel capacity and trace distance are employed, both of which effectively ...
Shuang Zhai +3 more
doaj +1 more source
Applied Sciences, 2019 Ghost imaging (GI) is an indirect imaging approach that can retrieve an object’s image even in a harsh environment through measuring the fourth-order correlation function (FOCF) between the signal and idle optical paths.
Yonglei Liu +5 more
doaj +1 more source
Statistical Characteristics of a Twisted Anisotropic Gaussian Schell-Model Beam in Turbulent Ocean
Photonics, 2020 The analytical expression of the cross-spectral density function of a twisted anisotropic Gaussian Schell-model (TAGSM) beam transmitting in turbulent ocean is derived by applying a tensor method.
Yonglei Liu +6 more
doaj +1 more source
Impeded inverse energy transfer in the Charney--Hasegawa--Mima model of quasi-geostrophic flows [PDF]
, 2010 The behaviour of turbulent flows within the single-layer quasi-geostrophic (Charney-Hasegawa-Mima) model is shown to be strongly dependent on the Rossby deformation wavenumber lambda (or free-surface elasticity). Herein, we derive a bound oil the inverse
Tran, Chuong Van +1 more
core +1 more source
Propagation Factors of Partially Coherent Model Beams in Oceanic Turbulence
IEEE Photonics Journal, 2017 Based on the extended Huygens–Fresnel principle and second-order moments of the Wigner distribution function, we have derived the analytical expressions of the propagation factor of four kinds of partially coherent model beams in oceanic ...
Xianwei Huang, Yanfeng Bai, Xiquan Fu
doaj +1 more source
A statistical approach to surface renewal: The virtual chamber concept
Agrosystems, Geosciences & Environment, 2021 In the stable conditions prevailing at night, concentrations of emitted gases (e.g., radon [Rn], carbon dioxide [CO2], methane [CH4], ammonia [NH3], and nitrous oxide [N2O]) build up at the surface, with intermittent interruptions due to the passage of ...
Bruce B. Hicks +6 more
doaj +1 more source
Tellus: Series B, Chemical and Physical Meteorology, 2019 Dry deposition is an important loss process for atmospheric particles and can be a significant part of total deposition estimates calculated for critical loads analyses. However, algorithms used in large-scale air quality and atmospheric chemistry models
Rick D. Saylor +5 more
doaj +1 more source