Results 1 to 10 of about 1,035 (272)

Beam Wander Restrained by Nonlinearity of Femtosecond Laser Filament in Air [PDF]

Sensors, 2022
The filamentation process under atmospheric turbulence is critical to its remote-sensing application. The effects of turbulence intensity and location on the spatial distribution of femtosecond laser filaments in the air were studied.
Jiewei Guo, Lu Sun, Jinpei Liu, Binpeng Shang, Shishi Tao, Nan Zhang, Lie Lin, Zhi Zhang   +7 more
doaj   +3 more sources

Link budget analysis of bi-directional LEO and GEO optical feeder links advancing the beam wander model’s accuracy [PDF]

Scientific Reports
The telecommunications of the future rely on the concept of a three-dimensional architecture able to integrate terrestrial and non-terrestrial networks with the goal to ensure a reliable and high-speed connectivity to users located anywhere.
Carla Cantore, Davide Monopoli, Angelo Altamura, Alberto Mengali, Marco Grande, Antonella D’Orazio   +5 more
doaj   +3 more sources

Wander of a Gaussian-Beam Wave Propagating through Kolmogorov and Non-Kolmogorov Turbulence along Laser-Satellite Communication Uplink

Atmosphere, 2022
It is accepted that there exists two kinds of atmospheric turbulence in the Earth’s aerosphere—Kolmogorov and non-Kolmogorov turbulence; therefore, it is important to research their combined impacts on laser-satellite communications.
Fazhi Wang, Wenhe Du, Qi Yuan, Daosen Liu, Shuang Feng   +4 more
doaj   +2 more sources

Beam wander prediction with recurrent neural networks

Optics Express, 2023
Among the problems that prevent free-space optical communication systems from becoming a truly mainstream technology is beam wander, which is especially important for structured light beams since beam misalignment introduces additional crosstalk at the receiver.
Dmitrii Briantcev, Mitchell A. Cox, Abderrahmen Trichili, Boon S. Ooi, Mohamed-Slim Alouini   +4 more
openaire   +4 more sources

Turbulence-Resistant Femtosecond Filaments via Nonlinear Self-Guiding and OAM Modulation [PDF]

Sensors
As a prominent frontier in ultrafast laser–matter interaction, femtosecond laser filamentation holds great potential for atmospheric pollutant detection and remote sensing. However, its practical application in the open atmosphere is severely hampered by
Jinpei Liu, Xi Yang, Weiyun Jin, Zuyou Ren, Caiyi Yang, Tingting Shi   +5 more
doaj   +2 more sources

Approximations wander model for the Lommel Gaussian-Schell beam through unstable stratification and weak ocean-turbulence

Results in Physics, 2019
By analyzing the construction features of a Lommel Gaussian-Schell beam and the beam wander for Gaussian beams, we derive the closed-from approximations expression for the wander of Lommel Gaussian-Schell beam through unstable stratification and weak ...
Qiyong Liang, Yun Zhu, Yixin Zhang
doaj   +3 more sources

Propagation characteristics of the vortex beam array through anisotropic non-Kolmogorov maritime atmospheric turbulence [PDF]

Frontiers in Physics, 2023
This study employs the power spectrum inversion method to generate the phase screens of atmospheric turbulence over the sea, the theoretical model of the vortex beam array emitted by a focusing system through anisotropic non-Kolmogorov maritime ...
Hong Yu, Hong Yu, Bowen Yang, Hanyin Hu, Zheqiang Zhong, Bin Zhang   +5 more
doaj   +2 more sources

Experimental study of the transport characteristics of fractional-order vortex beams in a turbulent atmosphere simulator

AIP Advances, 2023
Fractional vortex beams have attracted increasing attention due to their complex yet intriguing physical properties, such as radial notch intensity distribution and higher degrees of modulation in orbital angular momentum.
Xiang Xu, Xian-mei Qian, Chuan-kai Luo, Xiao-wei Chen, Chao-long Cui, Wen-yue Zhu   +5 more
doaj   +1 more source

Beam wandering in the atmosphere: The effect of partial coherence [PDF]

Physical Review E, 2007
16 pages, 5 ...
Berman, G. P., Chumak, A. A., Gorshkov, V. N.   +2 more
openaire   +3 more sources

Second-Order Statistics of Partially Coherent Beams with Laguerre Non-Uniform Coherence Properties under Turbulence

Photonics, 2023
We use the extended Huygens–Fresnel integral to analyze the propagation properties of a class of partially coherent beams with Laguerre non-uniform coherence properties (called Laguerre non-uniformly correlated beams) in free space and in a turbulent ...
Yang Zhao, Zhiwen Yan, Yibo Wang, Liming Liu, Xinlei Zhu, Bohan Guo, Jiayi Yu   +6 more
doaj   +1 more source