Results 11 to 20 of about 5,760,414 (306)

Simulation and Design of an Underwater Lidar System Using Non-Coaxial Optics and Multiple Detection Channels

Remote Sensing, 2023
The efficacy of underwater laser detection is considerably impacted by the intense attenuation of light resulting from the scattering and absorption effects of water. In this study, we present the simulation and design of the underwater Lidar system that
Yongqiang Chen, Shouchuan Guo, Yan He, Yuan Luo, Weibiao Chen, Shanjiang Hu, Yifan Huang, Chunhe Hou, Sheng Su   +8 more
doaj   +1 more source

Monte Carlo Simulation with Experimental Research about Underwater Transmission and Imaging of Laser

Applied Sciences, 2022
Attenuation of the laser beam in underwater transmission and detection due to absorption and scattering results in a rapid reduction in energy and blurring of the image.
Shouchuan Guo, Yan He, Yongqiang Chen, Weibiao Chen, Qi Chen, Yifan Huang   +5 more
doaj   +1 more source

Topology and Size Optimized Design and Laser Welding of the U-Frame for Free-Space Laser Communication Telescopes

Machines, 2023
The success of laser communications heavily relies on the stiffness, dynamic properties, static performance, and manufacturability of the U-frame. The U-frame is a fundamental element in satellite-to-ground laser communication telescopes.
Guangzhen Li, Zhanwei Huo, Jian Yuan, Luyang Tan, Lei Zhang, Ji Li   +5 more
doaj   +1 more source

Design and Simulation Analysis of Piezoelectric Ceramic Tube-Based Fiber Optic Nutator Applied to an Intersatellite Laser Communication System

Photonics, 2023
The signal-receiving end of acquisition, pointing, and tracking (APT) systems applied to intersatellite laser communication terminals usually uses a fast-steering mirror (FSM) to control the fiber-coupling process, has a complex structural design, and ...
Bo Peng, Ping Ruan, Junfeng Han, Xiangyu Li, Zhiyuan Chang, Yifan Wang, Xuan Wang   +6 more
doaj   +1 more source

High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method

IEEE Photonics Journal, 2020
Phase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and the amplitude of the vibration.
Jinfeng Gu, Bin Lu, Junqi Yang, Zhaoyong Wang, Lei Ye, Qing Ye, Ronghui Qu, Haiwen Cai   +7 more
doaj   +1 more source

A demonstration of LISA laser communication [PDF]

Classical and Quantum Gravity, 2006
minor corrections found in the CQG ...
Pollack, Scott E, Stebbins, Robin Tuck
openaire   +2 more sources

Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]

, 2012
In laser　cutting　of　thick　steel　sheets,　quality　difference　is　observed　between　cut　surfaces　obtained　with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro, Koji Hirano, FABBRO, Rémy, HIRANO, Koji   +3 more
core   +1 more source

Analysis of hybrid Nd:Yag laser-MAG arc welding processes. [PDF]

, 2011
In the hybrid laser-arc welding process, a laser beam and an electric arc are coupled in order to combine the advantages of both processes: high welding speed, low thermal load and high depth penetration thanks to the laser; less demanding on joint ...
F. Coste, E. Le Guen, P. Le Masson, COSTE, Frédéric, LE MASSON, Philippe, M. Carin, LE GUEN, Emilie, FABBRO, Rémy, CARIN, Muriel, R. Fabbro   +9 more
core   +1 more source

Hardware routed quantum key distribution networks

IET Quantum Communication, 2022
Quantum communication networks pose immense potential for revolutionising secure communications for several applications such as banking, defence, etc.
Ansh Singal, Sundaraja Sitharam Iyengar, Latesh Kumar, Azad M. Madni   +3 more
doaj   +1 more source

Laser microsampling of soil microbial community [PDF]

Journal of Biological Engineering, 2018
Standard microorganism isolating technology applied for complex multiphase environmental samples such as soil or sediment needs pre-treatment steps to remove living cells from their mixed-phase microniche, by creating a liquid-phase sample. This process removes synergetic relationships, which help to maintain viability of yet-to-be-cultured and hard-to-
M. V. Gorlenko, E. A. Chutko, E. S. Churbanova, N. V. Minaev, K. I. Kachesov, L. V. Lysak, S. A. Evlashin, V. S. Cheptsov, A. O. Rybaltovskiy, V. I. Yusupov, V. S. Zhigarkov, G. A. Davydova, B. N. Chichkov, V. N. Bagratashvili   +13 more
openaire   +3 more sources