Results 11 to 20 of about 423,477 (202)

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

Free-space and underwater GHz data transmission using AlGaInN laser diode technology [PDF]

, 2016
Laser diodes fabricated from the AlGaInN material system is an emerging technology for defence and security applications; in particular for free space laser communication.
Boćkowski, M., Czernecki, R., Kelly, A.E., Kucharski, R., Leszczyński, M., Marona, L., Najda, S.P., Perlin, P., Suski, T., Targowski, G., Watson, S., Wisniewski, P.   +11 more
core   +1 more source

AlGaInN laser diode technology for GHz high-speed visible light communication through plastic optical fiber and water [PDF]

, 2016
AlGaInN ridge waveguide laser diodes are fabricated to achieve single-mode operation with optical powers up to 100 mW at ∼420  nm∼420  nm for visible free-space, underwater, and plastic optical fiber communication.
Czernecki, Robert, Kelly, Antony E., Kucharski, Robert, Leszczynski, Mike, Marona, Lucja, Najda, Stephen P., Perlin, Piotr, Suski, Tadek, Targowski, Grzegorz, Watson, Malcolm A., Watson, Scott, White, Henry, Wisniewski, Przemek   +12 more
core   +1 more source

Laser Technology in Photonic Applications for Space

Instruments, 2019
The registered history of laser technologies for space application starts with the first laser echoes reflected off the Moon in 1962. Since then, photonic technologies have become very prominent in most technical development.
Denis Guilhot, Pol Ribes-Pleguezuelo
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

Application of novel techniques for interferogram analysis to laser-plasma femtosecond probing [PDF]

, 2001
Recently, two novel techniques for the extraction of the phase-shift map (Tomassini {\it et.~al.}, Applied Optics {\bf 40} 35 (2001)) and the electronic density map estimation (Tomassini P.
Borghesi, M., Galimberti, M., Giulietti, A., Giulietti, D., Gizzi, L. A., Numico, R., Tomassini, P.   +6 more
core   +2 more sources

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

Simulation and Design of Circular Scanning Airborne Geiger Mode Lidar for High-Resolution Topographic Mapping

Sensors, 2022
Over the last two decades, Geiger-mode lidar (GML) systems have been developing rapidly in defense and commercial applications, demonstrating high point density and great collection efficiency. We presented a circular scanning GML system simulation model
Fanghua Liu, Yan He, Weibiao Chen, Yuan Luo, Jiayong Yu, Yongqiang Chen, Chongmiao Jiao, Meizhong Liu   +7 more
doaj   +1 more source

High Speed Visible Light Communication Using Blue GaN Laser Diodes [PDF]

, 2016
GaN-based laser diodes have been developed over the last 20 years making them desirable for many security and defence applications, in particular, free space laser communications.
Czernecki, R., Giuliano, G., Kelly, A.E., Laycock, L., Leszczyński, M., Marona, L., Najda, S.P., Perlin, P., Rowe, D., Suski, T., Targowski, G., Viola, S., Watson, M. A., Watson, S., White, H., Wisniewski, P.   +15 more
core   +2 more sources