Results 61 to 70 of about 423,477 (202)

Modeling and power analysis for uplink of laser communication between airplane and satellite

Tongxin xuebao, 2008
Aiming at the uplink of laser communication between airplane and satellite, the factors including the ambient light, the loss of laser propagating in atmosphere, the receiving efficiency of receiver and the laser intensity fluctuation, which all can ...
CHEN Chun-yi1, YANG Hua-min1, TONG Shou-feng2, JIANG Hui-lin2   +3 more
doaj  

Research on High-Precision Initial Pointing for Near-Earth Laser Communication

Photonics
This paper proposes a systematic ground experimental method to address the insufficient initial pointing accuracy of optical terminals in free space optical communication (FSO).
Yuang Li, Xuan Wang, Junfeng Han, Xinxin Quan   +3 more
doaj   +1 more source

Gamma Radiation-Induced Effects over an Optical Fiber Laser: Towards New Sensing Applications

Sensors, 2020
In the present work, the effect of gamma radiation on the performance of different types of erbium-doped fibers (EDFs) when they are used in a fiber ring cavity (FRC) configuration is studied.
Rosa Ana Perez-Herrera, Andrei Stancalie, Pablo Cabezudo, Dan Sporea, Daniel Neguţ, Manuel Lopez-Amo   +5 more
doaj   +1 more source

Wideband, high efficiency optical modulator requires less than 10 watts drive power [PDF]

, 1967
Wideband optical modulation system operates with less than 10-watts drive power. It consists of an optical modulator and transistorized driver that combines small cross-section potassium dideuterium phosphate crystals with laser beam-condensing optics ...
Becknell, W. E., Rattman, W. J., Yap, B. K.   +2 more
core   +1 more source

Technology forecasting for space communication: Executive summary [PDF]

Technology forecasting was used to examine the possibility of transferring laser and radio frequency communication techniques to space ...

core   +1 more source

Method and apparatus for convection control of metallic halide vapor density in a metallic halide laser [PDF]

, 1982
An apparatus is disclosed in which a reservoir containing copper chloride is heated so that the copper chloride is maintained in a liquid form. The apparatus includes a means for flowing a buffer gas (which in the exemplary embodiment is neon) over the ...
Pivirotto, T. J.
core   +1 more source

Robot-sensor synchronization for real-time seamtracking in robotic laser welding [PDF]

, 2005
The accuracy requirements of laser welding put high demands on the manipulator that is used. To use industrial six-axis robots for manipulating the laser welding optics, sensors measuring the seam trajectory close to the focal spot are required to meet ...
Aarts, R.G.K.M., Graaf, M.W. de, Jonker, J.B., Meijer, J.   +3 more
core   +3 more sources

Creation of backdoors in quantum communications via laser damage

, 2016
Practical quantum communication (QC) protocols are assumed to be secure provided implemented devices are properly characterized and all known side channels are closed. We show that this is not always true.
Bourgoin, Jean-Philippe, Chaiwongkhot, Poompong, Gagné, Mathieu, Jennewein, Thomas, Kaiser, Sarah, Kashyap, Raman, Legré, Matthieu, Makarov, Vadim, Minshull, Carter, Sajeed, Shihan   +9 more
core   +1 more source

Beam Scanning and Capture of Micro Laser Communication Terminal Based on MEMS Micromirrors. [PDF]

Micromachines (Basel), 2023
Wang X, Han J, Wang C, Xie M, Liu P, Cao Y, Jing F, Wang F, Su Y, Meng X.   +9 more
europepmc   +1 more source

A Computational Model of Cn2 Profile Inversion for Atmospheric Laser Communication in the Vertical Path. [PDF]

Sensors (Basel), 2023
Yao H, Cao Y, Wang W, Jiang Q, Cao J, Hao Q, Liu Z, Zhang P, Chang Y, Zhang G, Geng T.   +10 more
europepmc   +1 more source