Results 31 to 40 of about 9,282,430 (299)

Solar Pumped Lasers for Free Space Laser Communication

Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology, 2019
Solar Pumped Lasers (SPL) is a kind of lasers that can transform solar light into laser directly, with the advantages of least energy transform procedure, higher energy transform efficiency, higher reliability, and longer lifetime, which is suitable for use in unattended space system, for solar light is the only form of energy source in space. In order
Changming Zhao, Haiyang Zhang, Zhe Guan, Zitao Cai, Dongbing He, Yongheng Wang   +5 more
openaire   +1 more source

The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]

, 2008
In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih, A. Chaman Motlagh, Z. Ghassemlooy, Ahmadi, Vahid, Chaman Motlagh, Abolfazl, V. Ahmadi, Abedi, Kambiz, K. Abedi   +7 more
core   +1 more source

Fast Underwater Optical Beacon Finding and High Accuracy Visual Ranging Method Based on Deep Learning

Sensors, 2022
Visual recognition and localization of underwater optical beacons is an important step in autonomous underwater vehicle (AUV) docking. The main issues that restrict the use of underwater monocular vision range are the attenuation of light in water, the ...
Bo Zhang, Ping Zhong, Fu Yang, Tianhua Zhou, Lingfei Shen   +4 more
doaj   +1 more source

A space-based laser system for the deflection and manipulation of near Earth asteroids [PDF]

, 2014
Analysis gained from a series of experiments has demonstrated the effectiveness of laser ablation for the low thrust, contactless deflection and manipulation of Near Earth Asteroids.
Wayman, Alastair, Vasile, Massimiliano, Gibbings, Alison, Hopkins, John-Mark, Watson, Ian A., Eckersley, Steven   +5 more
core   +3 more sources

Airborne Validation Experiment of 1.57-μm Double-Pulse IPDA LIDAR for Atmospheric Carbon Dioxide Measurement

Remote Sensing, 2020
The demand for greenhouse gas measurement has increased dramatically due to global warming. A 1.57-μm airborne double-pulse integrated-path differential absorption (IPDA) light detection and ranging (LIDAR) system for CO2 concentration measurement was ...
Yadan Zhu, Juxin Yang, Xiao Chen, Xiaopeng Zhu, Junxuan Zhang, Shiguang Li, Yanguang Sun, Xia Hou, Decang Bi, Lingbing Bu, Yang Zhang, Jiqiao Liu, Weibiao Chen   +12 more
doaj   +1 more source

Phase-Shift Laser Ranging Technology Based on Multi-Frequency Carrier Phase Modulation

Photonics, 2022
Compared to traditional phase laser ranging technology, phase-shift laser ranging technology based on carrier phase modulation has significant advantages, such as simple modulation and demodulation, as well as simultaneous ranging and velocity ...
Lisha Zhou, Hongyu He, Jianfeng Sun, Baojun Lin   +3 more
doaj   +1 more source

Design of a Phase Sensor Applied in the Optical Phase-Locked Loop Based on a High-Speed Coherent Laser Communication System

IEEE Access, 2018
The background of our research is, designing a precise phase detection sensor for high-speed coherent homodyne systems, and combining it with optical phase-locked loops (OPLLs) to achieve coherent demodulation and carrier recovery.
Yang Liu, Shoufeng Tong, Shuai Chang, Yansong Song, Yan Dong, Xin Zhao, Zhe An, Fuwan Yu   +7 more
doaj   +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

Free space laser communications [PDF]

Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013), 1999
Summary form only given. Increased data transfer demands, limited RF spectral allocations, and emphasis on smaller spacecraft platforms to keep launch costs down are forcing space mission planners to consider free-space optical communications for their space-ground and intersatellite communications links.
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WDM laser transmitters for mobile free-space laser communications [PDF]

, 2018
We describe the performance of versatile high-performance multi-rate WDM laser transmitters using next-generation compact high-extinction-ratio power-efficient (CHERPe) transmitter designs.
Schulein, Robert T., Stevens, Mark L., Spector, Steven Jay, Carney, John J., Caplan, David O.   +4 more
core   +1 more source