Results 21 to 30 of about 19,065 (260)
CTA Telescopes as Deep-Space Lasercom Ground Receivers
IEEE Photonics Journal, 2015 The amount of scientific data to be transmitted from deep-space probes is very limited due to radio-frequency (RF) communications constraints. Free-space optical communication can alleviate this bottleneck, increasing data rate while reducing weight ...
Alberto Carrasco-Casado +2 more
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Photonics, 2022 Ultraviolet (UV) communication is considered an effective complement to traditional wireless communication. However, the scattering models of existing non-line-of-sight (NLOS) UV, which are complex, are difficult to combine with the test.
Axin Du +5 more
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Free-space optical delay line using space-time wave packets
Nature Communications, 2020 Delay lines are a critical part of future optical communications. Here, the authors create a delay line in free space by tuning the group velocities of multiple inline space-time wavepackets to introduce different delays.
Murat Yessenov +3 more
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Analysis of Free-Space Optics Development
Metrology and Measurement Systems, 2017 The article presents state of work in technology of free-space optical communications (Free Space Optics − FSO). Both commercially available optical data links and their further development are described.
Mikołajczyk Janusz +7 more
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Modelling Investigation of Atmospheric Turbulence-Induced Beam Deviation for LEO/GEO FSO Communication Link [PDF]
EPJ Web of ConferencesThe uplink analytical simulation scenario of atmospheric turbulence-induced beam deviation can give the insight needed to understand and create the mitigation techniques that could support novel applications in the fields of free-space optical ...
Al-Juboori Haider
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Prospects and Challenges of Free Space Optical Communications
, 2018 Free space optical (FSO) transmission is a technology which uses a narrow laser beam to transmit the signal from the source to the destination through the free space. Although it has various advantages, a laser beam propagating through the atmosphere is subjected to different kind of disturbances causing the attenuation of the signal and, in some ...
Abir Touati +4 more
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Adaptive symbol-rate free-space-optical communications [PDF]
2013 Australian Communications Theory Workshop (AusCTW), 2013 Free space optical communications through fading atmospheric channels can achieve improved throughput by using adaptive transmission techniques. This paper considers the use of adaptive symbol-rate and transmit-power methods. We use an idealised model of channel coding that assumes zero errors can be achieved above some SNR threshold and adjust the ...
William G. Cowley +2 more
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An optically powered, free space optical communications receiver
2008 IEEE International Symposium on Circuits and Systems (ISCAS), 2008 Two of the key components of sensor motes are a power source and a communications receiver. One approach to creating very small motes is to use free space optical communication and to scavenge power from the optical downlink. In this paper photodiodes are described that were made on a standard CMOS process and generate electrical power from the ...
Liu, J +4 more
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Applied Physics ExpressWe report a coherent laser transmitter for free space optical communications based on multiwavelength coherent beam combining. We performed 5.6 Gbps free-space optical communications using a two-element optical phased array with three wavelengths ...
Eisuke Haraguchi +6 more
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IEEE Photonics Journal, 2018 When an eavesdropper performs an optical beam-splitting attack in a free-space optical communications channel, it is referred to as an optical wiretap channel, which is an extension of Wyner's wiretap channel model.
Tyan-Lin Wang, Ivan B. Djordjevic
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