Results 11 to 20 of about 7,598,998 (257)

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

open access: yesIEEE Access, 2021
The next generation (NG) optical technologies will unveil certain unique features, namely ultra-high data rate, broadband multiple services, scalable bandwidth, and flexible communications for manifold end-users.
Samir Ahmed Al-Gailani   +6 more
doaj   +1 more source

Optical Axis Identification Technique for Free Space Optics Transmission

open access: yesInternational Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, 2017
This paper describes optical axis adjustment technique for an active free space optics transmission system. This system precisely controls the direction of a collimated thin laser beam using a motor driven laser emitting mechanism and positioning ...
Yuki Tashiro   +4 more
doaj   +1 more source

Optical power allocation for adaptive transmissions in wavelength-division multiplexing free space optical networks

open access: yesDigital Communications and Networks, 2015
Attracting increasing attention in recent years, the Free Space Optics (FSO) technology has been recognized as a cost-effective wireless access technology for multi-Gigabit rate wireless networks.
Hui Zhou, Shiwen Mao, Prathima Agrawal
doaj   +1 more source

BER and outage probability of DPSK subcarrier intensity modulated free space optics in fully developed speckle. [PDF]

open access: yes, 2009
In this paper a differential phase shift keying (DPSK) subcarrier intensity modulated (SIM) free space optical (FSO) link is considered in negative exponential atmospheric turbulence environment.
Ghassemlooy, Zabih   +4 more
core   +1 more source

An Overview of Free Space Optics with Quantum Cascade Lasers [PDF]

open access: yes, 2014
The article presents an overview of the work on quantum cascade lasers application in free space optical systems (Free Space Optics - FSO). There are discussed the main issues of the open-space laser communications and their practical construction ...
Mikołajczyk, Janusz, Mikołajczyk, J.
core   +3 more sources

Free Space Optics: Current Applications and Future Challenges

open access: yesInternational Journal of Optics, 2015
FSO is a communication system where free space acts as medium between transceivers and they should be in LOS for successful transmission of optical signal. Medium can be air, outer space, or vacuum.
Aditi Malik, Preeti Singh
doaj   +1 more source

Turbulence Characterization of a Free Space Optical Communication Link for High Performance Adaptive Optics Control

open access: yes, 2022
International audienceOptimal control has been shown to improve astronomical adaptive optics, and is considered in free space optical communication, where signal stability is crucial.
Mata Calvo, Ramon   +5 more
core   +1 more source

Adaptive free space optic system based on visibility detector to overcome atmospheric attenuation

open access: yesResults in Physics, 2019
Free space optics (FSO) provides high data rate by allowing transmission of signal through atmosphere. FSO is affected by different weather conditions. The atmospheric attenuation is caused by two main factors; absorption and scattering.
Muhammad K. El-Nayal   +3 more
doaj   +1 more source

Continuous wave Bessel beams with a strong longitudinal acceleration in free space

open access: yes, 2022
A variety of transversely accelerating optical beams, such as Airy, Mathieu, and Weber beams, have been proposed and intensively studied in the past few decades, while longitudinal acceleration of optical beams in free space has been considered much less
Hildén, Panu   +7 more
core   +1 more source

A survey of free space optical networks

open access: yesDigital Communications and Networks, 2017
Free Space Optical (FSO) networks, also known as optical wireless networks, have emerged as viable candidates for broadband wireless communications in the near future. The range of the potential application of FSO networks is extensive, from home to satellite.
In Keun Son, Shiwen Mao
openaire   +3 more sources

Home - About - Disclaimer - Privacy