Results 11 to 20 of about 7,275,136 (257)

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

Experimental study of bit error rate of free space optics communications in laboratory controlled turbulence [PDF]

open access: yes, 2010
This paper reports experimental results for the performance of an free space optical (FSO) communication link employing different modulation schemes under the influence of the atmospheric scintillation.
Z. Ghassemlooy   +13 more
core   +1 more source

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

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

Arrayed Waveguide Grating Spectrometer on 2-µm-thick SOI Platform [PDF]

open access: yesEPJ Web of Conferences, 2023
32-channel arrayed waveguide grating spectrometer (AWG) at 1800 nm is demonstrated on a 2-µm-thick silicon-on-insulator (SOI) platform. The design and simulation of the device are performed using the beam propagation method (BPM) and we obtain the 3-dB ...
Tippinit Janvit   +2 more
doaj   +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

MIMO free-space optical communication employing subcarrier intensity modulation in atmospheric turbulence channels [PDF]

open access: yes, 2009
In this paper, we analyse the error performance of transmitter/receiver array free-space optical (FSO) communication system employing binary phase shift keying (BPSK) subcarrier intensity modulation (SIM) in clear but turbulent atmospheric channel ...
Ghassemlooy, Zabih   +7 more
core   +1 more source

A Hybrid Optical Fiber and FSO System for Bidirectional Communications Used in Bridges [PDF]

open access: yes, 2015
In this paper, a 10-Gb/s hybrid optical fiber (OF) and free-space optics (FSO) link as part of a bidirectional long-haul OF transmission for application in outdoor environments such as bridges is proposed.
Ghassemlooy, Zabih   +4 more
core   +1 more source

Analysis and evaluation of optimum wavelengths for free-space optical transceivers [PDF]

open access: yes, 2010
The objective of this paper is to analyse and present the latest results obtained for free-space optics (FSO) within the EU COST Action IC-0802 and within the European Space Agency (ESA) contract.
Z. Ghassemlooy   +15 more
core   +1 more source

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