A review–unguided optical communications: Developments, technology evolution, and challenges

AAB Raj, P Krishnan, U Darusalam, G Kaddoum… - Electronics, 2023 - mdpi.com
This review paper discusses the complete evolution of free-space optical (FSO)
communication, also known as unguided optical communication (UOC) technologies, all the …

A survey of free space optics (FSO) communication systems, links, and networks

SA Al-Gailani, MFM Salleh, AA Salem… - IEEE …, 2020 - ieeexplore.ieee.org
The next generation (NG) optical technologies will unveil certain unique features, namely
ultra-high data rate, broadband multiple services, scalable bandwidth, and flexible …

1000 Gbps MDM-WDM FSO link employing DP-QPSK modulation scheme under the effect of fog

S Kaur, R Goyal, S Chaudhary - Optik, 2022 - Elsevier
In this work, a dual polarization-quadrature phase shift keying (DP-QPSK) modulation
scheme has been used for analysing the performance of terrestrial MDM-WDM FSO link at a …

640 Gbps FSO data transmission system based on orbital angular momentum beam multiplexing employing optical frequency comb

B Dutta, N Sarkar, R Atta, B Kuiri, S Santra… - Optical and Quantum …, 2022 - Springer
Orbital angular momentum (OAM) beams are basically twisted beams with infinite number of
possible orthogonal OAM states. A 640 Gbps (4× 16× 10 Gbps) data transmission over 180 …

A high-speed radio-over-free-space optics link using wavelength division multiplexing-mode division multiplexing-multibeam technique

M Balasaraswathi, M Singh, J Malhotra… - Computers & Electrical …, 2020 - Elsevier
Abstract Radio-over-Free-Space Optics (RoFSO) is a key technology for providing high-
speed communication links in rural areas. In this work, an orthogonal frequency division …

Enhanced performance of the 4× 20 Gbit/s-40 GHz OFDM-based RoFSO transmission link incorporating WDM-MDM of Hermite Gaussian and Laguerre Gaussian …

K Singh, M Singh, A Grover, R Miglani, H Singh… - Frontiers in …, 2022 - frontiersin.org
A 4× 20 Gbit/s-40 GHz orthogonal frequency-division multiplexing-based radio-on-free-
space optics information link, integrating hybrid wavelength-and mode-division multiplexed …

Performance analysis of multiple-beam WDM free space laser-communication system using homodyne detection approach

YK Gupta, A Goel - Heliyon, 2023 - cell.com
A free space optical module is used in laser communication to transport a signal from the
transmitter to the receiver. Free Space Optical Communication (FSOC) is a Line of Sight …

Performance investigation of 1.6 Tbps hybrid WDM-PDM-OFDM-based free space optics transmission link

M Singh, J Malhotra, A Atieh, HJ El-Khozondar… - Wireless Personal …, 2021 - Springer
A novel ultra-high capacity free space optics (FSO) link has been developed by
incorporating hybrid wavelength divison multiplexing (WDM)-polarization division …

Performance analysis and enhancement of free space optical links for developing state-of-the art smart city framework

S Chauhan, R Miglani, L Kansal, GS Gaba, M Masud - Photonics, 2020 - mdpi.com
In this paper, we have investigated and reported the performance of free-space optical
(FSO) links operating in adverse atmospheric conditions. Since FSO links share operational …

[HTML][HTML] 1600 Gbps PAM-4 FSO link enabled using OFCL-based WDM and OAM-multiplexing techniques

B Dutta, N Sarkar, R Atta, B Kuiri, AS Patra - Results in Optics, 2022 - Elsevier
The twisted light beams carry orbital angular momentum (OAM), which acts as additional
degrees of freedom. In this work, we have proposed a free space optics (FSO) …