[HTML][HTML] 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 …

Performance enhancement of hybrid fiber wavelength division multiplexing passive optical network FSO systems using M-ary DPPM techniques under interchannel …

EE Elsayed, BB Yousif, M Singh - Optical and Quantum Electronics, 2022 - Springer
The performance of moment generating function approaches, specifically Chernoff bound
(CB) and modified Chernoff bound (MCB), is examined and improved in this study. We …

Performance enhancement of hybrid diversity for M-ary modified pulse-position modulation and spatial modulation of MIMO-FSO systems under the atmospheric …

EE Elsayed, BB Yousif - Optical and Quantum Electronics, 2020 - Springer
In this paper, we propose a novel model for hybrid spatial diversity of M-ary pulse position
modulation (M-ary PPM) and spatial modulation (SM) with a multiple-input multiple-output …

Design of ring-based 1 Tbps hybrid PON-FSO fault protection system using add/drop multiplexer

M Kumari, V Arya - Optical and Quantum Electronics, 2023 - Springer
The demand for fault protection transmission link with high-speed, high security and long-
reach in an optical access network is growing at an exponential rate. It is quite difficult to …

[HTML][HTML] Performance enhancement of DWDM-FSO optical fiber communication systems based on hybrid modulation techniques under atmospheric turbulence …

MR Hayal, BB Yousif, MA Azim - Photonics, 2021 - mdpi.com
In this paper, we enhance the performance efficiency of the free-space optical (FSO)
communication link using the hybrid on-off keying (OOK) modulation, M-ary digital pulse …

[HTML][HTML] Investigations on OFDM UAV-based free-space optical transmission system with scintillation mitigation for optical wireless communication-to-ground links in …

EE Elsayed - Optical and Quantum Electronics, 2024 - Springer
The potential integration of unmanned aerial vehicles (UAVs) with free space optical (FSO)
communication systems stands as a promising innovation in the realm of wireless network …

[HTML][HTML] Modeling and investigation on the performance enhancement of hovering UAV-based FSO relay optical wireless communication systems under pointing …

MR Hayal, EE Elsayed, D Kakati, M Singh… - Optical and Quantum …, 2023 - Springer
This paper investigates and enhances unmanned aerial vehicle (UAV) relay-assisted free-
space optics (FSO) optical wireless communication (OWC) systems under the effects of …

Atmospheric turbulence mitigation of MIMO-RF/FSO DWDM communication systems using advanced diversity multiplexing with hybrid N-SM/OMI M-ary spatial pulse …

EE Elsayed - Optics Communications, 2024 - Elsevier
This paper introduces an assessment framework for the effectiveness of free-space optical
(FSO) communication systems that combine multilevel modulation with the use of orbital …

[HTML][HTML] SMF/FSO integrated dual-rate reliable and energy efficient WDM optical access network for smart and urban communities

AK Garg, SK Metya, G Singh, V Janyani, MH Aly… - Optical and Quantum …, 2021 - Springer
To handle the massive high-speed internet traffic, free space optics (FSO) or single-mode
fiber (SMF) based fiber optic communication is being used everywhere across the world …

Single-shot phase retrieval for randomly fluctuated and obstructed vortex beams

H Zhang, J Zhu, X Lu, Z Hu, J Gao, K Liu… - Science China Physics …, 2024 - Springer
Vortex beams with orbital angular momentum play a crucial role in increasing the
information capacity in optical communications. The magnitude of orbital angular momentum …