Field Demonstrations of Wide-beam Optical Communications through Water–Air Interface
Shamma, Jeff S.
Ng, Tien Khee
Ooi, Boon S.
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Integrated Ocean Processes Laboratory
Marine Science Program
Red Sea Research Center (RSRC)
Robotics, Intelligent Systems & Control Laboratory
Permanent link to this recordhttp://hdl.handle.net/10754/664926
MetadataShow full item record
AbstractThe connectivity of undersea sensors and airborne nodes across the water–air interface has been long sought. This study designs a free-space wireless laser communications system that yields a high net data rate of 850 Mbit/s when perfectly aligned. This system can also be used for an extended coverage of 1963 cm² at the receiver while sustaining a net data rate of 9 Mbit/s over 10 m. The utility of this system was verified for direct communications across the water–air interface in a canal of the Red Sea based on a pre-aligned link as well as a diving pool under a mobile signal-searching mode. The canal deployment measured a real-time data rate of 87 Mbit/s when pre-aligned in turbid water over 50 min, which confirms the system robustness in harsh water environments. In the pool deployment, a drone configured with a photodetector flew over the surface of the water and recorded the underwater signals without a structure-assisted alignment. Using a four-quadrature amplitude-modulated orthogonal frequency-division multiplexing (4-QAM-OFDM) modulation scheme provided a net data rate of 44 Mbit/s over a 2.3-m underwater and 3.5-m air link. The results validated the link stability and mitigated problems that arise from misalignment and mobility in harsh environments, which paves the way for future field applications.
CitationSun, X., Kong, M., Alkhazragi, O., Telegenov, K., Ouhssain, M., Sait, M., … Ooi, B. S. (2020). Field Demonstrations of Wide-beam Optical Communications through Water–Air Interface. IEEE Access, 1–1. doi:10.1109/access.2020.3020878
SponsorsThis work was supported by the King Abdullah University of Science and Technology (KAUST), BAS/1/1614-01-01, KCR/1/2081-01-01, KCR/1/4114-01- 01, GEN/1/6607-01-01, and FCC/1/1973-27-01. The authors also thank Mr. Nabeel M. Moamenah and the team at Residential & Facilities Operations, KAUST, for providing support for the Red Sea canal deployment.
Except where otherwise noted, this item's license is described as This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.
Showing items related by title, author, creator and subject.
Laser-based visible light communications and underwater wireless optical communications: a device perspectiveShen, Chao; Alkhazragi,Omar; Sun, Xiaobin; Guo, Yujian; Ng, Tien Khee; Ooi, Boon S. (Novel In-Plane Semiconductor Lasers XVIII, SPIE-Intl Soc Optical Eng, 2019-03-01) [Conference Paper]High-speed visible light communications (VLC) has been identified at an essential part of communication technology for 5G network. VLC offers the unique advantages of unregulated and secure channels, free of EM interference. Compared with the LED-based VLC transmitter, laser-based photonic systems are promising for compact, droop-free, and high-speed white lighting and VLC applications, ideal for ultra-fast 5G network and beyond. Besides the potential for achieving high data rate free-space communication links, i.e. the Li-Fi network, laser-based VLC technology can also enable underwater wireless optical communications (UWOC) for many important applications. In this paper, the recent research progress and highlights in the fields of laser-based VLC and UWOC have been reviewed with a focused discussion on the performance of various light sources, including the modulation characteristics of GaNbased edge emitting laser diodes (EELDs), superluminescent diodes (SLDs) and vertical-cavity surface-emitting lasers (VCSELs). Apart from the utilization of discrete components for building transceiver in VLC systems, the development of III-nitride laser-based photonic integration has been featured. Such on-chip integration offers many advantages, including having a small-footprint, high-speed, and low power consumption. Finally, we discuss the considerations of wavelength selection for various VLC and UWOC applications. Comparison of infrared (IR) and visible lasers for channels with high turbulence and the study of ultraviolet (UV) and visible lasers for non-line-of-sight (NLOS) communications are presented.
Underwater wireless optical communications: Opportunity, challenges and future prospects commentary on “Recent progress in and perspectives of underwater wireless optical communication”Ooi, Boon S.; Kong, Meiwei; Ng, Tien Khee (Progress in Quantum Electronics, Elsevier BV, 2020-07-28) [Article]
Communication Through Breath Using Molecular Communication Modeling in Indoor EnvironmentsAlmayouf, Nojood (2019-11) [Thesis]
Advisor: Alouini, Mohamed-Slim
Committee members: Alouini, Mohamed-Slim; Al-Naffouri, Tareq Y.; Amin, Osama; Dahrouj, HayssamThe concept of communication via breath is introduced under the molecular com munication system, where data can be exchanged through inhalation and exhalation. Those data are carried by volatile organic compounds (VOCs) or pathogens and transferred through an aerosol channel. In this thesis, we propose a molecular com munication model for an instantaneous source in a bounded indoor environment. The walls of this environment could be reﬂectors and/or absorbers by adjusting the value of deposition velocity. We assume a puﬀ source in a given location and study the per formance of a point source since it is the basic element that can be used to derive the concentration of breath, cough, and sneezing, where the concentration of continuous source can be found by integrating a point source over space and time domains. Also, we show some numerical results to visualize the performance of these mathematical models and evaluate them. As a case study, we consider a real-life scenario of detecting a virus from an exhaled breath of a person standing in an indoor bounded room with reﬂective and absorptive walls. We derive the spatial-temporal concentration of an exhaled virus at the molecules source and the receiver in the room. Finally, we study the probability of misdetection using a suitable bio-sensor.