Test results of error-free bidirectional 10 Gbps link for air-to-ground optical communications

Horwath, Joachim; Gonzalez, Dionisio Diaz; Navajas, L. Martin; Souto, Alberto Lozano; Semerjyan, Vardan; Raju, G.S.; Grabowsky, Jan; Garcia, Charles A.; Lai, Yi Fan; Bähr, Torsten; Chen, Chien‐Chung; Haque, Farhana; Grier, Andrew; Harding, H G W; Hunwardsen, M.; Booen, Eric; Hemmati, Hamid

doi:10.1117/12.2306191

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…The optical power loss caused by the atmospheric transmission (including optics loss, atmospheric attenuation, geometrical loss, and coupling loss) is primarily considered, and variable optical attenuators (VOAs) are used to simulate the practical optical power attenuation from the transmitter to the relaying node (VOA1), and from the relaying node to the receiver (VOA2). The link budget taking the static loss into account is present in Table 1, in which the atmospheric loss is designed for FSO communication between an airborne terminal (18 to 27-km altitude range) in the stratosphere and an optical ground station [24], and the geometrical loss is calculated by equation (6) [25]. where r 0 is the initial Gaussian beam radius calculated by r 0 = 10λ/πθ t , θ t is the half-angle of the beam divergence, λ is the signal wavelength and R r is the radius of the receiver optics.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations

et al. 2018

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All-optical amplify-and-forward (OAF) relaying technique can amplify and filter the attenuated optical signal in optical domain, and thus is regarded as a simple way to extend the transmission distance of free-space optical (FSO) communication systems. At the relaying node, however, the incident background radiation and the amplified spontaneous emission noise of the deployed erbium-doped fiber amplifier will deteriorate the optical signal-to-noise, therefore causing the degradation of the system's bit error ratio (BER). In this paper, we perform simulations and experiments on FSO system with on-off keying (OOK) and differential phase-shift keying (DPSK) signals, focusing on the receiving sensitivity loss (RSL) of the OAF-assisted dual-hop system. Taking the BER level of 10 −7 as the reference, we find that the DPSK system suffers more than 8 dB RSL at the data rate of 5 Gb/s in simulation, while the OOK system gets less than 1 dB RSL at the same data rate. In the following experiments, the obtained results exhibit that RSL of DPSK system is nearly 10 dB, which of OOK system is less than 1.5 dB, shown similarly property to the simulations.

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Section: Simulation and Experimental Resultsmentioning

confidence: 99%

Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations

et al. 2018

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“…The communication rate reached 10 Gb/s, and the communication distance was 9 km. This experimental result clearly shows that factors such as the fast flight of the airborne platform, the uncertain trajectory, and random errors from attitude changes cause significant difficulties in the short and stable establishment of the laser link [5].…”

Section: Air-to-ground Optical Communicationsmentioning

confidence: 89%

Research Progress of High-Speed Data Transmission Technology for Lightweight and Small-Sized Unmanned Aerial Vehicle Platforms

Jiang,

Bai,

et al. 2024

Applied Sciences

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With the continuous development of science and technology, UAV technology has been widely used in various fields. As an essential part, light and small UAV platforms have the advantages of being small, lightweight, and easy to operate and thus have been widely used in aerial photography, monitoring, rescue, and other fields. However, the traditional data transmission method can no longer meet the demand for the data transmission speed and stability of small and light UAV platforms. Wireless optical communication has the advantages of being high-speed and license-free, as well as having a large bandwidth strong anti-interference ability, and good confidentiality. Therefore, this paper aims to study high-speed data transmission technology for light and small UAV platforms to improve their transmission speed and stability. In this paper, the characteristics and advantages of UAV airborne laser communication are first elaborated to illustrate the advancements and importance of data transmission technology based on light and small UAV platforms. Then, the composition of a UAV airborne laser communication system is clarified to illustrate the feasibility of conducting airborne laser communication research. Then, the current domestic and international research status of people on light and small UAV airborne laser communication high-speed data transmission systems is reviewed, and its key technical features are analyzed. Finally, the prospects for its application and development trend are investigated.

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“…By transmitting 1.25 Gbps signals to a ground station, it was demonstrated that stratospheric FSO transmission can be achieved error-free. This claim was further asserted in [42], where the authors refer to Facebook's demonstration of a 10 Gbps bidirectional optical link between a HAP terminal and a ground station, which achieved error-free transmission.…”

Section: High Altitude Platforms (Haps)mentioning

confidence: 94%

A Comprehensive Review of UAV-Assisted FSO Relay Systems

Nzekwu,

Fernandes,

Fernandes

et al. 2024

Photonics

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The evolving requirements of next-generation mobile communications networks can be met by leveraging vertically deployed Unmanned Aerial Vehicle (UAV) platforms integrated with Free Space Optical communications (FSO). This integration offers a flexible and scalable architecture capable of delivering high-rate communication without requiring licenses while aligning with the multi-gigabit paradigm. In recent times, the increasing availability of commercial aerial platforms has facilitated experimental demonstrations of UAV-enabled FSO systems, which play a crucial role in proposed backhaul networks and point-to-point communications by overcoming Line-of-Sight (LOS) challenges. These systems can be rapidly deployed to meet sudden demand scenarios. This document provides a comprehensive review of relevant field demonstrations of UAV-enabled FSO relay systems, with a particular focus on commercially available, free-flying platforms that are driving advancements in this domain. It categorizes the different platforms by considering the operational altitudes of these systems and their payload actuation capacity, which determines their adaptability to variables. The analysis aims to distill the design considerations that lead to optimal performance regarding communications throughput and other relevant metrics. Moreover, it also attempts to highlight areas where design choices have fallen short, indicating gaps in current research efforts toward the widespread adoption of UAV-enabled FSO relay systems. Finally, this work endeavors to outline effective design considerations, guidelines, and recommendations to bridge these identified gaps. It serves as a valuable reference guide for researchers involved in developing UAV-enabled FSO relay systems, enabling them to make informed decisions and pave the way for the successful implementation of such systems.

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Test results of error-free bidirectional 10 Gbps link for air-to-ground optical communications

Cited by 6 publications

References 3 publications

Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations

Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations

Research Progress of High-Speed Data Transmission Technology for Lightweight and Small-Sized Unmanned Aerial Vehicle Platforms

A Comprehensive Review of UAV-Assisted FSO Relay Systems

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