VCSEL-Based 24 Gbit/s OWC Board-to-Board System

Cossu, G.; Ali, Wajahat; Rannello, M.; Ertunc, Ezgi; Gilli, L.; Sturniolo, Alessandro; Messa, A.; Ciaramella, E.

doi:10.1109/lcomm.2019.2924628

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…We adopt discrete multi-tone (DMT) modulation with adaptive bit-and-power-loading to maximise the achievable data rate of the OWC link. We have obtained 38 Gbps at a link distance of 2.5 m, which is about a 50% increase in the data rate compared to the work in [8] and [11]. Based on the analysis in [10], when spatial division multiplexing is considered, a 5×5 array based on such VCSELs can potentially achieve Tbps communications.…”

Section: Introductionmentioning

confidence: 81%

“…Due to their vertical emission and ease of fabrication, VC-SELs can be monolithically integrated into two-dimensional (2D) arrays for spatial diversity and multiple-input multipleoutput (MIMO) OWC systems. Experimental works on gigabit OWC were implemented with individual VCSEL sources at wavelengths of 650 nm [6], 850 nm [7], and 1310 nm [8] with data rates of up to 25 Gbps.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Demonstration of 38 Gbps Over 2.5 m OWC Systems With Eye-Safe 850 nm SM-VCSELs

Osahon,

Rajbhandari,

Kostakis

et al. 2024

IEEE Photon. Technol. Lett.

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With a directly modulated 850 nm single-mode vertical cavity surface emitting laser (SM-VCSEL), we experimentally achieve a gross data rate of ∼38 Gbps over a 2.5 m optical wireless communication (OWC) link at the 7% Reed-Solomon forward error correction (RS-FEC) limit. The OWC link is demonstrated using an eye-safe transmitted optical power of -1.47 dBm and discrete multi-tone (DMT) modulation with adaptive bit-and-power loading. The SM-VCSEL has a relative intensity noise (RIN) of ∼-137 dB/Hz, which is lower than that of a typical commercial 850 nm multimode VCSEL (∼-129 dB/Hz). Therefore, under almost identical OWC link operating conditions, the SM-VCSEL provides a gross data-rate increase of ∼19 Gbps and an optical signal-to-noise-ratio (SNR) gain of ∼5 dB compared to its multimode counterpart having a similar modulation bandwidth. Furthermore, we demonstrate an errorfree net data rate of ∼17 Gbps at a received optical power of -7 dBm, which suggests the feasibility of utilising the SM-VCSEL to realise indoor gigabit OWC applications.

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration of 38 Gbps Over 2.5 m OWC Systems With Eye-Safe 850 nm SM-VCSELs

Osahon,

Rajbhandari,

Kostakis

et al. 2024

IEEE Photon. Technol. Lett.

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“…A wide range of different OWC systems can be designed to transmit signals of various data rates, over different link distances, in various environments, according to the application. As an example, high data-rate links (tens of Gb/s) use a collimated laser beam and line-of-sight (LoS) between transmitter (TX) and receiver (RX) [20]- [22].…”

Section: Introductionmentioning

confidence: 99%

Optical Wireless Communication in an Avionics Test Facility for Spacecrafts

Gilli,

Cossu,

Vincenti

et al. 2024

IEEE Sensors J.

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We explore the evident benefits of introducing a new wireless technology in assembly integration and test (AIT), which is a key and demanding phase when commissioning a satellite. Namely, for the first time, we successfully tested an optical wireless communication (OWC) system in a real AIT room, demonstrating that it can effectively provide wireless transmission among the different units of a spacecraft and the test equipment. This environment is extremely challenging because it does not allow line-of-sight among the different units: as a result, OWC relies heavily on the diffuse illumination of the ceiling and the following light scattering.In addition to that, those test rooms present a strong ambient light that can reduce the transmission performance. The proposed system employs new OWC transceivers that we designed, realized, and optimized for this scenario. They adapt the native MIL-STD-1553B standard to the OWC transmission and vice versa, without any modification of the protocol. They effectively realize an OWC transparent connection, replacing the cabled connections with significant improvements in working time and costs. Mostly, they imply no modification of the existing protocol. The system is thoroughly tested by optical and communication measurements; to this aim, we emulated the usual communication measurements, placing the realized transceivers over a workbench for avionic tests. All tests showed no errorand large system margins. These results prove that the OWC technology has a great potential for practical AIT applications, in the near future: this can also open the way to the wide deployment of the technology in real spacecrafts.

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“…High-speed links (tens of Gbit/s) need high directionality of the light beam, and they were successfully implemented by means of a laser as the optical source. [10][11][12] On the other hand, lower rate (tens of Mbit/s) OWC systems can also use very diverging beams, even exploiting reflections/scattering from the walls. These configurations usually use Light Emitting Diodes (LEDs) as optical sources.…”

Section: Introductionmentioning

confidence: 99%

Optical wireless interfaces for the MIL-STD 1553 bus

Gilli,

Cossu,

Vincenti

et al. 2023

International Conference on Space Optics — ICSO 2022

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The MIL-STD-1553B is one of the most used data buses for communication over aircraft and satellites. It requires a large amount of cables to connect all the onboard devices, therefore one of the most challenging issues in Spacecrafts (SCs) design is how to arrange all of them. Moreover, these wired communication systems represent up to 10% of the total mass of the satellite, introducing constraints on the cost of the mission launch and reducing the available room inside the satellite. We present here a novel system that can transport the MIL-STD-1553B signal over optical wireless, effectively removing wired connections. This can save weight and space while maintaining high performance and backward compatibility. We achieved these results by developing an innovative transceiver (TRX) board. The presented Optical Wireless Communication (OWC) system does not suffer from sniffing/jamming or from multipath interference. Moreover, it encompasses only Commercial Off-the-Shelf (COTS) components, so that no special technological development is needed and we can keep its cost low. Here, we first shortly summarize our approach and then discuss how it can be used to deploy OWC links over a SC. To this aim, our system can interface the MIL-STD-1553B data bus with the OWC devices without any modification of the protocol and of the bus architecture.

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VCSEL-Based 24 Gbit/s OWC Board-to-Board System

Cited by 7 publications

References 22 publications

Experimental Demonstration of 38 Gbps Over 2.5 m OWC Systems With Eye-Safe 850 nm SM-VCSELs

Experimental Demonstration of 38 Gbps Over 2.5 m OWC Systems With Eye-Safe 850 nm SM-VCSELs

Optical Wireless Communication in an Avionics Test Facility for Spacecrafts

Optical wireless interfaces for the MIL-STD 1553 bus

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