A Tb/s Indoor Optical Wireless Backhaul System Using VCSEL Arrays

Kazemi, Hossein; Sarbazi, Elham; Soltani, Mohammad; Safari, Majid; Haas, Harald

doi:10.1109/pimrc48278.2020.9217368

Cited by 25 publications

(25 citation statements)

References 32 publications

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“…Progress in VCSEL technology has also led to many FSO sources that could be modulated independently on a single chip [119]. There are also various designs of photodetector arrays [120]. Newly developed photonic antennas can be incorporated to extend the field of view of high-speed optical detectors [121].…”

Section: Mimo Hybrid Rf/fsomentioning

confidence: 99%

Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology

Trichili¹,

Ragheb

Briantcev

et al. 2021

IEEE Open J. Commun. Soc.

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Progress in optical wireless communication (OWC) has unleashed the potential to transmit data in an ultrafast manner without incurring large investments and bulk infrastructure. OWC includes wireless data transmissions in three optical sub-bands; ultraviolet, visible, and infrared. This paper discusses installing infrared OWC, known as free space optics (FSO), systems on top of installed radio frequency (RF) networks for outdoor applications to benefit from the reliability of RF links and the unlicensed broad optical spectrum, and the large data rates carried by laser beams propagating in free space. We equally review commercially available solutions and the hardware requirements for RF and FSO technology co-existence. The potential of hybrid RF/FSO for space communication is further discussed. Finally, open problems and future research directions are presented.

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Section: Mimo Hybrid Rf/fsomentioning

confidence: 99%

Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology

Trichili¹,

Ragheb

Briantcev

et al. 2021

IEEE Open J. Commun. Soc.

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“…Depending on the bias current, the VCSEL output beam profile can be Gaussian Gaussian [20], [21], [22]. The geometrical representation of the Gaussian beam is shown in Fig.…”

Section: A Gaussian Beammentioning

confidence: 99%

“…For the bestcase scenario, it is assumed that all the beams are utilizing different wavelengths, which should be perfectly distinguished by the optical receiver. Therefore, the system is noise limited as ICI is completely avoided and the signal to interferenceplus-noise ratio (SINR) is represented as shown in (22). Hence, the average data rate of the central beam can be written as:…”

Section: B System With Multiple Usersmentioning

confidence: 99%

A VCSEL Array Transmission System With Novel Beam Activation Mechanisms

Zeng¹,

Soltani²,

Safari³

et al. 2022

IEEE Trans. Commun.

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Optical wireless communication (OWC) is considered to be a promising technology which will alleviate traffic burden caused by the increasing number of mobile devices. In this study, a novel vertical-cavity surface-emitting laser (VCSEL) array is proposed for indoor OWC systems. To activate the best beam for a mobile user, two beam activation methods are proposed for the system. The method based on a cornercube retroreflector (CCR) provides very low latency and allows real-time activation for high-speed users. The other method uses the omnidirectional transmitter (ODTx). The ODTx can serve the purpose of uplink transmission and beam activation simultaneously. Moreover, systems with ODTx are very robust to the random orientation of a user equipment (UE). System level analyses are carried out for the proposed VCSEL array system. For a single user scenario, the probability density function (PDF) of the signal-to-noise ratio (SNR) for the central beam of the VCSEL array system can be approximated as a uniform distribution. In addition, the average data rate of the central beam and its upper bound are given analytically and verified by Monte-Carlo simulations. For a multi-user scenario, an analytical upper bound for the average data rate is given. The effects of the cell size and the full width at half maximum (FWHM) angle on the system performance are studied. The results show that the system with a FWHM angle of 4 • outperforms the others.

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“…High-speed and high-brightness vertical-cavity surfaceemitting lasers (VCSELs) have plentiful applications nowadays. It has been suggested that such VCSEL arrays can be used as the light source in optical wireless communication (OWC) channels, one possible solution for development of the next generation of wireless communication systems for 5G, 6G and satellite communications [1,2]. A Space-Comm.…”

Section: Introductionmentioning

confidence: 99%

High-Brightness, High-Speed, and Low-Noise VCSEL Arrays for Optical Wireless Communication

Khan

Chang

Pan³

et al. 2022

IEEE Access

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The development of high-speed and high-brightness vertical-cavity surface-emitting lasers (VCSELs), which can serve as an efficient light source for optical wireless communication (OWC), play a crucial role in growth of the next generation of wireless communication networks, e.g., 6 G and satellite communications. In this work, by optimizing the size of the Zn-diffusion and oxide-relief apertures in a high-speed 850 nm VCSEL, we obtain record-high brightness (2.9 MWcm sr at 10 mW output) with single polarized and (quasi-) single-mode (SM) outputs under continuous wave (CW) operation. However, such high brightness output comes at the cost of spatial hole burning (SHB) effect and degraded quality of 25 Gbit/sec eye patterns. In addition, an SM VSCEL array structure is usually needed to further boost the total available optical power for long-reach OWC. Here, a novel (quasi-) SM VCSEL array structure is demonstrated which releases the trade-off between the performances of brightness and eye-pattern quality.Our demonstrated array has a special crisscross mesa connecting neighboring VCSEL units and an extra electroplated copper substrate integrated on the backside of the chip. Compared to the reference array without the copper substrate and connected active mesas, the demonstrated array exhibits a higher (quasi-) SM output power, narrower divergence angle, larger orthogonal polarization mode suppression ratio (OPSR), and flatter E-O response. This in turn leads to smaller jitter and less noise in the measured 12.5 Gbit/sec eye-patterns. The demonstrated 7x7 array exhibits a maximum SM power of around 90 mW with a 1/e 2 divergence angle as narrow as 7 o (FWHM: 5 o ), single polarized output (10 dB OPSR), decent relative intensity noise performance (< -130 dB/Hz) and clear 12.5 Gbit/sec eye-opening. Such new device with remarkable static/dynamic performances has strong potential to further improve the product of the linking distance and data rate in the next generation of OWC channels.

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A Tb/s Indoor Optical Wireless Backhaul System Using VCSEL Arrays

Cited by 25 publications

References 32 publications

Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology

Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology

A VCSEL Array Transmission System With Novel Beam Activation Mechanisms

High-Brightness, High-Speed, and Low-Noise VCSEL Arrays for Optical Wireless Communication

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