High-Speed Reconfigurable Free-Space Optical Interconnects with Carrierless-Amplitude-Phase Modulation and Space-Time-Block Code

Wang, Ke; Lim, Christina; Wong, Elaine; Alameh, Kamal; Kandeepan, Sithamparanathan; Skafidas, Efstratios

doi:10.1109/jlt.2018.2881728

Cited by 10 publications

(2 citation statements)

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“…Therefore, this capability of the system can be perceived in terms of SNR coding gain (G), which is defined as the ratio of the SNR needed without coding over the one with coding (G = SNR uncoded /SNR coded ) for a given BER [18]. A variety of ECCs are available in the literature [2,20,34], and they are characterized by the G, where a high G means good error correction capability. In this paper, we exploit Reed-Solomon (RS) ECCs of different codeword lengths to illustrate the effect of coding on the FSOI system BD.…”

Section: Bandwidth Density Of Coded Fsoi Systemmentioning

confidence: 99%

“…This makes the systems particularly suitable for applications that demand rapid and efficient data communication, such as high-performance computing, cloud computing, and data centers. By leveraging FSOIs, organizations can effectively handle the increasing data requirements of the modern digital landscape [2]. Another advantage of FSOIs is the low interference susceptibility.…”

Section: Introductionmentioning

confidence: 99%

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Bandwidth Density Analysis of Coded Free-Space Optical Interconnects

Aldiabat,

Al-Ababneh,

Alqudah

2023

Electronics

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The performance of free-space optical interconnects (FSOIs) system is significantly influenced by noise, similar to any wireless communication system. This noise has a notable impact on both the bandwidth density and data rate of FSOIs system. To address these challenges, this study proposes the utilization of vertical-cavity-surface-emitting laser (VCSEL) arrays on the transmitter side and photodetector arrays on the receiver side for FSOIs. The study investigates the bandwidth density of the system with and without coding while maintaining a specific bit error rate. An analysis is conducted in the presence of higher-order modes in the laser beams of the FSOIs system and a fundamental Gaussian operating mode. The presence of the higher-order modes leads to degradation in the performance of the FSOIs system in terms of bandwidth density. In addition, we examine the impact of the signal-to-noise ratio (SNR) on the system’s bandwidth density for each considered operating mode. The provided simulation results clearly demonstrate that coding significantly enhances the bandwidth density of the systems, with the extent of improvement being closely tied to the employed code rate and codeword length.

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