Crosstalk in misaligned free space optical interconnects: modelling and simulation

Al-Ababneh, Nedal

doi:10.11591/ijece.v9i3.pp1620-1629

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…Diffraction induced crosstalk represents the second source of crosstalk which arises due to light diffraction from other VCSELs through other micro lenses to the active detector. In this case crosstalk can be obtained from the following (22):…”

Section: Crosstalk Calculationmentioning

confidence: 99%

“…In [21] the use of Hermite-Gaussian beams and the theory of Collins diffraction were introduced to model the optical diffractions. In [22], the generalized diffraction integral formula assuming a Laguerre-Gaussian (LG) model for the input beam was used to model crosstalk. An approximation formula for the output optical field was obtained in terms of a Int J Elec & Comp Eng ISSN: 2088-8708  sum of complex-valued Gaussian models.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of misalignment tolerance in free-space optical interconnects

Al-Ababneh,

Aldiabat

2024

IJECE

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In this paper, the use of micro lenses with non-uniform transmittance apertures as an alternative to those with uniform transmittance apertures in optical communication systems is proposed. In particular, we consider the use of micro lenses with tapered Gaussian transmittance profiles to improve the misalignment tolerance in optical interconnects. We study the effects of utilizing Gaussian transmittance profiles on the propagation of light beams and the signal to crosstalk ratio of misaligned optical systems. Moreover, we consider the use of uniform transmittance profiles in optical systems for the sake of comparison. To this end, the crosstalk optical noise is modeled at the plane of the detectors array considering the two scenarios of uniform and Gaussian apertures. This was possible after finding the optical field for both scenarios at the of the detectors array. Numerical results clearly demonstrate the significant improvement in decreasing the crosstalk and increasing the signal to crosstalk ratio in the considered optical systems upon utilizing the Gaussian profiles.

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Section: Crosstalk Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of misalignment tolerance in free-space optical interconnects

Al-Ababneh,

Aldiabat

2024

IJECE

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“…By employing these techniques, the impact of noise can be minimized, allowing for improved data transmission rates, increased link reliability, and enhanced overall system performance. For example, the author of [15] optimized the signal-to-crosstalk ratio in an FSOI system that utilized microlenses. The author considered two scenarios for optimizing the signal-to-crosstalk ratio of the system.…”

Section: Related Workmentioning

confidence: 99%

“…FSOI channels, like other wireless communication channels, are not immune to the detrimental effects of noise. Noise can degrade the performance of FSOIs systems and limit their data transmission capabilities [15]. Two primary sources of noise impact FSOI channels: channel-to-channel crosstalk and thermal noise associated with the detector amplifier.…”

Section: Introductionmentioning

confidence: 99%

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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“…Like any wireless communication channel, FSOI channels suffer from noise [15]- [17]. In this paper, we consider two main sources of noise which are the crosstalk among the channels and the detector amplifier thermal noise.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth density optimization of misaligned optical interconnects

Aldiabat

Al-Ababneh

2022

IJECE

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In this paper, the bandwidth density of misaligned free space optical interconnects (FSOIs) system with and without coding under a fixed bit error rate is considered. In particular, we study the effect of using error correction codes of various codeword lengths on the bandwidth density and misalignment tolerance of the FSOIs system in the presence of higher order modes. Moreover, the paper demonstrates the use of the fill factor of the detector array as a design parameter to optimize the bandwidth density of the communication. The numerical results demonstrate that the bandwidth density improves significantly with coding and the improvement is highly dependent on the used codeword length and code rate. In addition, the results clearly show the optimum fill factor values that achieve the maximum bandwidth density and misalignment tolerance of the system.

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Crosstalk in misaligned free space optical interconnects: modelling and simulation

Cited by 3 publications

References 12 publications

Improvement of misalignment tolerance in free-space optical interconnects

Improvement of misalignment tolerance in free-space optical interconnects

Bandwidth Density Analysis of Coded Free-Space Optical Interconnects

Bandwidth density optimization of misaligned optical interconnects

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