Feedforward Equalizers for MDM–WDM in Multimode Fiber Interconnects

Masunda, Tendai; Amphawan, Angela

doi:10.1515/joc-2016-0037

Cited by 6 publications

(5 citation statements)

References 53 publications

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“…Although the LMS algorithm has a low computational complexity, its training sequence adds an overhead and thus reduces the performance of the system. Moreover, the CMA requires a suitable learning step; the equalizer converges slowly with small steps and cannot converge with large steps for accurate estimation [8].In [13], Koebele et al, discuss the use of CMA to update the equalizer coefficients, although, CMA provides low computational complexity, it has a poor performance. This is due to the instability and a slower convergence rate compared with LMS algorithm [14,15].…”

Section: Equalization Schemes In Mdm Systemmentioning

confidence: 99%

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Channel impulse response equalization scheme based on particle swarm optimization algorithm in mode division multiplexing

Yasear

Amphawan

2017

EPJ Web Conf.

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Abstract.Mode division multiplexing (MDM) technique has been introduced as a promising solution to the rapid increase of data traffic. However, although MDM has the potential to increase transmission capacity and significantly reduce the cost and complexity of parallel systems, it also has its challenges. Along the optical fibre link, the deficient characteristics always exist. These characteristics, damage the orthogonality of the modes and lead to mode coupling, causing Inter-symbol interference (SI) which limit the capacity of MDM system. In order to mitigate the effects of mode coupling, an adaptive equalization scheme based on particle swarm optimization (PSO) algorithm has been proposed. Compared to other traditional algorithms that have been used in the equalization process on the MDM system such as least mean square (LMS) and recursive least squares (RLS) algorithms, simulation results demonstrate that the PSO algorithm has flexibility and higher convergence speed for mitigating the effects of nonlinear mode coupling.

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Section: Equalization Schemes In Mdm Systemmentioning

confidence: 99%

“…To mitigate the effects of mode coupling in the MDM system, several techniques have been proposed [7,8]. However, the hardware-based equalizer cannot provide an acceptable performance with time-varying channels, due to the implementation complexity.…”

Section: Introductionmentioning

confidence: 99%

Channel impulse response equalization scheme based on particle swarm optimization algorithm in mode division multiplexing

Yasear

Amphawan

2017

EPJ Web Conf.

Self Cite

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“…The authors experimentally reported feasible transmission of 2 LP modes × 4 phase-shift-keyed optical codes × 10-Gbps on-off-keyed data streams over a 42 km fiber length using a single-mode and a multi-mode fiber without the application of dispersion compensation. T. Masunda et al proposed hybrid MDM and WDM architecture to realize high-speed MMF interconnects [24]. Six independent vertical-cavity surface-emitting laser diodes are used, where each wavelength generates three distinct Laguerre-Gaussian (LG) modes to realize 18 parallel channel transmissions.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a 4 × 20-Gbps OFDM-Based FSO Link Incorporating Hybrid W-MDM Techniques

et al. 2021

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Free space optics (FSO) has been recognized as a crucial technique to meet the high-bandwidth requirements in future wireless information transmission links. It provides a feasible solution to the last-mile bottleneck problem due to its merits that include high-speed data transportation and secure and low-latency networks. Due to these merits, FSO is a reliable technology for future health-care and biomedical services like the transmission of biomedical sensor signals. But the main limiting factor in the data transmission employing FSO links is adverse atmospheric weather conditions. This research work reports the designing and simulative evaluation of the performance of a high-speed orthogonal frequency division multiplexing–based free space optics link by incorporating wavelength division multiplexing of two independent frequency channels (193.1 THz and 193.2 THz) along with mode division multiplexing of distinct spatial laser Hermite–Gaussian modes (HG01 and HG03). Four independent 20-Gbps quadrature amplitude-modulated data signals are transported simultaneously under different atmospheric weather conditions using the proposed link. Also, the link performance has been investigated for an increasing beam divergence angle.

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“…Typically, multimode fibers using in MDM communication systems only support a relatively small number of guided modes which are thus called few-mode fibers because a large number of guided modes cause degraded signals from highorder and inter-modal dispersion issues associated with nonlinear effects [4,5]. However, and silicon crystals in the silicon waveguide, hybrid WDM-MDM systems are still able to apply for short-haul optical communication systems [6][7][8][9] and optical interconnects [10][11][12] thanks to the support of advanced dispersion compensation techniques [13,14]. Basically, technology developers typically use graded-index fibers optimized for minimum differential modal group delay (DMGD) because such fibers allow the use of simpler receiver technology.…”

Section: Introductionmentioning

confidence: 99%

A compact 1×3 two-mode selective silicon photonic router/switch using two tunable phase shifters

Duy¹,

Truong²,

Bac³

et al. 2021

EAI Endorsed Transactions on Industrial Networks and Intelligen

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In this work, we propose a design in the proof-of-concept of a 1×3 two-mode selective silicon-photonics router/switch. The proposed device composes of a Y-junction coupler, two multimode interference (MMI) couplers, and two phase-shifters on the silicon-on-insulator (SOI) rib waveguides. The input modes of TE 0 and TE 1 can be arbitrarily and simultaneously routed to the yearning output ports by setting appropriate values (ON/OFF) for two tunable phase shifters (PSs). The structural optimization and efficient characterization processes are carried out by numerical simulation via three-dimensional beam propagation method. The proposed device exhibits the operation ability over the C-band with good optical performances in terms of insertion loss smaller than 1 dB, crosstalk under -19 dB, and relatively large geometry tolerances. Moreover, the proposed device can integrate into a footprint as compact as 5 µm × 475 µm. Such significant advantages are beneficial and promising potentials for very large-scale photonic integrated circuits, high-speed optical interconnects, and short-haul few-mode fiber communication systems.

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Feedforward Equalizers for MDM–WDM in Multimode Fiber Interconnects

Cited by 6 publications

References 53 publications

Channel impulse response equalization scheme based on particle swarm optimization algorithm in mode division multiplexing

Channel impulse response equalization scheme based on particle swarm optimization algorithm in mode division multiplexing

Performance Evaluation of a 4 × 20-Gbps OFDM-Based FSO Link Incorporating Hybrid W-MDM Techniques

A compact 1×3 two-mode selective silicon photonic router/switch using two tunable phase shifters

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