Abstract In this paper, a dense wavelength division multiplexing - passive optical network (DWDM-PON) architecture was designed using vertical cavity surface emitting laser (VCSEL) arrays for mode division multiplexing (MDM) of Laguerre-Gaussian (LG) modes LG12, LG15. LG18, LG111 and LG114. A data rate of 25Gbit/s has been achieved at a central wavelength 1550.12 nm with a spacing of 1.6 nm. Transmission performance was compared for multimode fiber (MMF) lengths of 200 m to 1 km. The modal performance has been evaluated using spatial electric field, electric signal, eye diagram and bit-error-rates (BER).
#1Yousef Fazea(UUM: Universiti Utara Malaysia)H-Index: 10
Abstract Mode Division Multiplexing (MDM) increases aggregate capacity and improves spectral efficiency when used with wavelength division multiplexing (WDM). This paper numerically simulate the modal analysis and bit-error-rate (BER) evaluation of a new MDM architecture using concentric multi-diameter ring vortices in a multimode fibre (MMF) backbone. The study achieved a data rate of 40 Gbit/s for the MDM system on wavelength 1550.12 nm for a MMF length of 1500 m. The performance evaluation me...
Abstract Multimode Fiber (MMF) is an established choice for the high-speed backbones in Local Area Networks (LANs). Mode Division Multiplexing (MDM) is an emerging technology utilizing modes as independent data communication channels. MDM controls the delay spread of propagating modes in order to alleviate modal dispersion, which is the principal source of bandwidth limitation in MMF. This paper critically reviews and systematically classifies recent selective mode excitation techniques for mode...
#1Yousef Fazea(UUM: Universiti Utara Malaysia)H-Index: 10
#2Angela Amphawan(UUM: Universiti Utara Malaysia)H-Index: 20
In the contest to improving optical channel rates in dense wavelength multiplexing (DWDM) service to realize 40Gb/s, different adjustment and coherent detection plans are being investigated. In this paper, we present differential quaternary phase-shift keying (DQPSK) balance for the arrangement of a 32-channel DWDM in a Local Area Network (LAN).
#2Mauro Biagi(Sapienza University of Rome)H-Index: 22
Last. Gaetano Scarano(Sapienza University of Rome)H-Index: 11
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This paper presents a novel space-time recursive least-squares adaptive algorithm, which performs filter coefficients updates in space and postponed filtering in time. The algorithm is used for intersymbol interference suppression in optical camera communications, which is a subgroup of visible light communication systems. Optical camera communications uses image sensor receivers, as those available in smartphones, tablets, and laptops, to detect changes in light intensity in order to allow data...
#1Angela Amphawan(MIT: Massachusetts Institute of Technology)H-Index: 20
#2Yousef Fazea(UUM: Universiti Utara Malaysia)H-Index: 10
Last. Mohamed Elshaikh(UniMAP: Universiti Malaysia Perlis)H-Index: 5
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Space division multiplexing (SDM) has recently gained eminence as a means to alleviate data traffic congestion to future-proof current network infrastructure. This paper reports on SDM of a new spiral-phased wavefront comprising modified Laguerre-Gaussian (LG) and Hermite-Gaussian (HG) modes on a wavelength of 1550.12 nm over a 2 km-long MMF. Power coupling coefficients, degenerate mode group delays and bit-error rates are analyzed for different vortex orders.
Wavelength-division multiplexed-passive optical network (WDM-PON) is a revolutionary high-capacity and scalable broadband access network. This paper capitalizes on Laguerre–Gaussian (LG) modes to reduce modal dispersion and increase data capacity.A data rate of 25 Gbit/s is attained for a multimode fiber link by multiplexing five LG modes on five wavelengths centered at 1,550.12 nm for a distance up to 800 m.
Data centers are referred to as the brain of the Internet.In data centers, multimode fiber is typically used to ensure scalability and reliability. Due to the continuous growth of Internet users which demands increasing data capacity, mode division multiplexing (MDM) presents itself as a potential candidate for providing an additional degree of multiplexing freedom through the propagation of distinct channels on different fiber modes.This paper investigates the effects of launching a spot mode w...
Abstract Optical fiber tendencies are pushing for changes towards upgrading scalability, agility, and unwavering quality for multi-hungry bandwidth applications. In the quest for future proof of those multi-hungry bandwidth applications, is vital to take advantage of new multiplexing technologies as the surge of network traffic that soon will overwhelm the capacity of multimode fiber (MMF). Due to the issue of MMF modal dispersion and mode coupling that caused Intersymbol Interference (ISI) whic...
Last. Suki Arif(UUM: Universiti Utara Malaysia)H-Index: 5
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The increased number of computers, enlarged network bandwidth, more powerful computers, consumed resources and the acceptance of the Internet has driven the ongoing demand for new and better ways to execute huge problems in shared computing infrastructure such as grid and P2P computing. Resource discovery is extremely significant and challenging issues in Grid and P2P. It is complex because resources are heterogeneous, dynamic, geographically distributed, manageability and autonomous. A well-org...
Last. Yousef Fazea(UUM: Universiti Utara Malaysia)H-Index: 10
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Classical scheduling mechanisms don’t satisfy the requirements for the end user, especially if the number of the jobs has increased massively in grid computing environment. To meet the expectations for non-trivial applications, the efficiency of the system has to be improved and the resources have to be ultimately utilized. Thus, backfilling technique becomes highly required due to its efficiency in exploiting the resources by filling the gaps that was created in the scheduler by short jobs. The...
The tremendous growth of today’s Internet traffic has launched new challenges in present IP Internet architecture. Similar content called again and again that creates a large amount of Internet traffic. There is a need to implement an efficient architecture to handle this problem. It is necessary to reduce the content redundancy to make Internet architecture efficient. Now the new research is introducing about the converting of IP host-based architecture Information-based. The Internet tradition...
Last. Adib Habbal(UUM: Universiti Utara Malaysia)H-Index: 9
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Software Defined Networks is an emerging paradigm in Internet communication world that increases the flexibility of today’s networks by decoupling control plane and data plane of the network devices. The fundamental aim is to centralize the control and reduce the complexity of the networks. The communication medium between control and data plane is through OpenFlow protocol, an open standard network protocol designed to manage the network traffic by software programs. To increase the scalability...
The ever increasing need for grid systems in scientific, business and “what if” real world types of applications, coupled with the dynamic nature of computing infrastructure, has necessitated the need for clear distinctions between the various types of grid systems. This is particularly important when evaluating real-life applications using simulation environments. The very knowledge of what simulation environment to use in evaluating the performances of different types of grid models will go a ...
The Information-centric Networks (ICN), an important research direction of the future Internet architecture, has gained lot of attention from the research community. The aim is to improve the current Internet with a new architecture where the design is completely based on information instead of the host. The information is named and is called as Named Data Object (NDO), utilized for data registration and name resolution, and the system that translates the object identifiers to network address is...
Most of the services used by Internet consumers such as social network platforms, video-on-demand, on-line gaming, web Media, and IP Television which are content-centric in nature; meaning they focus on named content objects instead of being focused on the host-location. In this context, many projects around named data propose redesigning and developing the communication of Internet-based on named data. NDN (Named Data Networking) is an ideal solution to achieve efficient data sharing and retrie...