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Optical Communication and Information Technology
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Optical Communication and Information Technology

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Multidisciplinary Applications".

Deadline for manuscript submissions: closed (10 September 2023) | Viewed by 9822

Special Issue Editors

Prof. Dr. Mario Martinelli

E-Mail Website
Guest Editor
Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milano, Italy
Interests: optical communications; optical signal processing and switching; information transmission; thermodynamics; statistical mechanics; the second law of thermodynamics; reversibility and quantum mechanics; Shannon entropy; Kullback–Leibler divergence; channel capacity
Prof. Dr. Pierpaolo Boffi

E-Mail Website
Guest Editor
Department of Electronics, Information and Bioengineering, Politecnico di Milano via Ponzio, 34/5, 20133 Milan, Italy
Interests: optical communications; fiber propagation; WDM; SDM; PON; access; high capacity systems; metro networks

Special Issue Information

Dear Colleagues,

Optical communications are continually evolving in order to enable evolution towards the so-called Fiber-To-The-Everywhere/Everything, supporting a huge capacity for a large range of applications and any kind of services. New photonic networks, systems and technologies are also being explored to assure sustainability in terms of cost, power consumption and footprint. Optical communications use photons to transmit information and the connection between photons and bits (or between optical communications and information theory) opens new frontiers of investigation that cross the domains of thermodynamics and quantum mechanics. Optical fibers, the preferred transmission medium for optical communications, are also transducers of numerous physical and environmental quantities and open up the possibility of an intersection between optical communications and optical fiber sensors. This Special Issue will address the emerging and innovative solutions proposed for the next generation of optical communications, information technologies, and optical fiber sensors, for example:

  • Ultra-high speed data rate per carrier, ultra-wide band (S, C and L band) and complex modulation formats, shaping and coding to face the continuous bandwidth increasing in transport, access and datacenter networks;
  • New few-mode and multi-core fibers to exploit space-division multiplexing and hollow core fibers for innovative communication scenarios;
  • Future PON solutions to range from FTTH, to enterprise infrastructures, IoT, and Industry 4.0;
  • High-capacity flexible metropolitan area networks providing low latency and high reliability;
  • Fixed and mobile convergence to support mobile transport in terms of backbone, backhaul, and fronthaul;
  • Data center interconnections assuring ultrahigh throughput connectivity;
  • Optical wireless, free space optics, and Li-WI allowing fiber to the desktop, and fiber to the machine;
  • Low-cost photonic information technologies providing smart transceivers, simplified coherent detection, and low power consumption digital signal processing;
  • Thermodynamics of the information and qu-bit optical communications: principles and prospects;
  • Quantum key distribution, QKD, network management and applications;
  • Interaction between the QKD plane, the key-manager plane and the optical transport network, OTN, plane and the IP plane;
  • Fiber optic sensor network and use of existing optical communication networks as sensors of physical and environmental parameters.

Prof. Dr. Mario Martinelli
Prof. Dr. Pierpaolo Boffi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Entropy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • optical communications
  • fiber transmission
  • WDM
  • transport network
  • PON
  • DCI
  • FTTH
  • MAN
  • FSO
  • few-mode fiber
  • multi-core fiber
  • SDM
  • quantum communications
  • QKD

Published Papers (3 papers)

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Research

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17 pages, 795 KiB  
Article
The Trade-Offs between Optimality and Feasibility in Online Routing with Dedicated Path Protection in Elastic Optical Networks
by Ireneusz Olszewski and Ireneusz Szcześniak
Entropy 2022, 24(7), 891; https://doi.org/10.3390/e24070891 - 29 Jun 2022
Viewed by 1198
Abstract
The article discusses an online problem of routing and spectrum allocation with dedicated path protection in elastic optical networks. We propose three novel algorithms to solve this problem. The first of them is the minimum-cost–maximum-flow heuristic algorithm, which calculates the solution assuming that [...] Read more.
The article discusses an online problem of routing and spectrum allocation with dedicated path protection in elastic optical networks. We propose three novel algorithms to solve this problem. The first of them is the minimum-cost–maximum-flow heuristic algorithm, which calculates the solution assuming that the spectrum units on the working and dedicated backup path are the same. Such an assumption, on the one hand, increases the bandwidth blocking probability; however, on the other hand, it enables a simple, cheap and fast way to connect customers to the network during the implementation phase of elastic optical networks. The next two algorithms, which determine the exact solutions, are based on the branch and bound method. The first calculates the working and dedicated backup paths with the minimum total occupied bandwidth, called the total cost, while the second calculates the paths with the minimum total length. These algorithms enable the performance evaluation of the proposed heuristic algorithm and provide the answer as to what should be optimized, the total cost or the total length of paths, in order to minimize the bandwidth blocking probability. Extensive simulation research has shown that the proposed heuristic algorithm can be used in elastic optical networks, but with a small network load. Moreover, it is shown that the optimization of the total cost of paths provides a slightly lower blocking probability than the optimization of the total length of paths. Full article
(This article belongs to the Special Issue Optical Communication and Information Technology)
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Review

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55 pages, 42446 KiB  
Review
A Survey of Hybrid Free Space Optics (FSO) Communication Networks to Achieve 5G Connectivity for Backhauling
by Omar Aboelala, It Ee Lee and Gwo Chin Chung
Entropy 2022, 24(11), 1573; https://doi.org/10.3390/e24111573 - 31 Oct 2022
Cited by 18 | Viewed by 3508
Abstract
Increased capacity, higher data rate, decreased latency, and better service quality are examples of the primary objectives or needs that must be catered to in the near future, i.e., fifth-generation (5G) and beyond. To fulfil these needs, cellular network design must be drastically [...] Read more.
Increased capacity, higher data rate, decreased latency, and better service quality are examples of the primary objectives or needs that must be catered to in the near future, i.e., fifth-generation (5G) and beyond. To fulfil these needs, cellular network design must be drastically improved. The 5G cellular network design, huge multiple-input multiple-output (MIMO) technology, and device-to-device communication are all highlighted in this comprehensive study. Hence, free-space optics (FSO) is a promising solution to address this field. However, FSO standalone is insufficient during turbulent weather conditions. FSO systems possess some limitations, such as being able to be disturbed by any interference between sender and receiver such as a flying bird and a tree, as it requires line-of-sight (LOS) connectivity. Moreover, it is sensitive to weather conditions; the FSO performance significantly decreases in bad weather conditions such as fog and snow; those factors deteriorate the performance of FSO. This paper conducts a systematic survey on the existing projects in the same area of research such as the hybrid FSO/Radio frequency (RF) communication system by listing each technique used for each model to achieve optimum performance in terms of data rate and Bit Error Rate (BER) to be implemented in 5G networks. Full article
(This article belongs to the Special Issue Optical Communication and Information Technology)
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21 pages, 1851 KiB  
Review
Advances in Chip-Based Quantum Key Distribution
by Qiang Liu, Yinming Huang, Yongqiang Du, Zhengeng Zhao, Minming Geng, Zhenrong Zhang and Kejin Wei
Entropy 2022, 24(10), 1334; https://doi.org/10.3390/e24101334 - 22 Sep 2022
Cited by 17 | Viewed by 3936
Abstract
Quantum key distribution (QKD), guaranteed by the principles of quantum mechanics, is one of the most promising solutions for the future of secure communication. Integrated quantum photonics provides a stable, compact, and robust platform for the implementation of complex photonic circuits amenable to [...] Read more.
Quantum key distribution (QKD), guaranteed by the principles of quantum mechanics, is one of the most promising solutions for the future of secure communication. Integrated quantum photonics provides a stable, compact, and robust platform for the implementation of complex photonic circuits amenable to mass manufacture, and also allows for the generation, detection, and processing of quantum states of light at a growing system’s scale, functionality, and complexity. Integrated quantum photonics provides a compelling technology for the integration of QKD systems. In this review, we summarize the advances in integrated QKD systems, including integrated photon sources, detectors, and encoding and decoding components for QKD implements. Complete demonstrations of various QKD schemes based on integrated photonic chips are also discussed. Full article
(This article belongs to the Special Issue Optical Communication and Information Technology)
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