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Applied Sciences
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Advances in Optical Fiber Communications
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Advances in Optical Fiber Communications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 14205

Printed Edition Available!
A printed edition of this Special Issue is available here.

Special Issue Editor

Prof. Giuseppe Rizzelli

E-Mail Website
Guest Editor
Department of Electronics and Telecommunications, Polytechnic of Turin, 10129 Turin, Italy
Interests: fiber optic communications; optical networks

Special Issue Information

Dear Colleagues,

Communication technologies based on fiber optics permeate our lives, and their role is increasingly vital to the modernization and advancement of our society toward an ever fairer and more efficient access to digital resources.

Optical transmission solutions range from high-speed networks based on coherent detection and advanced modulation formats for long-haul-level communications, to networks still relying on traditional intensity modulation and direct detection receivers for short-reach communications down to intra-data center scenarios. In between, there is a whole gamut of network architectures, providing different solutions for specific applications, targeting the minimization of the cost-per-bit as a trade-off between capacity and overall implementation cost, in order for operators to cope with the increasing traffic demand while still providing reasonable market accessibility.

This Special Issue will involve original results on novel optical communication system configurations that can help the transition toward higher data rates, even at very short transmission distances below 1 km. Topics of interest for this Special Issue include but are not limited to the following research areas: 

  • Coherent optical communication employing advanced modulation format for long-haul and short reach communications;
  • Direct-detection-based long-haul and short-reach optical communication systems;
  • Novel detection schemes;
  • Multiband (C+L) optical networks;
  • Network security and quality of services for optical communication;
  • Novel optical/photonics components and silicon photonic integration;
  • New modulation and coding schemes and digital signal processing;
  • Multi-mode/few-mode fiber communication and/or equalization techniques;
  • Optical metro/access networks;
  • Data center interconnects.

Prof. Giuseppe Rizzelli
Guest Editor

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. Applied Sciences is an international peer-reviewed open access semimonthly 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 2400 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

  • fiber optic communications
  • optical networks
  • coherent detection
  • advanced modulation
  • DSP

Published Papers (6 papers)

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Editorial

Jump to: Research

2 pages, 175 KiB  
Editorial
Advances in Optical Fiber Communications
by Giuseppe Rizzelli
Appl. Sci. 2022, 12(10), 4818; https://0-doi-org.brum.beds.ac.uk/10.3390/app12104818 - 10 May 2022
Cited by 1 | Viewed by 1136
Abstract
Given the increasing importance of a globally interconnected world, driven by modern digital services and the need for fast and reliable access to digital resources, communications networks are one of the key infrastructures in today’s society [...] Full article
(This article belongs to the Special Issue Advances in Optical Fiber Communications)

Research

Jump to: Editorial

19 pages, 3725 KiB  
Article
Traffic-Based Heuristics for Regenerator Placement in Translucent Dynamic Optical Networks
by Andre L. S. de Farias, Raul C. Almeida, Jr. and Daniel A. R. Chaves
Appl. Sci. 2022, 12(9), 4388; https://0-doi-org.brum.beds.ac.uk/10.3390/app12094388 - 27 Apr 2022
Cited by 1 | Viewed by 1482
Abstract
We propose in this paper two heuristic strategies to solve the regenerator placement problem (RPP) in translucent networks under dynamic traffic. The heuristics are based on both the forecast of the offered load and estimates of blocking probabilities in the network nodes. The [...] Read more.
We propose in this paper two heuristic strategies to solve the regenerator placement problem (RPP) in translucent networks under dynamic traffic. The heuristics are based on both the forecast of the offered load and estimates of blocking probabilities in the network nodes. The proposed heuristics are compared to other regenerator placement algorithms from the literature in two different topologies. The results show that one of the proposed algorithms outperforms, in the investigated scenarios, all other algorithms from the literature considered for comparison purposes in this paper, whereas the second proposed algorithm outperforms the algorithms from the literature only in some considered scenarios. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Communications)
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11 pages, 3133 KiB  
Communication
200 Gbps/λ PON Downstream C-Band Direct-Detection Links with ≥29 dB Power Budget
by Haoyi Wang, Pablo Torres-Ferrera, Giuseppe Rizzelli, Roberto Mercinelli, Valter Ferrero and Roberto Gaudino
Appl. Sci. 2022, 12(7), 3538; https://0-doi-org.brum.beds.ac.uk/10.3390/app12073538 - 30 Mar 2022
Cited by 2 | Viewed by 1727
Abstract
In this paper we present the simulative analysis of a 200 Gbps per wavelength (λ) 8-level pulse amplitude modulation (PAM-8) downstream communication over up to 20 km single mode fiber (SMF) in C-band based on direct detection (DD) achieving at least [...] Read more.
In this paper we present the simulative analysis of a 200 Gbps per wavelength (λ) 8-level pulse amplitude modulation (PAM-8) downstream communication over up to 20 km single mode fiber (SMF) in C-band based on direct detection (DD) achieving at least a 29 dB link power budget in a PON environment. We use chromatic dispersion digital pre-compensation (CD-DPC) and a dual-arm in-phase and quadrature Mach–Zehnder modulator (IQ-MZM) at the optical line termination (OLT) side, while preserving DD in the optical network unit (ONU). Three receiver digital-signal-processing (DSP) options are analyzed and compared: square-root-like technique (SQRT) in combination with a feed forward equalizer (FFE) and a decision feedback equalizer (DFE), the Volterra nonlinear equalizer (VNLE), and the SQRT in combination with the VNLE. The SQRT can be applied in combination with the VNLE to decrease the receiver DSP complexity while maintaining the required system performance. We show that PAM-8 with CD-DPC and the SQRT in combination with the VNLE is a feasible solution for 200 Gbps per λ downstream C-band transmission for PON. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Communications)
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29 pages, 5444 KiB  
Article
Experimental Demonstration and Performance Enhancement of 5G NR Multiband Radio over Fiber System Using Optimized Digital Predistortion
by Muhammad Usman Hadi, Muhammad Awais, Mohsin Raza, Muhammad Ikram Ashraf and Jian Song
Appl. Sci. 2021, 11(24), 11624; https://0-doi-org.brum.beds.ac.uk/10.3390/app112411624 - 07 Dec 2021
Cited by 13 | Viewed by 3699
Abstract
This paper presents an experimental realization of multiband 5G new radio (NR) optical front haul (OFH) based radio over fiber (RoF) system using digital predistortion (DPD). A novel magnitude-selective affine (MSA) based DPD method is proposed for the complexity reduction and performance enhancement [...] Read more.
This paper presents an experimental realization of multiband 5G new radio (NR) optical front haul (OFH) based radio over fiber (RoF) system using digital predistortion (DPD). A novel magnitude-selective affine (MSA) based DPD method is proposed for the complexity reduction and performance enhancement of RoF link followed by its comparison with the canonical piece wise linearization (CPWL), decomposed vector rotation method (DVR) and generalized memory polynomial (GMP) methods. Similarly, a detailed study is shown followed by the implementation proposal of novel neural network (NN) for DPD followed by its comparison with MSA, CPWL, DVR and GMP methods. In the experimental testbed, 5G NR standard at 20 GHz with 50 MHz bandwidth and flexible-waveform signal at 3 GHz with 20 MHz bandwidth is used to cover enhanced mobile broad band and small cells scenarios. A dual drive Mach Zehnder Modulator having two distinct radio frequency signals modulates a 1310 nm optical carrier using distributed feedback laser for 22 km of standard single mode fiber. The experimental results are presented in terms of adjacent channel power ratio (ACPR), error vector magnitude (EVM), number of estimated coefficients and multiplications. The study aims to identify those novel methods such as MSA DPD are a good candidate to deploy in real time scenarios for DPD in comparison to NN based DPD which have a slightly better performance as compared to the proposed MSA method but has a higher complexity levels. Both, proposed methods, MSA and NN are meeting the 3GPP Release 17 requirements. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Communications)
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15 pages, 4793 KiB  
Article
Effect of Substrate Misorientation on the Structural and Optical Characteristics of In-Rich InGaAs/GaAsP Quantum Wells
by Zhiwei Li, Yugang Zeng, Yue Song, Jianwei Zhang, Yinli Zhou, Yongqiang Ning, Li Qin and Lijun Wang
Appl. Sci. 2021, 11(18), 8639; https://0-doi-org.brum.beds.ac.uk/10.3390/app11188639 - 17 Sep 2021
Cited by 5 | Viewed by 1931
Abstract
InGaAs quantum well (QW) lasers have attracted significant attention owing to their considerable potential for applications in optical communications; however, the relationship between the misorientation of the substrates used to grow InGaAs QWs and the structural and optical properties of QWs is still [...] Read more.
InGaAs quantum well (QW) lasers have attracted significant attention owing to their considerable potential for applications in optical communications; however, the relationship between the misorientation of the substrates used to grow InGaAs QWs and the structural and optical properties of QWs is still ambiguous. In this study, In-rich InGaAs/GaAsP single QWs were grown in the same run via metal organic chemical vapor deposition on GaAs (001) substrates misoriented by 0°, 2°, and 15° toward (111). The effects of substrate misorientation on the crystal quality and structural properties of InGaAs/GaAsP were investigated by X-ray diffraction and Raman spectroscopy. The 0° substrate exhibited the least lattice relaxation, and with increasing misorientation, the degree of lattice relaxation increased. The optical properties of the InGaAs/GaAsP QWs were investigated using temperature-dependent photoluminescence. An abnormal S-shaped variation of the peak energy and inverse evolution of the spectral bandwidth were observed at low temperatures for the 2° substrate, caused by the localization potentials due to the In-rich clusters. Surface morphology observations revealed that the growth mode varied with different miscuts. Based on the experimental results obtained in this study, a mechanism elucidating the effect of substrate miscuts on the structural and optical properties of QWs was proposed and verified. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Communications)
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11 pages, 4768 KiB  
Article
100 Gbaud On–Off Keying/Pulse Amplitude Modulation Links in C-Band for Short-Reach Optical Interconnects
by Oskars Ozolins, Xiaodan Pang, Aleksejs Udalcovs, Richard Schatz, Sandis Spolitis, Vjaceslavs Bobrovs, Gunnar Jacobsen and Sergei Popov
Appl. Sci. 2021, 11(9), 4284; https://0-doi-org.brum.beds.ac.uk/10.3390/app11094284 - 09 May 2021
Cited by 4 | Viewed by 2904
Abstract
We experimentally evaluate the high-speed on–off keying (OOK) and four-level pulse amplitude modulation (PAM4) transmitter’s performance in C-band for short-reach optical interconnects. We demonstrate up to 100 Gbaud OOK and PAM4 transmission over a 400 m standard single-mode fiber with a monolithically integrated [...] Read more.
We experimentally evaluate the high-speed on–off keying (OOK) and four-level pulse amplitude modulation (PAM4) transmitter’s performance in C-band for short-reach optical interconnects. We demonstrate up to 100 Gbaud OOK and PAM4 transmission over a 400 m standard single-mode fiber with a monolithically integrated externally modulated laser (EML) having 100 GHz 3 dB bandwidth with 2 dB ripple. We evaluate its capabilities to enable 800 GbE client-side links based on eight, and even four, optical lanes for optical interconnect applications. We study the equalizer’s complexity when increasing the baud rate of PAM4 signals. Furthermore, we extend our work with numerical simulations showing the required received optical power (ROP) for a certain bit error rate (BER) for the different combinations of the effective number of bits (ENOB) and extinction ratio (ER) at the transmitter. We also show a possibility to achieve around 1 km dispersion uncompensated transmission with a simple decision feedback equalizer (DFE) for a 100 Gbaud OOK, PAM4, and eight-level PAM (PAM8) link having the received power penalty of around 1 dB. Full article
(This article belongs to the Special Issue Advances in Optical Fiber Communications)
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