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Optics
Special Issues
Recent Developments in Optical Communications
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Recent Developments in Optical Communications

A special issue of Optics (ISSN 2673-3269). This special issue belongs to the section "Photonics and Optical Communications".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 8586

Special Issue Editor

Prof. Dr. Paulo Monteiro

E-Mail Website
Honorary Guest Editor
Instituto de Telecomunicações, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal
Interests: optical communications; communication networks
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Optical communication performed an important role in the communication methods during several millennia. The optical communication systems had been the hot research point for a long time. To give a platform for the researchers in this area to publish their recent achievements, Optics Editorial Office decided to organize this special issue with our editorial board members. We hope to attract scientists to contribute in dealing with component/system development, signal processing and communication algorithms.

The aim of this Special Issue is covering, but not limited to, the following topics:

  • Coherent optical communication;
  • Free space communication;
  • Modulation formats for short/medium reach applications;
  • Flexible/agile optical networks;
  • Digital signal processing;
  • Spatial division multiplexing systems (few-mode fibers, multicore fibers);
  • Optical transmitters/ receivers/ amplifiers

Prof. Dr. Paulo Monteiro
Honorary 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. Optics is an international peer-reviewed open access quarterly 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 1200 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 communication systems
  • optical signal processing
  • optical fibers
  • Integrated photonics
  • Microwave photonics

Published Papers (2 papers)

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Research

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9 pages, 3307 KiB  
Article
Dual-Output Mode Analysis of Multimode Laguerre-Gaussian Beams via Deep Learning
by Xudong Yuan, Yaguang Xu, Ruizhi Zhao, Xuhao Hong, Ronger Lu, Xia Feng, Yongchuang Chen, Jincheng Zou, Chao Zhang, Yiqiang Qin and Yongyuan Zhu
Optics 2021, 2(2), 87-95; https://doi.org/10.3390/opt2020009 - 24 May 2021
Cited by 5 | Viewed by 2888
Abstract
The Laguerre-Gaussian (LG) beam demonstrates great potential for optical communication due to its orthogonality between different eigenstates, and has gained increased research interest in recent years. Here, we propose a dual-output mode analysis method based on deep learning that can accurately obtain both [...] Read more.
The Laguerre-Gaussian (LG) beam demonstrates great potential for optical communication due to its orthogonality between different eigenstates, and has gained increased research interest in recent years. Here, we propose a dual-output mode analysis method based on deep learning that can accurately obtain both the mode weight and phase information of multimode LG beams. We reconstruct the LG beams based on the result predicted by the convolutional neural network. It shows that the correlation coefficient values after reconstruction are above 0.9999, and the mean absolute error (MAE) of the mode weights and phases are about 1.4 × 10−3 and 2.9 × 10−3, respectively. The model still maintains relatively accurate prediction for the associated unknown data set and the noise-disturbed samples. In addition, the computation time of the model for a single test sample takes only 0.975 ms on average. These results show that our method has good abilities of generalization and robustness and allows for nearly real-time modal analysis. Full article
(This article belongs to the Special Issue Recent Developments in Optical Communications)
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Review

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17 pages, 5375 KiB  
Review
A 100 Gbps OFDM-Based 28 GHz Millimeter-Wave Radio over Fiber Fronthaul System for 5G
by James Dzisi Gadze, Reynah Akwafo, Kwame Agyeman-Prempeh Agyekum and Kwasi Adu-Boahen Opare
Optics 2021, 2(2), 70-86; https://doi.org/10.3390/opt2020008 - 30 Apr 2021
Cited by 5 | Viewed by 4725
Abstract
Due to the unprecedented growth in mobile data traffic, emerging mobile access networks such as fifth-generation (5G) would require huge bandwidth and a mobile fronthaul architecture as an essential solution in providing a high capacity for support in the future. To increase capacity, [...] Read more.
Due to the unprecedented growth in mobile data traffic, emerging mobile access networks such as fifth-generation (5G) would require huge bandwidth and a mobile fronthaul architecture as an essential solution in providing a high capacity for support in the future. To increase capacity, utilizing millimeter waves (mm-waves) in an analog radio over fiber (RoF) fronthaul link is the major advancement and solution in achieving higher bandwidth and high data rate to cater for 5G mobile communication. In this paper, we demonstrate the feasibility of transmission and reception of a 100 Gbits/s data rate link at 28 GHz. The performance of three modulation formats (16-PSK, 16-QAM and 64-QAM) have been compared for an optical fiber length from 5 km up to 35 km for two detection systems; coherent and direct detection. Also, in this paper, the transmission impairments inherent to transmission systems are realized through the implementation of a digital signal processing (DSP) compensation scheme in the receiver system to enhance system performance. Quality factor (QF) and bit error rate (BER) are used as metrics to evaluate the system performance. The proposed system model is designed and simulated using Optisystem 16. Full article
(This article belongs to the Special Issue Recent Developments in Optical Communications)
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