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Advances in Optical Communications and Networks
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Advances in Optical Communications and Networks

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Communications".

Deadline for manuscript submissions: closed (11 May 2023) | Viewed by 7451

Special Issue Editors

Dr. Paweł Rosa

E-Mail Website
Guest Editor
National Institute of Telecommunications, Szachowa 1, 04-894 Warsaw, Poland
Interests: photonics; optics and photonics; nonlinear optics; optical fibers; applied optics; fiber optic technology; fiber optic communication
Special Issues, Collections and Topics in MDPI journals
Dr. Mingming Tan

E-Mail Website
Guest Editor
Aston Institute of Photonic Technologies, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK
Interests: optical communications; Raman amplification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The nonlinear Shannon limit and the maximum launch power that standard single mode fibre (SMF) can handle puts the physical restrain on the maximum capacity of conventional optical communication links. As the demand for the bandwidth in optical networks continues to grow exponentially, triggered by high-definition media streaming, cloud computing and social media, to name few, it is of great interest to study alternative solutions.  

This Special Issue aims to deliver new methods and ideas to overcome the capacity crunch in telecommunication links that seems to be inevitable in the near future.

Dr. Paweł Rosa
Dr. Mingming Tan
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. Sensors 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 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 communication
  • optical amplifiers
  • Raman amplification
  • nonlinear compensation
  • optical phase conjugation
  • multimode fibres

Published Papers (4 papers)

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Research

13 pages, 3265 KiB  
Article
Asymmetry Optimization for 10 THz OPC Transmission over the C + L Bands Using Distributed Raman Amplification
by Paweł Rosa, Giuseppe Rizzelli Martella, Juan Diego Ania Castañón and Mingming Tan
Sensors 2023, 23(6), 2906; https://0-doi-org.brum.beds.ac.uk/10.3390/s23062906 - 7 Mar 2023
Cited by 1 | Viewed by 1472
Abstract
An optimized design for a broadband Raman optical amplifier in standard single-mode fiber covering the C and L bands is presented, to be used in combination with wideband optical phase conjugation (OPC) nonlinearity compensation. The use of two Raman pumps and fiber Bragg [...] Read more.
An optimized design for a broadband Raman optical amplifier in standard single-mode fiber covering the C and L bands is presented, to be used in combination with wideband optical phase conjugation (OPC) nonlinearity compensation. The use of two Raman pumps and fiber Bragg grating reflectors at different wavelengths for the transmitted (C band) and conjugated (L band) WDM channels is proposed to extend bandwidth beyond the limits imposed by single-wavelength pumping, for a total 10 THz. Optimization of pump and reflector wavelength, as well as pump powers, allows us to achieve low asymmetry across the whole transmission band for optimal nonlinearity compensation. System performance is simulated to estimate OSNR, gain flatness and nonlinear Kerr distortion. Full article
(This article belongs to the Special Issue Advances in Optical Communications and Networks)
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10 pages, 491 KiB  
Article
Wideband Multichannel Nyquist-Spaced Long-Haul Optical Transmission Influenced by Enhanced Equalization Phase Noise
by Cenqin Jin, Nikita A. Shevchenko, Junqiu Wang, Yunfei Chen and Tianhua Xu
Sensors 2023, 23(3), 1493; https://0-doi-org.brum.beds.ac.uk/10.3390/s23031493 - 29 Jan 2023
Cited by 1 | Viewed by 1657
Abstract
Enhanced equalization phase noise (EEPN), generated from the uncompensated dispersion experienced by laser phase noises, can cause serious damage to the transmission quality of optical fiber systems. In this work, the performance of a wideband Nyquist-spaced long-haul nonlinear optical fiber communication systems suffering [...] Read more.
Enhanced equalization phase noise (EEPN), generated from the uncompensated dispersion experienced by laser phase noises, can cause serious damage to the transmission quality of optical fiber systems. In this work, the performance of a wideband Nyquist-spaced long-haul nonlinear optical fiber communication systems suffering from EEPN is investigated and discussed through split-step numerical simulations and analytical models based on the perturbation analysis, in the cases of digital nonlinearity compensation (NLC) and electronic dispersion compensation (EDC). The efficiency and the accuracy of the analytical models were validated via simulations, considering the different symbol rates and modulation formats. The performance of the C-band transmission was comprehensively studied based on the model. Our results reveal that the growth of symbol rates and transmission distances aggravates the distortions in the C-band system. Full article
(This article belongs to the Special Issue Advances in Optical Communications and Networks)
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13 pages, 718 KiB  
Article
A Bidirectional Wavelength Division Multiplexed (WDM) Free Space Optical Communication (FSO) System for Deployment in Data Center Networks (DCNs)
by Fady El-Nahal, Tianhua Xu, Dokhyl AlQahtani and Mark Leeson
Sensors 2022, 22(24), 9703; https://0-doi-org.brum.beds.ac.uk/10.3390/s22249703 - 11 Dec 2022
Cited by 15 | Viewed by 2359
Abstract
Data centers are crucial to the growth of cloud computing. Next-generation data center networks (DCNs) will rely heavily on optical technology. Here, we have investigated a bidirectional wavelength-division-multiplexed (WDM) free space optical communication (FSO) system for deployment in optical wireless DCNs. The system [...] Read more.
Data centers are crucial to the growth of cloud computing. Next-generation data center networks (DCNs) will rely heavily on optical technology. Here, we have investigated a bidirectional wavelength-division-multiplexed (WDM) free space optical communication (FSO) system for deployment in optical wireless DCNs. The system was evaluated for symmetric 10 Gbps 16—quadrature amplitude modulation (16-QAM) intensity-modulated orthogonal frequency-division multiplexing (OFDM) downstream signals and 10 Gbps on-off keying (OOK) upstream signals, respectively. The transmission of optical signals over an FSO link is demonstrated using a gamma–gamma channel model. According to the bit error rate (BER) results obtained for each WDM signal, the bidirectional WDM-FSO transmission could achieve 320 Gbps over 1000 m free space transmission length. The results show that the proposed FSO topology offers an excellent alternative to fiber-based optical interconnects in DCNs, allowing for high data rate bidirectional transmission. Full article
(This article belongs to the Special Issue Advances in Optical Communications and Networks)
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15 pages, 2197 KiB  
Article
Research on Performance of Cooperative FSO Communication System Based on Hierarchical Modulation and Physical Layer Network Code
by Huaijun Qin, Yang Cao, Xiaofeng Peng and Zupeng Zhang
Sensors 2022, 22(18), 6912; https://0-doi-org.brum.beds.ac.uk/10.3390/s22186912 - 13 Sep 2022
Cited by 1 | Viewed by 1296
Abstract
To solve the problem that the channel conditions in asymmetric cooperative FSO communication systems are not fully utilized, and the data reliability deteriorates due to high-order modulation, we proposed a layered modulation, joint physical-layer network coding scheme. In this scheme, we first designate [...] Read more.
To solve the problem that the channel conditions in asymmetric cooperative FSO communication systems are not fully utilized, and the data reliability deteriorates due to high-order modulation, we proposed a layered modulation, joint physical-layer network coding scheme. In this scheme, we first designate the data priority of the information to be transmitted at the source node. Then, the transmission power of different proportions is allocated to the data based on its priority. Then, the modulated data is sent to each node, and physical-layer network coding is performed on the received data at the relay node. Finally, the relay node sends the encoded information to the destination node, and the destination node recovers the original information using the physical-layer network coding scheme. The simulation results showed that when the average signal-to-noise ratio of the channel was 15 dB, the BER of the cooperative FSO communication system could be reduced to below 10−8. In the strong atmospheric turbulence channel, the cooperative FSO communication system can obtain a signal-to-noise ratio gain of about 1.5 dB. Under strong atmospheric turbulence, this scheme could also improve the average channel capacity performance of a cooperative FSO communication system. Full article
(This article belongs to the Special Issue Advances in Optical Communications and Networks)
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