Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.8
3.9
Journals
Sensors
Special Issues
Novel Technology in Optical Communications
sensors-logo
Submit to Special Issue Submit Abstract to Special Issue Review for Sensors Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Novel Technology in Optical Communications

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

Deadline for manuscript submissions: 20 September 2024 | Viewed by 2843

Special Issue Editor

Prof. Dr. Zhongyi Guo

E-Mail Website
Guest Editor
School of Computer and Information, Hefei University of Technology, Hefei 230009, China
Interests: advanced optical communications; communication devices and systems; intelligent information processing

Special Issue Information

Dear Colleagues,

Interest in optical communications has increased due to their higher capacity and improved security compared to those of conventional radiofrequency (RF) techniques. However, the optical communication system is prone to multiple path effects and external factors, resulting in error codes in propagations, which can be solved by channel equalization and coding technology. At present, dimensional resources in the light wave space domain provide new opportunities for the sustainable expansion of optical communications. For example, multi-core optical fibers based on spatial arrangement have been widely used in optical communications. In addition, structured light fields with different spatial structural characteristics can also be used to improve the communication capacity in FSO (Free-Space Optical) communication systems. Typical structured light fields include orbital angular momentum (OAM) light fields, vector light fields, and Hermite Gaussian light fields. However, one of the challenges of OAM-based communications is the perturbations from an inhomogeneous medium, such as atmospheric turbulence in free space and the nonuniform transverse refractive indices in fibers. Here, we are pleased to invite global researchers to present novel solutions to the problems in current optical communications.

This Special Issue aims to collect review articles and original research papers in the field of “Novel Technology in Optical Communications”. Potential topics include, but are not limited to, the following:

  • Fiber-optic communication;
  • OAM-based optical communications;
  • Ultraviolet communication;
  • Communication devices and systems;
  • Physical layer security;
  • Channel equalization;
  • Channel coding;
  • Multiple-input multiple-output

Prof. Dr. Zhongyi Guo
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. 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.

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

11 pages, 3743 KiB  
Article
Minimalist Deployment of Neural Network Equalizers in a Bandwidth-Limited Optical Wireless Communication System with Knowledge Distillation
by Yiming Zhu, Yuan Wei, Chaoxu Chen, Nan Chi and Jianyang Shi
Sensors 2024, 24(5), 1612; https://doi.org/10.3390/s24051612 - 01 Mar 2024
Viewed by 813
Abstract
An equalizer based on a recurrent neural network (RNN), especially with a bidirectional gated recurrent unit (biGRU) structure, is a good choice to deal with nonlinear damage and inter-symbol interference (ISI) in optical communication systems because of its excellent performance in processing time [...] Read more.
An equalizer based on a recurrent neural network (RNN), especially with a bidirectional gated recurrent unit (biGRU) structure, is a good choice to deal with nonlinear damage and inter-symbol interference (ISI) in optical communication systems because of its excellent performance in processing time series information. However, its recursive structure prevents the parallelization of the computation, resulting in a low equalization rate. In order to improve the speed without compromising the equalization performance, we propose a minimalist 1D convolutional neural network (CNN) equalizer, which is reconverted from a biGRU with knowledge distillation (KD). In this work, we applied KD to regression problems and explain how KD helps students learn from teachers in solving regression problems. In addition, we compared the biGRU, 1D-CNN after KD and 1D-CNN without KD in terms of Q-factor and equalization velocity. The experimental data showed that the Q-factor of the 1D-CNN increased by 1 dB after KD learning from the biGRU, and KD increased the RoP sensitivity of the 1D-CNN by 0.89 dB with the HD-FEC threshold of 1 × 10−3. At the same time, compared with the biGRU, the proposed 1D-CNN equalizer reduced the computational time consumption by 97% and the number of trainable parameters by 99.3%, with only a 0.5 dB Q-factor penalty. The results demonstrate that the proposed minimalist 1D-CNN equalizer holds significant promise for future practical deployments in optical wireless communication systems. Full article
(This article belongs to the Special Issue Novel Technology in Optical Communications)
►▼ Show Figures

Figure 1

10 pages, 1824 KiB  
Article
Dense Space-Division Multiplexing Exploiting Multi-Ring Perfect Vortex
by Xing Liu, Duo Deng, Zhenjun Yang and Yan Li
Sensors 2023, 23(23), 9533; https://doi.org/10.3390/s23239533 - 30 Nov 2023
Viewed by 543
Abstract
Vortex beams carrying orbital angular momentum (OAM) have gained much interest in optical communications because they can be used to expand the number of multiplexing channels and greatly improve the transmission capacity. However, the number of states used for OAM-based communication is generally [...] Read more.
Vortex beams carrying orbital angular momentum (OAM) have gained much interest in optical communications because they can be used to expand the number of multiplexing channels and greatly improve the transmission capacity. However, the number of states used for OAM-based communication is generally limited by the imperfect OAM generation, transmission, and demultiplexing methods. In this work, we proposed a dense space-division multiplexing (DSDM) scheme to further increase the transmission capacity and transmission capacity density of free space optical communications with a small range of OAM modes exploiting a multi-ring perfect vortex (MRPV). The proposed MRPV is generated using a pixel checkerboard complex amplitude modulation method that simultaneously encodes amplitude and phase information in a phase-only hologram. The four rings of the MRPV are mutually independent channels that transmit OAM beams under the condition of occupying only one spatial position, and the OAM mode transmitted in these spatial channels can be efficiently demodulated using a multilayer annular aperture. The effect of atmospheric turbulence on the MRPV was also analyzed, and the results showed that the four channels of the MRPV can be effectively separated under weak turbulence conditions. Under the condition of limited available space and OAM states, the proposed DSDM strategy exploiting MRPV might inspire wide optical communication applications exploiting the space dimension of light beams. Full article
(This article belongs to the Special Issue Novel Technology in Optical Communications)
►▼ Show Figures

Figure 1

Review

Jump to: Research

24 pages, 4888 KiB  
Review
Research Progress on Router Devices for the OAM Optical Communication
by Binbin Wang, Xizheng Zhang, Jinlong Tian, Badreddine Merabet, Zhixiang Li, Syed Afaq Ali Shah, Yi Lei, Bingyi Liu, Kai Guo and Zhongyi Guo
Sensors 2024, 24(3), 944; https://doi.org/10.3390/s24030944 - 01 Feb 2024
Viewed by 848
Abstract
Vortex beams carrying orbital angular momentum (OAM) provide a new degree of freedom for light waves in addition to the traditional degrees of freedom, such as intensity, phase, frequency, time, and polarization. Due to the theoretically unlimited orthogonal states, the physical dimension of [...] Read more.
Vortex beams carrying orbital angular momentum (OAM) provide a new degree of freedom for light waves in addition to the traditional degrees of freedom, such as intensity, phase, frequency, time, and polarization. Due to the theoretically unlimited orthogonal states, the physical dimension of OAM is capable of addressing the problem of low information capacity. With the advancement of the OAM optical communication technology, OAM router devices (OAM-RDs) have played a key role in significantly improving the flexibility and practicability of communication systems. In this review, major breakthroughs in the OAM-RDs are summarized, and the latest technological standing is examined. Additionally, a detailed account of the recent works published on techniques related to the OAM-RDs has been categorized into five areas: channel multicasting, channel switching, channel filtering, channel hopping, and channel adding/extracting. Meanwhile, the principles, research methods, advantages, and disadvantages are discussed and summarized in depth while analyzing the future development trends and prospects of the OAM-RDs. Full article
(This article belongs to the Special Issue Novel Technology in Optical Communications)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop