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Photonics
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Editorial Board Members’ Collection Series: Optical Wireless Communication
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Editorial Board Members’ Collection Series: Optical Wireless Communication

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Communication and Network".

Deadline for manuscript submissions: 30 October 2025 | Viewed by 1642

Special Issue Editors

Dr. Jianyang Shi

E-Mail Website
Guest Editor
Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, Shanghai 200433, China
Interests: visible light communication; modulation formats; optical communication; fiber transmission; machine learning
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Junwen Zhang

E-Mail Website
Guest Editor
Key Laboratory for Information Science of Electromagnetic Waves (MoE), School of Information Science and Technology, Fudan University, Shanghai 200433, China
Interests: fiber transmission; millimeter wave communication; terahertz communication; neural network; optical transmission system
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Optical Wireless Communication (OWC) is a rapidly evolving field that holds the potential to transform data transmission through the utilization of light waves in free space. OWC offers several advantages, such as high data rates, secure communication, low interference, and efficient spectrum usage. These benefits make it an attractive solution for various applications, including indoor and outdoor wireless networks, vehicular communication systems, underwater communication, and space communication.

This Special Issue aims to present the latest advancements and trends in OWC, encompassing theoretical developments, innovative design approaches, advanced digital signal processing techniques, and practical applications. We welcome contributions that provide new insights into OWC systems, including Visible Light Communication (VLC), Infrared Communication, Ultraviolet Communication, and Free Space Optical Communication (FSO). The goal is to highlight cutting-edge research that addresses the current challenges and paves the way for future innovations in OWC.

We invite you to submit original research articles, review papers, and communications to share your recent findings and perspectives in this dynamic field. We look forward to your valuable contributions to this Special Issue, which will serve as a significant resource for researchers, engineers, and practitioners.

Dr. Jianyang Shi
Prof. Dr. Junwen Zhang
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. Photonics 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 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

  • visible light communication (VLC)
  • infrared communication
  • ultraviolet communication
  • free space optical communication (FSO)
  • modulation techniques
  • channel modeling
  • system design
  • photodetectors
  • optical receivers
  • signal processing
  • vehicular communication
  • underwater optical wireless communication
  • space optical communication
  • inter-satellite communication
  • satellite ground communication

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Published Papers (3 papers)

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Research

25 pages, 3310 KiB  
Article
Real-Time Signal Quality Assessment and Power Adaptation of FSO Links Operating Under All-Weather Conditions Using Deep Learning Exploiting Eye Diagrams
by Somia A. Abd El-Mottaleb and Ahmad Atieh
Photonics 2025, 12(8), 789; https://doi.org/10.3390/photonics12080789 - 4 Aug 2025
Viewed by 256
Abstract
This paper proposes an intelligent power adaptation framework for Free-Space Optics (FSO) communication systems operating under different weather conditions exploiting a deep learning (DL) analysis of received eye diagram images. The system incorporates two Convolutional Neural Network (CNN) architectures, LeNet and Wide Residual [...] Read more.
This paper proposes an intelligent power adaptation framework for Free-Space Optics (FSO) communication systems operating under different weather conditions exploiting a deep learning (DL) analysis of received eye diagram images. The system incorporates two Convolutional Neural Network (CNN) architectures, LeNet and Wide Residual Network (Wide ResNet) algorithms to perform regression tasks that predict received signal quality metrics such as the Quality Factor (Q-factor) and Bit Error Rate (BER) from the received eye diagram. These models are evaluated using Mean Squared Error (MSE) and the coefficient of determination (R2 score) to assess prediction accuracy. Additionally, a custom CNN-based classifier is trained to determine whether the BER reading from the eye diagram exceeds a critical threshold of 10−4; this classifier achieves an overall accuracy of 99%, correctly detecting 194/195 “acceptable” and 4/5 “unacceptable” instances. Based on the predicted signal quality, the framework activates a dual-amplifier configuration comprising a pre-channel amplifier with a maximum gain of 25 dB and a post-channel amplifier with a maximum gain of 10 dB. The total gain of the amplifiers is adjusted to support the operation of the FSO system under all-weather conditions. The FSO system uses a 15 dBm laser source at 1550 nm. The DL models are tested on both internal and external datasets to validate their generalization capability. The results show that the regression models achieve strong predictive performance, and the classifier reliably detects degraded signal conditions, enabling the real-time gain control of the amplifiers to achieve the quality of transmission. The proposed solution supports robust FSO communication under challenging atmospheric conditions including dry snow, making it suitable for deployment in regions like Northern Europe, Canada, and Northern Japan. Full article
(This article belongs to the Special Issue Editorial Board Members’ Collection Series: Optical Wireless Communication)
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22 pages, 1423 KiB  
Article
On the Performance of Non-Lambertian Relay-Assisted 6G Visible Light Communication Applications
by Jupeng Ding, Chih-Lin I, Jintao Wang and Hui Yang
Photonics 2025, 12(6), 541; https://doi.org/10.3390/photonics12060541 - 26 May 2025
Viewed by 334
Abstract
Visible light communication (VLC) has become one important candidate technology for beyond 5G and even 6G wireless networks, mainly thanks to its abundant unregulated light spectrum resource and the ubiquitous deployment of light-emitting diodes (LED)-based illumination infrastructures. Due to the high directivity of [...] Read more.
Visible light communication (VLC) has become one important candidate technology for beyond 5G and even 6G wireless networks, mainly thanks to its abundant unregulated light spectrum resource and the ubiquitous deployment of light-emitting diodes (LED)-based illumination infrastructures. Due to the high directivity of VLC channel propagation, relay-based cooperative techniques have been introduced and explored to enhance the transmission performance of VLC links. Nevertheless, almost all current works are limited to scenarios adopting well-known Lambertian transmitter and relay, which fail to characterize the scenarios with distinctive non-Lambertian transmitter or relay. For filling this gap, in this article, relay-assisted VLC employing diverse non-Lambertian optical beam configurations is proposed. Unlike the conventional Lambertian transmitter and relay-based research paradigm, the presented scheme employs the commercially available non-Lambertian transmitter and relay to configure the cooperative VLC links. Numerical results illustrate that up to 40.63 dB SNR could be provided by the proposed non-Lambertian relay-assisted VLC scheme, compared with about a 34.22 dB signal-to-noise ratio (SNR) of the benchmark Lambertian configuration. Full article
(This article belongs to the Special Issue Editorial Board Members’ Collection Series: Optical Wireless Communication)
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19 pages, 8765 KiB  
Article
Spatial Multiplexing Holography for Multi-User Visible Light Communication
by Chaoxu Chen, Yuan Wei, Haoyu Zhang, Ziyi Zhuang, Ziwei Li, Chao Shen, Junwen Zhang, Haiwen Cai, Nan Chi and Jianyang Shi
Photonics 2025, 12(2), 160; https://doi.org/10.3390/photonics12020160 - 17 Feb 2025
Viewed by 672
Abstract
Given the burgeoning necessity for high-speed, efficient, and secure wireless communication in 6G, visible light communication (VLC) has emerged as a fervent subject of discourse within academic and industrial circles alike. Among these considerations, it is imperative to construct scalable multi-user VLC systems, [...] Read more.
Given the burgeoning necessity for high-speed, efficient, and secure wireless communication in 6G, visible light communication (VLC) has emerged as a fervent subject of discourse within academic and industrial circles alike. Among these considerations, it is imperative to construct scalable multi-user VLC systems, meticulously addressing pivotal issues such as power dissipation, alignment errors, and the safeguarding of user privacy. However, traditional methods like multiplexing holography (MPH) and multiple focal (MF) phase plates have shown limitations in meeting these diverse requirements. Here, we propose a novel spatial multiplexing holography (SMH) theory, a comprehensive solution that overcomes existing hurdles by enabling precise power allocation, self-designed power coverage, and secure communication through orbital angular momentum (OAM). The transformative potential of SMH is demonstrated through simulations and experimental studies, showcasing its effectiveness in power distribution within systems of VR glasses users, computer users, and smartphone users; enhancing power coverage with an 11.6 dB improvement at coverage edges; and securing data transmission, evidenced by error-free 1080P video playback under correct OAM keys. Our findings illustrate the superior performance of SMH in facilitating seamless multi-user communication, thereby establishing a new benchmark for future VLC systems in the 6G landscape. Full article
(This article belongs to the Special Issue Editorial Board Members’ Collection Series: Optical Wireless Communication)
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