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Photonics
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Latest Papers Related to OWPT 2024 on the Topics of...
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Latest Papers Related to OWPT 2024 on the Topics of Devices, Components and Systems

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "New Applications Enabled by Photonics Technologies and Systems".

Deadline for manuscript submissions: 31 January 2025 | Viewed by 3387

Special Issue Editors

Dr. Tomoyuki Miyamoto

E-Mail Website
Guest Editor
Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
Interests: optical wireless power transmission; light source; light receiver
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Motoharu Matsuura

E-Mail Website
Guest Editor
Photonics Research Laboratory, University of Electro-Communications, Tokyo 182-8585, Japan
Interests: power over fiber; optical communication
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electrical power transmission is an essential function of equipment. Although wiring, batteries, and energy harvesting have been used, these methods have various problems. Society can advance with new equipment and services by addressing the power transmission issue. Power transmission methods using light beams are attracting attention as promising technologies. The first method involves power transmission in wireless, which, similar to wireless communication, has greatly progressed society. Optical wireless power transmission (OWPT) is extremely promising because of its potential for long-distance power transmission, lack of electromagnetic interference, small size, and lightweight. The second method involves power transmission using an optical fiber. Power over fiber (PoF) has the potential to provide new value to infrastructure by being lightweight and taking advantage of features not provided in existing wiring, such as surge resistance and integration with extremely high-capacity communications.

These optical power transmission technologies will be applied in the near future to a wide variety of applications, from minute IoT terminals to home appliances, industrial equipment, mobilities such as electric vehicles, robots, and drones, and power transmission infrastructure in various environments where conventional methods are difficult to apply. On the other hand, although the basic technical functions of these optical power transmission technologies already exist, practical and commercial systems are still very limited, and thus, the activation of related research strongly demands the development of many applications. By clarifying the superiority of this optical power transmission, identifying the problems to be solved, and collecting the state-of-the-art features of this field, such as materials, devices, subsystems, systems, and applications, as well as safety and standardization, we can anticipate the creation of numerous societal benefits in the foreseeable future.

For this reason, we have decided to publish a Special Issue that contains the latest results. Although this field is related to energy and photonics technologies, it is configured by a wide range of technologies, such as materials, devices, systems, and applications, as described above. This Special Issue will target papers related to individual devices such as light sources and light-receiving devices, functional integration, systems, and applications of optical power transmission.

Dr. Tomoyuki Miyamoto
Prof. Dr. Motoharu Matsuura
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

  • optical wireless power transmission
  • laser power beaming
  • power over fiber
  • OWPT subsystem
  • OWPT system

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Related Special Issues

Published Papers (4 papers)

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19 pages, 11818 KiB  
Article
Enhancing Alignment Accuracy in Laser Wireless Power Transmission Systems Using Integrated Target Detection and Perturbation-Observation Method
by Jinsong Kang, Liangrong Sun, Yanping Zhou and Yunfeng Bai
Photonics 2024, 11(11), 1094; https://doi.org/10.3390/photonics11111094 - 20 Nov 2024
Viewed by 225
Abstract
This paper introduces a high-precision alignment method for laser wireless power transmission (LWPT) systems, integrating neural network-based target detection with a perturbation-observation technique. The objective is to enhance the alignment accuracy between the laser spot and the photovoltaic array, thereby improving energy transfer [...] Read more.
This paper introduces a high-precision alignment method for laser wireless power transmission (LWPT) systems, integrating neural network-based target detection with a perturbation-observation technique. The objective is to enhance the alignment accuracy between the laser spot and the photovoltaic array, thereby improving energy transfer efficiency. The method’s key feature is its ability to achieve these results without requiring additional optical components, simplifying system design. Continual assessment and adjustment based on real-time output power data ensure optimal alignment, maximizing the photovoltaic array power output. Experimental results demonstrated that the proposed method achieved an initial alignment precision with pixel errors below 3%, translating to a physical error of approximately 7 mm. Fine-tuning through the perturbation-observation method further optimized the alignment, resulting in a photovoltaic array power output of 98.70% of its maximum potential. This hybrid approach provides a reliable solution for boosting the performance of LWPT systems, offering significant potential for practical applications. Full article
(This article belongs to the Special Issue Latest Papers Related to OWPT 2024 on the Topics of Devices, Components and Systems)
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13 pages, 4254 KiB  
Article
Demonstration of an In-Flight Entertainment System Using Power-over-Fiber
by Joao B. Rosolem, Fabio R. Bassan, Marcelo P. de Oliveira, Alexandre B. dos Santos and Leonardo M. Wollinger
Photonics 2024, 11(7), 627; https://doi.org/10.3390/photonics11070627 - 1 Jul 2024
Viewed by 840
Abstract
The use of optical fibers is increasing in modern aircraft because this helps solve challenges of size, weight, communication, and reliability in new generation aircraft. This study describes a video and power transmission system using optical fibers (PoF) for in-flight entertainment (IFE) system [...] Read more.
The use of optical fibers is increasing in modern aircraft because this helps solve challenges of size, weight, communication, and reliability in new generation aircraft. This study describes a video and power transmission system using optical fibers (PoF) for in-flight entertainment (IFE) system application. We present the benefits and the limitations of this application, and we perform two practical experiments to demonstrate their performance. We used off-the-shelf devices in the experiments, such as one 15-Watt semiconductor laser operating at 808 nm, GaAs photovoltaic converters, optical transmitters and receivers, and video monitors. The power and video signals were transmitted using two 50-m length multimode fibers. In addition, we proposed and tested two types of energy transformation units (ETUs), which are responsible for supplying electrical energy to the IFE video monitor and the optical fiber receiver. Full article
(This article belongs to the Special Issue Latest Papers Related to OWPT 2024 on the Topics of Devices, Components and Systems)
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19 pages, 4162 KiB  
Article
Camera-Based Safety System for Optical Wireless Power Transmission Using Dynamic Safety-Distance
by Chen Zuo and Tomoyuki Miyamoto
Photonics 2024, 11(6), 500; https://doi.org/10.3390/photonics11060500 - 24 May 2024
Cited by 1 | Viewed by 899
Abstract
This paper introduces a new safety approach for Optical Wireless Power Transmission (OWPT), a technology that is integral to the new kinds of Wireless Power Transmission technology (WPT). It starts from the fundamental configuration of the current OWPT system, addressing the safety concerns [...] Read more.
This paper introduces a new safety approach for Optical Wireless Power Transmission (OWPT), a technology that is integral to the new kinds of Wireless Power Transmission technology (WPT). It starts from the fundamental configuration of the current OWPT system, addressing the safety concerns related to lasers by involving laser irradiation hazards, laser exposure regulation and guidelines, and a comparison with other safety methods. A camera-based OWPT safety system focused on the emission control of the light source is proposed, and it utilizes a depth camera and finely tuned computer vision-based control program. Through meticulous system design and experiments, the proposed system can detect moving objects in a limited indoor environment and control the laser/LED light transmission according to the object’s velocity dynamically. Various functions and exclusive improvements towards OWPT operation are mentioned, and Dynamic Safety-Distance is proposed as the core mechanism of the safety system. Through on-site experiments, indoor safety control and system operation’s evaluation are discussed, acknowledging both the advantages and limitations of the proposed safety system. This paper concludes with suggestions for further developments in camera-based OWPT safety incorporating the concept of Automatic Emission Control. Full article
(This article belongs to the Special Issue Latest Papers Related to OWPT 2024 on the Topics of Devices, Components and Systems)
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22 pages, 14274 KiB  
Article
Real-Time Tracking of Photovoltaics by Differential Absorption Imaging in Optical Wireless Power Transmission
by Kaoru Asaba and Tomoyuki Miyamoto
Photonics 2024, 11(6), 490; https://doi.org/10.3390/photonics11060490 - 22 May 2024
Cited by 1 | Viewed by 736
Abstract
In the future, wireless power transmission is expected to cover power levels ranging from milliwatts to megawatts and over distances of a few meters to kilometers for both stationary and moving photovoltaic (PV) targets. Optical wireless power transmission (OWPT) is a promising solution [...] Read more.
In the future, wireless power transmission is expected to cover power levels ranging from milliwatts to megawatts and over distances of a few meters to kilometers for both stationary and moving photovoltaic (PV) targets. Optical wireless power transmission (OWPT) is a promising solution for such multi-scale systems, which use the narrow beam divergence of light. To enhance the efficiency of power generation in PV targets, real-time detection of the target’s position and attitude is crucial for OWPT systems. The authors propose detecting the PV using differential absorption images as one such method. This paper investigates algorithms for tracking moving PV targets and evaluates their performance. The first algorithm combines thresholds with an autoregressive (AR) model, while the other two use estimation with Kalman filters. The comparison of tracking algorithms can be undertaken using a score function based on the position estimation error. The evaluation results indicate that the AR model combined with thresholds, on average, outperforms the other models. There was no significant difference between the approach involving use of a Kalman filter to estimate positions based on a uniform motion model and the approach involving use of a Kalman filter to estimate the AR model. The authors’ series of studies, from a former high-level requirement study to the current target tracking using differential absorption imaging, has verified a concept for one of the crucial processes in OWPT. These works form a step toward the practical implementation of OWPT systems. Full article
(This article belongs to the Special Issue Latest Papers Related to OWPT 2024 on the Topics of Devices, Components and Systems)
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