Light Field Optimization for Optical Wireless Power Transfer

Pan, Xu; Zhang, Wenjia; He, Zuyuan

doi:10.1109/jphot.2020.3044948

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…Understanding the interaction between light and PV cells is crucial for maximizing photoelectric efficiency [10]. The hot spot effect, caused by uneven energy distribution, can reduce PV cell efficiency.…”

Section: Importance Of Enhancing Efficiency and Real-time Beam Shape ...mentioning

confidence: 99%

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Stabilization of optical wireless power transmission system using spatial light modulator

Myo Thu,

Maruyama

2023

Laser Beam Shaping XXIII

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Optical Wireless Power Transmission (OWPT) system, using beam shaping, is a promising technology that involves a transmitter side using a laser and a receiver side using solar cells to transfer power wirelessly over long distances. The system faces a challenge of potential mismatch between both sides, which can lead to low efficiency of power transfer. The objective of this research is to improve the mismatch between the beam shape of a semiconductor laser light source and the shape of a photodetector solar cell. The shape of a typical solar cell is rectangular, which does not match the circular beam shape of the light source, resulting in lower power conversion efficiency. To address this, methods have been proposed to beam shape into a rectangle using Fresnel lenses or rectangular core optical fibers. However, the distance from the solar cell and the rotation of the solar cell itself change the size of the beam, resulting in a trapezoidal image as seen from the light source. In this study, we report the results of an evaluation of the change in efficiency with respect to changes in the object, using a spatial light modulator (SLM) that can arbitrarily shape the light beam. Specifically, we evaluate how adjusting the shape of a circular beam onto a solar cell target using the SLM leads to a decrease in photocurrent, and how recognizing an object's beam shape in real-time to control a camera using machine learning can predict object shape for error suppression compared to linear prediction.

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Section: Importance Of Enhancing Efficiency and Real-time Beam Shape ...mentioning

confidence: 99%

“…To address this issue, we have taken a proactive approach by creating a test video within the computer system as shown in Figure (9) and Figure (10). This serves the purpose of showcasing the movement of four markers, which simulate the motion of the target object.…”

Section: Solutions For Reducing Phase Pattern Generation Timementioning

confidence: 99%

Stabilization of optical wireless power transmission system using spatial light modulator

Myo Thu,

Maruyama

2023

Laser Beam Shaping XXIII

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“…Comparing Equation (14) with Equation ( 15), as the incident angle increases and the light beam enters the adjacent elemental lens of the second fly-eye lens, the size of the irradiated surface remains the same and the area adjacent to the irradiated surface for the allowable incident angle is irradiated.…”

Section: Principle Of Angle Dependence In Fly-eye Lens Systemmentioning

confidence: 99%

“…Among these, efficient operation of the solar cell, which is the light-receiving device, is an important part of the OWPT. Thus, verification of the operation characteristics and development of improved devices on the light-receiving side has been investigated [13][14][15]. While improving the photoelectric conversion efficiency of solar cells is important, uniform light irradiation to the solar cell module without light leakage from the solar cell is an important issue, especially for OWPT that irradiates with "light beams".…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of High Tolerance to Beam Irradiation Conditions of Light Beam Power Receiving Module for Optical Wireless Power Transmission Equipped with a Fly-Eye Lens System

Tai

Miyamoto

2022

Energies

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This paper is an experimental characterization of a light-receiving module containing a fly-eye lens system with high tolerance to beam irradiation conditions. The fly-eye lens system, which is tolerant to fluctuations in beam shape, beam size, number of beams, beam incident position, and beam incident direction, was proposed, a light receiver module with a fly-eye lens system was constructed, and its characteristics were evaluated. The effect of the beam size on the fly-eye lens system was evaluated and the tolerance to misalignment of beam incident position was measured. When a GaAs solar cell was irradiated with a laser beam of 450 nm wavelength and 6 W light output through a 90 cm long water tank with tap water, a maximum output of 0.755 W was obtained as underwater OWPT. In addition, a fly-eye lens system with mirrors applied to four surfaces was proposed and fabricated as a light-receiving side module that can receive high incident angles from any direction of up, down, left, and right and its effectiveness was clarified through experiments.

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Computational Intelligence for Modeling and Optimization of RFEH and WPT Systems: A Comprehensive Survey

et al. 2023

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Light Field Optimization for Optical Wireless Power Transfer

Cited by 8 publications

References 20 publications

Stabilization of optical wireless power transmission system using spatial light modulator

Stabilization of optical wireless power transmission system using spatial light modulator

Experimental Characterization of High Tolerance to Beam Irradiation Conditions of Light Beam Power Receiving Module for Optical Wireless Power Transmission Equipped with a Fly-Eye Lens System

Computational Intelligence for Modeling and Optimization of RFEH and WPT Systems: A Comprehensive Survey

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