Optical Wireless Power Transmission Using Si Photovoltaic Through Air, Water, and Skin

Putra, Alexander William Setiawan; Tanizawa, Motoharu; Minamikawa, Takeo

doi:10.1109/lpt.2018.2887081

Cited by 41 publications

(24 citation statements)

References 18 publications

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“…As a result, if the beam shape remains unaltered, the magnitude of the photocurrent diminishes following the trajectory of the cosine function curve. The outcomes of the experiment are presented in Figure (6). The imaging area of the solar cell decreases with increasing angle following a cosine function (dashed line in the figure).…”

Section: Measurement Angle Dependency Of Photocurrentmentioning

confidence: 97%

“…Induction coupling WPT *khinmyothu@stu.kanazawa-u.ac.jp; +81-76-234-4886 operates in the low-frequency range, microwave WPT uses gigahertz frequencies, and OWPT employs higher light frequencies. Microwave and optical WPT offer advantages like beam steering and target mobility for long operational distances, without generating radio frequency interference [6].…”

Section: Introductionmentioning

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: Measurement Angle Dependency Of Photocurrentmentioning

confidence: 97%

Section: Introductionmentioning

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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“…134 Alternatively, silicon PV, which has the advantage of miniaturizing to a sub-mm size, is utilized as an optical power receiver at NIR in conjunction with a m-ILED. 135,136 The NIR-induced wireless optogenetic system can stimulate the central nervous system (Fig. 7b).…”

Section: Light-powered Integrated Systems For Optical Neuromodulationmentioning

confidence: 99%

“…157 According to the wireless optical neuromodulation system including silicon PV, an efficiency of 22.1% (940 nm) was observed up to 1 km distance through the air, an efficiency of 5.5% (400 nm) was observed up to 100 m depth through water, and an efficiency of 2.2% (910 nm) was shown up to only 10 mm thickness in human skin. 135 For the near field, the magnetic resonant coupling has the particular advantage of having a low SAR, which is induced by lowfrequency operation from hundreds of kHz to tens of MHz. 34,144 In practical terms, near-field communication with 13.56 MHz frequency enables a variety of applications, such as wearable electronics, optogenetic stimulation, and pharmacological neuromodulation for the long term, without safety issues.…”

Section: Comparison Of Various Wpts For Optical Neuromodulationmentioning

confidence: 99%

Optical neuromodulation at all scales: from nanomaterials to wireless optoelectronics and integrated systems

et al. 2023

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“…High-efficiency PPC's enable wireless power transmission isolated from electromagnetic disturbance, with applications in electric vehicles, biomedical implants, telecommunications, drones, and satellites [7][8][9][10] . The record-efficiency PPC is a vertical multijunction structure with 5 GaAs pn junctions coupled with tunnel diodes; it obtained an efficiency of 70% and operating voltage of greater than 5 V at an input power density of 8 W/cm 211 .…”

Section: Introductionmentioning

confidence: 99%

Efficiency Increase in Multijunction Monochromatic Photovoltaic Devices Due to Luminescent Coupling

Xia,

Krich

2020

Preprint

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We present a multijunction detailed balance model that includes the effects of luminescent coupling, light trapping and nonradiative recombination, suitable for treatment of multijunction solar cells and photonic power converters -photovoltaic devices designed to convert narrow-band light. The model includes both specular and Lambertian reflections using a ray-optic formalism and treats nonradiative processes using an internal radiative efficiency. Using this model, we calculate and optimize the efficiency of multijunction photonic power converters for a range of material qualities and light-trapping schemes. Multijunction devices allow increased voltage with lower current, decreasing series resistance losses. We show that efficiency increases significantly with increased number of junctions, even without series resistance, when the device has an absorbing substrate. Such an increase does not occur when the device has a back reflector. We explain this effect using a simplified model, which illustrates the origin of the decreased radiative losses in multijunction devices on substrates.

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Optical Wireless Power Transmission Using Si Photovoltaic Through Air, Water, and Skin

Cited by 41 publications

References 18 publications

Stabilization of optical wireless power transmission system using spatial light modulator

Stabilization of optical wireless power transmission system using spatial light modulator

Optical neuromodulation at all scales: from nanomaterials to wireless optoelectronics and integrated systems

Efficiency Increase in Multijunction Monochromatic Photovoltaic Devices Due to Luminescent Coupling

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