Wireless optical energy transmission using optical beamforming

Kim, Sung-Man; Kim, Seong–Min

doi:10.1117/1.oe.52.4.043205

Cited by 21 publications

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“…The LD used in the previous work was a 3 mW LD, and the LD used in the current work is a 100 mW LD. This is why the E/O conversion efficiency of the LD in this work is better than in our previous work [8] . In addition, as we mentioned, the O/E conversion efficiency of the solar cell increases with the input optical power up to a certain level.…”

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confidence: 48%

“…Although the transfer efficiency of the OWPT is lower than other technologies in the short distance, it is expected to be higher than other technologies in the long distance. Until now, there have been several researches on OWPT [8][9][10][11][12][13] . Most of them are based on a laser transmitter and a solar cell receiver, whereas a couple of OWPT works using a light-emitting diode (LED) transmitter have been demonstrated [8,9] .…”

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confidence: 99%

“…Until now, there have been several researches on OWPT [8][9][10][11][12][13] . Most of them are based on a laser transmitter and a solar cell receiver, whereas a couple of OWPT works using a light-emitting diode (LED) transmitter have been demonstrated [8,9] . Although OWPT could be a suitable solution for long-distance wireless power transfer, there is only a limited amount of research toward this.…”

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confidence: 99%

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Experimental demonstration of underwater optical wireless power transfer using a laser diode

Kim¹,

Choi²,

Jung³

2018

Chin. Opt. Lett.

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We experimentally demonstrate an underwater optical wireless power transfer (OWPT) using a laser diode (LD) as a power transmitter. We investigate the characteristics of a solar cell and a photodiode (PD) as a power receiver. We optimize the LD, the PD, and the solar cell to achieve the maximum transfer efficiency. The maximum transfer efficiency of the back-to-back OWPT is measured as 4.3% with the PD receiver. Subsequently, we demonstrate the OWPT in tap and sea water. Our result shows an attenuation of 3 dB/m in sea water. OCIS codes: 010.3310, 010.

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confidence: 48%

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confidence: 99%

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confidence: 99%

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Experimental demonstration of underwater optical wireless power transfer using a laser diode

Kim¹,

Choi²,

Jung³

2018

Chin. Opt. Lett.

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“…Furthermore, demonstration of IR-linked energy transmission using beam forming along with a spatial light modulator (SLM) is shown in Ref. [7]. An efficient power and angle adaptation technique is proposed in Refs.…”

Section: Introductionmentioning

confidence: 99%

Holograms in Optical Wireless Communications

Alresheedi¹,

Hussein²,

Elmirghani³

2017

Optical Fiber and Wireless Communications

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Adaptive beam steering in optical wireless communication (OWC) system has been shown to offer performance enhancements over traditional OWC systems. However, an increase in the computational cost is incurred. In this chapter, we introduce a fast hologram selection technique to speed up the adaptation process. We propose a fast delay, angle and power adaptive holograms (FDAPA-Holograms) approach based on a divide and conquer methodology and evaluate it with angle diversity receivers in a mobile optical wireless (OW) system. The fast and efficient fully adaptive FDAPA-Holograms system can improve the receiver signal to noise ratio (SNR) and reduce the required time to estimate the position of the receiver. The adaptation techniques (angle, power and delay) offer a degree of freedom in the system design. The proposed system FDAPA-Holograms is able to achieve high data rate of 5 Gb/s with full mobility. Simulation results show that the proposed 5 Gb/s FDAPA-Holograms achieves around 13 dB SNR under mobility and under eye safety regulations. Furthermore, a fast divide and conquer search algorithm is introduced to find the optimum hologram as well as to reduce the computation time. The proposed system (FDAPA-Holograms) reduces the computation time required to find the best hologram location from 64 ms using conventional adaptive system to around 14 ms.

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“…Compared with techniques based on induc-tive coupling [4], microwave power transmission has the potential to reach longer distances (on the order of meters or even kilometers). Meanwhile, microwave power transmission enjoys several advantages relative to optical power transmission [5]. First, microwave has better penetration compatibility than optical waves.…”

Section: Introductionmentioning

confidence: 99%

Microwave Power Transmission Based on Retro-reflective Beamforming

Wang¹,

Lu²

2016

Wireless Power Transfer - Fundamentals and Technologies

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Microwave power transmission has the potential to supply wireless power to portable/ mobile electronic devices over long distances (on the order of meters or even kilometers) efficiently. Nevertheless, several technical challenges remain to be resolved in order to accomplish practical microwave power transmission systems, including (i) minimizing power loss due to microwave propagation, (ii) preventing humans and other electrical systems from exposure to excessive microwave radiation, and (iii) reconfiguring wireless power transmission in reaction to environmental changes (such as physical movements of portable devices) in real time. In this chapter, a microwave power transmission scheme based on retro-reflective beamforming is proposed to address the above challenges. In the retro-reflective beamforming, wireless power transmission is guided by pilot signals. To be specific, one or more than one mobile device(s) broadcast pilot signals to their surroundings, and based on analyzing the pilot signals, a wireless power transmitter delivers focused power beam(s) onto the mobile device(s). Preliminary numerical and experimental results are presented to demonstrate the feasibility of the proposed retroreflective beamforming scheme.

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Wireless optical energy transmission using optical beamforming

Cited by 21 publications

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Experimental demonstration of underwater optical wireless power transfer using a laser diode

Experimental demonstration of underwater optical wireless power transfer using a laser diode

Holograms in Optical Wireless Communications

Microwave Power Transmission Based on Retro-reflective Beamforming

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