Author Affiliations
Abstract
Department of Electronic Engineering, Kyungsung University, Nam-Gu, Busan 48434, South Korea
We experimentally demonstrated optical wireless power transfer (OWPT) using a near-infrared laser diode (LD) as the optical power transmitter. We considered a photovoltaic (PV) cell and a photodiode (PD) as the optical power receivers. We investigated the characteristics of the LD, PD, and PV cell in order to determine the optimum operating condition from the viewpoint of transfer efficiency. We also experimentally demonstrated a whole system optimization process to maximize the DC-to-DC transfer efficiency of the OWPT. Our experimental results showed that the optimization process can improve the OWPT efficiency by up to 48%.
optical wireless power transfer optical wireless power transmission Chinese Optics Letters
2020, 18(4): 042603
Author Affiliations
Abstract
Department of Electronic Engineering, Kyungsung University, Nam-Gu, Busan 48434, Korea
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.
010.3310 Laser beam transmission Chinese Optics Letters
2018, 16(8): 080101
Author Affiliations
Abstract
Department of Electronic Engineering, Kyungsung University, Busan 608-736, South Korea
We propose and demonstrate a visible light communication (VLC) scheme based on space-division multiple access (SDMA) optical beamforming to accommodate multiple user devices in the VLC based on optical beamforming. SDMA optical beamforming is a technique which separates light-emitting diode light spa-tially and focuses each part on different target devices simultaneously. We show the experimental results of the VLC signal amplitudes, the optical power densities, and the bit-error rate performance as a function of transmission distance before and after the SDMA optical beamforming. The results show that the VLC signal amplitudes and optical power densities are improved by 8–2 and 3.8–5 dB, respectively, with the help of SDMA optical beamforming.
060.2605 Free-space optical communication 200.2605 Free-space optical communication Chinese Optics Letters
2014, 12(12): 120601
