Experimental demonstration of optical wireless power transfer with a DC-to-DC transfer efficiency of 12.1%

Sung-Man Kim; Dong-Hun Rhee

doi:10.1117/1.OE.57.8.086108

14 August 2018 Experimental demonstration of optical wireless power transfer with a DC-to-DC transfer efficiency of 12.1%

Sung-Man Kim, Dong-Hun Rhee

Author Affiliations +

Optical Engineering, Vol. 57, Issue 8, 086108 (August 2018). https://doi.org/10.1117/1.OE.57.8.086108

Abstract

Optical wireless power transfer (OWPT) can be a suitable candidate for long-distance wireless power transfer. We experimentally demonstrate the OWPT using a laser diode (LD) as the optical power transmitter and two candidates for the optical power receiver: a photodiode (PD) and a solar cell. Our results show a maximum electric-to-optic conversion efficiency of 72.7% for the LD at an optimum operating voltage. The maximum optic-to-electric conversion efficiencies of the solar cell and PD are 16.7% and 6.0% (including the receiving lens loss), respectively, with optimization of load resistance. Therefore, the total back-to-back transfer efficiency is 12.1% (DC-to-DC) with the solar cell receiver. Our results show a potential attenuation of 0.006 dB/m, implying a 3-dB distance of 500 m, if the laser beam divergence challenge can be addressed.

Citation Download Citation

Sung-Man Kim and Dong-Hun Rhee "Experimental demonstration of optical wireless power transfer with a DC-to-DC transfer efficiency of 12.1%," Optical Engineering 57(8), 086108 (14 August 2018). https://doi.org/10.1117/1.OE.57.8.086108

Received: 26 May 2018; Accepted: 1 August 2018; Published: 14 August 2018

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