The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Simultaneous Transmission of Optical Wireless Power Transfer and Optical Wireless Communication using a Laser Diode

레이저 기반의 광 무선충전 및 광 무선통신의 동시전송

  • 신재우 (경성대학교 전자공학과) ;
  • 윤태욱 (경성대학교 전자공학과) ;
  • 김성만 (경성대학교 전자공학과)
  • Received : 2021.05.04
  • Accepted : 2021.08.17
  • Published : 2021.08.31
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Abstract

Wireless charging method using a laser is considered as the most efficient method at a long distance of the wireless charging method. Combining long-range laser wireless charging technology with wireless communication technology will make it possible to use it for a variety of applications. Accordingly, this paper shows the results of research and experiments on wireless charging and wireless communication simultaneously based on a laser. This technique uses a laser as a light source for E/O(: Electric-to-Optical) conversion at the transmitter for optical wireless power transmission. In the experimental results, the optical power transmission using a 100 mW laser transmitter and a solar cells receiver showed a DC-to-DC efficiency of 1.9 %, wireless optical communication showed a transmission speed of up to 90 kbps when the transmission distance is 15 m.

현재까지 알려진 무선충전 방식 중에서 장거리에서 가장 효율이 좋은 방식은 레이저를 이용한 방식이다. 여기에 레이저를 이용한 무선통신 기술을 결합한다면 다양한 분야에 활용이 가능할 것이다. 이에 본 논문에서는 레이저를 이용한 무선충전 및 무선통신의 동시전송 기술에 관하여 연구하고 이에 대한 실험 결과를 보인다. 이 기술은 광 무선충전을 위해서 송신부에 전/광 변환을 위한 레이저 광원을 사용하고 수신부에는 광/전 변환을 위한 태양전지를 사용한다. 또한, 광 무선통신을 위해 해당 레이저 광신호에 반송파를 이용하여 신호를 송신하는 방식이다. 본 논문에서는 실험을 통해 100 mW 레이저 송신부와 태양전지 수신부를 이용하여 광 무선충전은 1.9 %의 DC-to-DC 효율을 보였으며, 무선 광통신은 전송거리가 15 m일때 최대 90 kbps의 전송속도를 보였다.

Keywords

Acknowledgement

본 논문은 정부(과학기술정보통신부, 교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임 (No. NRF-2019R1F1A1045956 and NRF-2021R1I1A3047031).

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