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Optical Wireless Power Transmission under Deep Seawater Using GaInP Solar Cells

Author

Listed:
  • Ryusei Takahashi

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

  • Shunki Hayashi

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

  • Kosuke Watanabe

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

  • Li Jikun

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

  • Takehiro Iida

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

  • Junichi Suzuki

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

  • Shiro Uchida

    (Department of Advanced Materials Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino 275-0016, Japan)

Abstract

Optical wireless power transmission (OWPT) attracts attention because it enables wireless power transfer over longer distances than current wireless power transfer methods, irradiating laser light to a light-receiving element. In this study, an OWPT system was investigated under water and deep seawater using visible lasers with low optical absorption loss in water. Three laser beams (450 nm, 532 nm, and 635 nm) were transmitted through 30 cm, 60 cm, and 90 cm long tanks filled with tap water and deep seawater and were irradiated to 1.0 × 1.0 cm 2 GaInP solar cells. The light reaching rate ( η op ) of laser light and the system efficiency ( η sys ) of the system (excluding the laser efficiency) were investigated. GaInP solar cells showed photo-electric conversion efficiencies of 30.6%, 40.3%, and 39.3% for 450 nm, 532 nm, and 635 nm irradiations, respectively. As a result, a 532 nm laser through a 90 cm water tank in tap water showed a 78.4% η op and a 30.8% η sys . Under deep seawater, a 532 nm laser through a 90 cm tank exhibited a 58.3% η op and a 23.5% η sys . A 532 nm green laser showed a higher efficiency than the other 450 nm and 635 nm lasers in this underwater system using GaInP solar cells.

Suggested Citation

  • Ryusei Takahashi & Shunki Hayashi & Kosuke Watanabe & Li Jikun & Takehiro Iida & Junichi Suzuki & Shiro Uchida, 2024. "Optical Wireless Power Transmission under Deep Seawater Using GaInP Solar Cells," Energies, MDPI, vol. 17(7), pages 1-10, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:7:p:1572-:d:1363840
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    References listed on IDEAS

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    1. Yuha Tai & Tomoyuki Miyamoto, 2022. "Experimental Characterization of High Tolerance to Beam Irradiation Conditions of Light Beam Power Receiving Module for Optical Wireless Power Transmission Equipped with a Fly-Eye Lens System," Energies, MDPI, vol. 15(19), pages 1-17, October.
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