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

Sung-Man Kim; Jongmyeong Choi; Hyunwoo Jung

doi:10.3788/COL201816.080101

Journals >Chinese Optics Letters >Volume 16 >Issue 8 >Page 080101 > Article

Chinese Optics Letters
Vol. 16, Issue 8, 080101 (2018)

Experimental demonstration of underwater optical wireless power transfer using a laser diode | On the Cover

Sung-Man Kim^*, Jongmyeong Choi, and Hyunwoo Jung

Author Affiliations

Department of Electronic Engineering, Kyungsung University, Nam-Gu, Busan 48434, Korea

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DOI: 10.3788/COL201816.080101 Cite this Article Set citation alerts

Sung-Man Kim, Jongmyeong Choi, Hyunwoo Jung. Experimental demonstration of underwater optical wireless power transfer using a laser diode[J]. Chinese Optics Letters, 2018, 16(8): 080101 Copy Citation Text

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Abstract

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.

C_{E / O} = \frac{P_{Ot 1}}{P_{Et}} .

(1)

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R_{dr} = \frac{P_{Ot 2}}{P_{Ot 1}} .

(2)

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R_{ac} = \frac{P_{Or 2}}{P_{Or 1}} .

(3)

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C_{O / E} = \frac{P_{Er}}{P_{Or 2}} .

(4)

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P_{Or 1} = P_{Ot 2} \cdot \exp (- α L),

(5)

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E_{DC - to - DC} = C_{E / O} \cdot R_{dr} \cdot R_{ac} \cdot C_{O / E} \cdot \exp (- α L) .

(6)

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E_{B to B} = C_{E / O} \cdot C_{O / E} .

(7)

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E_{sea water} = C_{E / O} \cdot R_{dr} \cdot R_{ac} \cdot C_{O / E} \cdot \exp (- 0.69 \cdot L),

(8)

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E_{sea water} = 4.3 % \cdot \exp (- 0.69 \cdot L) .

(9)

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Sung-Man Kim, Jongmyeong Choi, Hyunwoo Jung. Experimental demonstration of underwater optical wireless power transfer using a laser diode[J]. Chinese Optics Letters, 2018, 16(8): 080101

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