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Proceedings Paper

Characterization of high performance silicon-based VMJ PV cells for laser power transmission applications
Author(s): Mico Perales; Mei-huan Yang; Cheng-liang Wu; Chin-wei Hsu; Wei-sheng Chao; Kun-hsien Chen; Terry Zahuranec
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Paper Abstract

Continuing improvements in the cost and power of laser diodes have been critical in launching the emerging fields of power over fiber (PoF), and laser power beaming. Laser power is transmitted either over fiber (for PoF), or through free space (power beaming), and is converted to electricity by photovoltaic cells designed to efficiently convert the laser light. MH GoPower’s vertical multi-junction (VMJ) PV cell, designed for high intensity photovoltaic applications, is fueling the emergence of this market, by enabling unparalleled photovoltaic receiver flexibility in voltage, cell size, and power output. Our research examined the use of the VMJ PV cell for laser power transmission applications. We fully characterized the performance of the VMJ PV cell under various laser conditions, including multiple near IR wavelengths and light intensities up to tens of watts per cm2. Results indicated VMJ PV cell efficiency over 40% for 9xx nm wavelengths, at laser power densities near 30 W/cm2. We also investigated the impact of the physical dimensions (length, width, and height) of the VMJ PV cell on its performance, showing similarly high performance across a wide range of cell dimensions. We then evaluated the VMJ PV cell performance within the power over fiber application, examining the cell’s effectiveness in receiver packages that deliver target voltage, intensity, and power levels. By designing and characterizing multiple receivers, we illustrated techniques for packaging the VMJ PV cell for achieving high performance (> 30%), high power (> 185 W), and target voltages for power over fiber applications.

Paper Details

Date Published: 4 March 2016
PDF: 17 pages
Proc. SPIE 9733, High-Power Diode Laser Technology and Applications XIV, 97330U (4 March 2016); doi: 10.1117/12.2213886
Show Author Affiliations
Mico Perales, MH GoPower Co., Ltd. (Taiwan)
Mei-huan Yang, MH GoPower Co., Ltd. (Taiwan)
Cheng-liang Wu, MH GoPower Co., Ltd. (Taiwan)
Chin-wei Hsu, MH GoPower Co., Ltd. (Taiwan)
Wei-sheng Chao, MH GoPower Co., Ltd. (Taiwan)
Kun-hsien Chen, MH GoPower Co., Ltd. (Taiwan)
Terry Zahuranec, MH GoPower Co., Ltd. (Taiwan)

Published in SPIE Proceedings Vol. 9733:
High-Power Diode Laser Technology and Applications XIV
Mark S. Zediker, Editor(s)

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