16 March 2015 Five-volt vertically-stacked, single-cell GaAs photonic power converter
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The high-efficiency conversion of photonic power into electrical power is of broad-range applicability to many industries due to its electrical isolation from the surrounding environment and immunity to electromagnetic interference which affects the performance and reliability of sensitive electronics. A photonic power converter, or phototransducer, can absorb several watts of infrared laser power transmitted through a multimode fiber and convert this to electrical power for remote use. To convert this power into a useful voltage, we have designed, simulated, and fabricated a photovoltaic phototransducer that generates >5 V using a monolithic, lattice-matched, vertically-stacked, single-cell device that eliminates complex fabrication and assembly steps. Experimental measurements have demonstrated a conversion efficiency of up to 60.1% under illumination of ~11 W/cm2 at a wavelength of 835 nm, while simulations indicate that efficiencies reaching 70% should be realistically achievable using this novel design.
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Christopher E. Valdivia, Matthew M. Wilkins, Boussairi Bouzazi, Abdelatif Jaouad, Vincent Aimez, Richard Arès, Denis P. Masson, Simon Fafard, Karin Hinzer, "Five-volt vertically-stacked, single-cell GaAs photonic power converter", Proc. SPIE 9358, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices IV, 93580E (16 March 2015); doi: 10.1117/12.2079824; https://doi.org/10.1117/12.2079824

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