Journal
OPTICS EXPRESS
Volume 30, Issue 17, Pages 31509-31517Publisher
Optica Publishing Group
DOI: 10.1364/OE.470740
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Six junction GaAs laser power converters (LPCs) were designed and fabricated, demonstrating good performance. The maximum conversion efficiency reached 57.7%, with an output power of 15.4 W and continuous stable operation for over 550 hours. Additionally, a large-scale array of LPCs was developed, achieving an output power of 179 W under 1 kW laser irradiation.
Six junction GaAs laser power converts (LPCs) were designed and fabricated. Each subcell is vertically connected by p++-AlGaAs: C/n++-AlGaAs: Si: Te (1:2) tunnel junction with good thermal stability and a record peak tunneling current density of 1867 A/cm(2). The I-V characteristics of LPCs with an aperture of 10x10 mm(2) were investigated as a function of laser power and temperature. Maximum conversion efficiency and output power of 57.7% and 15.4 W, respectively, and a continuous stable operation at 22.9 W for over 550 hours were demonstrated. The temperature coefficient of conversion efficiency and open-circuit voltage were -0.197%absrC and -8.15 mV/degrees C, respectively, under 808 nm laser illumination of 21.0 W. Furthermore, an array of 100 large-scale (41x46 mm 2 ) LPCs with an output power of 179 W under 1 kW laser irradiation at 20 m wireless transmission was developed. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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