Abstract
We investigate a novel GaAs-based laser power converters (LPCs) grown by metal-organic chemical vapor deposition (MOCVD), which uses a single monolithic structure with six junctions connected by tunnel junctions to obtain a high output voltage. The LPCs with diameters of active aperture of 2 mm and 4 mm were fabricated and tested. The test results show that under an 808 nm laser, two LPCs both show an open circuit voltage of above 6.5 V. A maximum power conversion efficiency of 50.2% is obtained by 2 mm sample with laser power of 0.256 W, and an output electric power of 1.9 W with laser power of 4.85 W is obtained by 4 mm sample. The performances of the LPCs are deteriorated under illumination of high flux, and the 4 mm sample shows a higher laser power tolerance.
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This work has been supported by the National Natural Science Foundation of China (Nos.61376065 and 61604171), and Zhongtian Technology Group Co. Ltd.
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Sun, Yr., Dong, Jr., He, Y. et al. A six-junction GaAs laser power converter with different sizes of active aperture. Optoelectron. Lett. 13, 21–24 (2017). https://doi.org/10.1007/s11801-016-6193-8
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DOI: https://doi.org/10.1007/s11801-016-6193-8