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High-speed integrated micro-LED array for visible light communication
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DOI：10.1364/OL.391566.png)
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In this Letter, we report high-speed integrated 14 mu m in diameter micro-light-emitting diode (ILED) arrays with the parallel configuration, including 2 x 2, 2 x 3, 2 x 4, and 2 x 5 arrays. The small junction area of mu LED (similar to 191 mu m(2)) in each element facilitates the operation of higher injection current density up to 13 kA/cm(2), leading to the highest modulation bandwidth of 615 MHz. The optical power of 2 x 5 array monotonically increases (similar to 10 times higher) as the number of arrays increases (1 to 10), while retaining the fast modulation bandwidth. A dear eye diagram up to 1 Gbps without any equalizer further shows the capability of this high-speed transmitter for VLC. These results mean that tailoring the optical power of mu LEDs in a parallel-biased integrated array can further enhance the data transmission rate without degradation of the modulation bandwidth. (C) 2020 Optical Society of America
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3.3
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