Details

Autor(en) / Beteiligte

• Xie, Enyuan
• He, Xiangyu
• Islim, Mohamed Sufyan
• Purwita, Ardimas Andi
• McKendry, Jonathan J. D.
• Gu, Erdan
• Haas, Harald
• Dawson, Martin D.

Titel

High-Speed Visible Light Communication Based on a III-Nitride Series-Biased Micro-LED Array

Ist Teil von

• Journal of lightwave technology, 2019-02, Vol.37 (4), p.1180-1186

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2019

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• Visible light communication (VLC) using III-nitride light-emitting diodes (LEDs) offers many advantages such as license-free operation, high spatial diversity and innate security. In particular, micro-LEDs (<inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>LEDs) are strong candidates for VLC due to their high modulation bandwidths. However, the low optical power of a single <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>LED is a key factor limiting VLC performance. In this paper, we report an optimized series-biased <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>LED array to achieve higher optical power while retaining high modulation bandwidth for high-speed VLC. An example array consisting of 3 × 3 40 <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>m-in-diameter <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>LED elements is presented here. At a current density of 3200 A/cm<inline-formula><tex-math notation="LaTeX">^2</tex-math></inline-formula> in direct-current operation, the optical power and small signal 6-dB electrical modulation bandwidth of a blue-emitting series-biased <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>LED array are over 18.0 mW and 285 MHz, respectively. The data transmission capabilities of this <inline-formula><tex-math notation="LaTeX">\mu</tex-math></inline-formula>LED array are demonstrated by using on - off keying, pulse-amplitude modulation, and orthogonal frequency division multiplexing modulation formats over free space with the error-free data transmission rates of 1.95, 2.37, and 4.81 Gb/s, respectively.