Digitally Controlled Micro-LED Array for Linear Visible Light Communication Systems

Author

Qian, H. ; Zhao, S. ; Cai, S.Z. ; Zhou, T.

Author_Institution

Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China

Volume

7

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

8

Abstract

In a visible light communications (VLC) system, the frequency response of the light-emitting diode (LED) limits the signal bandwidth and, thus, becomes the bottleneck of the transmission data rate. The recent technology breakthrough of the micro-LED array has the potential to improve the modulation bandwidth of the LED by ten times. On the other hand, the nonlinearity of the micro-LED array is significant. Nonlinear distortion degrades system performance in both the achievable data rate and the transmission range. In this paper, we propose a digitally controlled micro-LED array architecture for the VLC system, which enjoys the benefit of wide modulation bandwidth of the micro-LED array and avoids the disadvantage of the nonlinear distortion. Compared with existing multiple LED structures, the proposed micro-LED array architecture shows robustness against nonlinear distortion.

Keywords

integrated optoelectronics; light emitting diodes; nonlinear distortion; optical arrays; optical transmitters; VLC; digitally controlled microLED array; frequency response; light emitting diode; linear visible light communication systems; modulation bandwidth; nonlinear LED transmitter; nonlinear distortion; signal bandwidth; transmission data rate; Arrays; Bandwidth; Bit error rate; Dynamic range; Light emitting diodes; Modulation; Nonlinear distortion; Light-emitting diode (LED); light emitting diode (LED); micro-LED array; nonlinearity; visible light communications;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2015.2424398

Filename

7089173