10m/500Mbps WDM visible light communication systems

TLDR

The authors propose a WDM visible light communication system that uses red and green laser pointer lasers with direct data modulation. The system employs wavelength‑division multiplexing and is experimentally demonstrated. Using a preamplifier and adaptive filter, the system achieves a bit‑error‑rate below 10⁻⁹ at 10 m/500 Mbps, demonstrating high‑speed, long‑distance performance with clear eye diagrams and easy installation.

Abstract

A wavelength-division-multiplexing (WDM) visible light communiction (VLC) system employing red and green laser pointer lasers (LPLs) with directly modulating data signals is proposed and experimentally demonstrated. With the assistance of preamplifier and adaptive filter at the receiving sites, low bit error rate (BER) at 10 m/500 Mbps operation is obtained for each wavelength. The use of preamplifier and adaptive filter offer significant improvements for free-space transmission performance. Improved performance of BER of <10(-9), as well as better and clear eye diagram were achieved in our proposed WDM VLC systems. LPL features create a new category of good performance with high-speed data rate, long transmission length (>5m), as well as easy handling and installation. This proposed WDM VLC system reveals a prominent one to present its advancement in simplicity and convenience to be installed.