Hybrid WDM POF-VLC links for M-QAM Signal Transmission Based on Centralized Laser Diodes for Smart Factories

A centralized single source for hybrid fiber/wireless visible communication links is demonstrated employing off-the-shelf components. Experimental transmission of QPSK and M-QAM signals over wavelength-division-multiplexed (WDM) optical carriers emitted by two laser diodes in the visible spectrum leads to 6 Gb/s total bitrate. The system performance characterization in terms of SNR and EVM for different modulation formats and bandwidths paves the way for future deployment in industrial environments.