Author(s)

Lijun Zhang, Zhijuan Chi, Qingan Ding, Changqing Liu, Juan Song and Bowen Nie

Corresponding Author

Qingan Ding

ABSTRACT

Due to the increasing demand for bandwidth of current 5G applications, in order to make better use of optical millimeter wave resources this paper proposes a radio over fiber (RoF) - wavelength division multiplexing (WDM) - passive optical network (RoF-WDM-PON) architecture based on coherent detection and polarization multiplexing technology. The dual-polarized Mach-Zehnder Modulator (DP-MZM) was used to combine the wired and wireless signals modulated by different signal sources from Optical Line Terminal (OLT) in the same optical fiber through polarization multiplexing technology for the downlink transmission. And the Optical Network Unit (ONU) can implement the two signal distribution processing through coherent detection technology that improves receiver sensitivity and system performance. The 56-Gbit/s wired signal, 5-Gbit/s wireless signal for downlink, and 56-Gbit/s wired upstream signal and 2.5-Gbit/s wireless upstream signal have been transmitted over 30-km single mode fiber (SMF) successfully. Eventually we assess the performance of the RoF-WDM-PON system with the help of error vector magnitude constellations and eye diagram.

KEYWORDS

Radio over fiber (RoF); Passive Optical Network (PON); Wavelength division multiplexing(WDM); coherent detection; polarization multiplexing