Design of radio-over-fiber passive optical network for wireless and wireline access

Radio-over-Fiber Passive Optical Network (RoF-PON) system for simultaneous wired and wireless access is a credible architecture for high speed, cost effective, large bandwidth deployment schemes. The primary objective is to use Dual Phase Quadrature Phase Shift Keying (DP-QPSK) to deploy speeds of 10Gbps. The DP-QPSK modulated input data stream at almost 10Gbps is transmitted from an Optical Line Terminal (OLT), through an optical fiber and is received by an Optical Network Unit (ONU) at 10Gbps after splitting the power for the synchronous wired and wireless transmissions. Another attribute is the generation of the 60GHz RF carrier frequency required for the wireless transmission using a 5GHz sine signal and by harvesting the non-linear characteristics of the Mach-Zehnder Modulator. This eliminates the need for a separate Radio Frequency carrier pump. The RF carrier is generated only when the data is transmitted, thus restricting the power consumed during the operation, adding more leverage to the system.