2.5 Gb/s hybrid WDM/TDM PON using radio over fiber technique

摘要

Hybrid gigabit-passive optical network (GPON) is a hybrid passive optical network, where wavelength division multiplexing (WDM) GPON and time division multiplexing (TDM)-GPON are integrated into a single passive optical network, reducing cost and increasing the data rate. In this paper, 2.5 Gb/s GPON downstream link is presented, using the radio over fiber (RoF) technique in GPON network architecture. It has been done by means of commercial OptiSystem simulation software, where, differential phase shift keying (DPSK) modulation is proposed by using 2.4 GHz radio frequency. The propagation of radio signals along a 25 km standard single mode fiber (SMF) investigated. The simulated model can support 32 and 64 users. The analysis was made based on the performance of eye diagram, optical signal to noise ratio (OSNR), constellation diagram, error vector magnitude (EVM) and received power.