Enhancement of hybrid TWDM PON system using ring topology with properly rated raised cosine filter and multistage Lorentzian filter in OADM
摘要
As the demand for an effective transmission link is increasing day by day, there is a need for a highly efficient network. In the proposed work, a highly reliable and effective hybrid passive optical network (PON) is investigated using a ring topology. A ring topology is an effective technique for data transmission in long-haul communication in a hybrid PON. It protects the network against fiber failure. In this work, 10 Gbps data is successfully transmitted over variable lengths of fiber, 50 km, 100 km, 150 km, 200 km, and 250 km, using a 1550 nm wavelength with 0 dBm power level. Effective bandwidth utilization is achieved by OADM. The overall efficiency of proposed network is enhanced by improving the quality of raised cosine filter at receiver section and multistage Lorentzian filter in OADM. The results show that with an increased roll-off factor maintained by raised cosine filter and an increased number of stages used in a multistage Lorentzian filter, gives better performance in long-haul communication. A maximum Q factor of 35.77 and minimum BER of 2.3 × 10–42 is achieved by system with roll-off factor of 0.5 maintained by a raised cosine filter and order (N) equals to 15, maintained by a multistage Lorentzian filter. Instead of using additional components in ring topology, by improving the efficiency of internal components of OADM and receiver section, the quality of data transmission is enhanced in the network with minimum attenuation.