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- Transience analysis of bursty traffic with erbium doped fiber amplifiersPublication . Reis, Cláudia; Neto, Berta; Dionísio, Rogério Pais; Incerti, G.I.; Tosi-Beleffi, G.; Forin, D.; Teixeira, António; Rocha, A.M.; André, P.S.In this paper, we investigate experimentally the impact of optical amplifiers, namely Erbium Doped Fiber Amplifiers (EDFA) on Optical Burst Switching (OBS) networks, operating at 2.5 Gb/s (typical bit rate for current passive optical networks - PON). Bursts with 212 – 1 and 216 – 1 pseudo random binary sequence (PRBS) were studied, with different idle times. The use of traffic with variable idle time was assessed in order to evaluate the effect on the burst initial amplitude. We also analyzed the performance of the packet based system by measuring the Q factor at the receiver and concluded that the performance is not affected by the type of traffic (variable or fixed idle times).
- Comparative analysis of hybrid in line EDFA/Raman with simple raman amplification in WDM ring PON for C+L bandPublication . Neto, Berta; Rocha, A.M.; Girão, J.P.; Dionísio, Rogério Pais; Reis, Cláudia; Chatzi, S.; Bonada, F.; Lazaro, J.; Teixeira, António; André, P.S.In this paper, we investigate through simulation the feasibility of amplification solutions for WDM ring PON encompassing C+L transmission bands. The system under analysis is composed by a bidirectional pump at 1480 nm with 1 W of power in each direction and 16 channels (8 C band + 8 L band). The simulation describes an 80 km WDM ring with 8 nodes in which 2 channels are added/dropped. Two scenarios were implemented, one with simple Raman amplification that considers that all the pump power travels along the ring being selected the optimal order to drop channels and another with C- band in line EDFA in the link mid length that performs and additional amplification on C band signals. The results of both approaches are compared and their suitability for practical PON is analyzed.
- C+L band gain equalization for extended reach WDM-ring PON using hybrid Raman/in line EDFA amplificationPublication . Neto, Berta; Rocha, A.M.; Girão, J.P.; Dionísio, Rogério Pais; Reis, Cláudia; Chatzi, S.; Bonada, F.; Lazaro, J.; Teixeira, António; André, P.S.In this paper, we investigate by simulation the feasibility of gain enlargement and equalization on extended reach WDM-ring PON by means of hybrid Raman/EDFA amplification. The system under analysis is composed by a bidirectional pump at 1480 nm and 16 channels (8 C band + 8 L band). The simulation describes an 80 km WDM ring with 8 nodes in which 2 channels are added/dropped. The results demonstrate gain equalization with a ripple of 2.54 dB over a bandwidth of 50 nm by using a 1480 nm bidirectional pump with 1 W and spans of EDF with a total length of 22 m.