Title :
1.5 terabit/s submarine 4000 km system validation over a deployed line with industrial margins using 25 GHz channel spacing and NRZ format over NZDSF
Author :
Vareille, G. ; Ait Sab, O. ; Bassier, G. ; Collet, J.P. ; Julien, B. ; Dufournet, D. ; Pitel, F. ; Marcerou, J.F.
Abstract :
We have transmitted 1.5 Tbit/s over a deployed line of 4000 km of NZDSF using only C-band EDFAs with 25 GHz spacing and NRZ modulation format. The average performance obtained correspond to a 4.8 dB margin for a system designed with Enhanced 7% redundancy FEC scheme based on concatenated Reed-Solomon code. This experiment demonstrates for the first time the industrial feasibility of a 1.5 Tbit/s regional network transmission which is compatible with 0.4 (bit/s)/Hz. The use of NRZ format has two advantages. The first one is a low cost and compact terminal equipment due to less modulation stages compared to RZ or CRZ. The second one is a better compatibility with high channel density allowing simpler and lower cost repeaters for a given capacity. Furthermore, the demonstration of the excellent robustness of NRZ format over NZDSF allow direct field deployment or upgrades.
Keywords :
Reed-Solomon codes; forward error correction; optical cables; optical fibre amplifiers; optical repeaters; submarine cables; 1.5 Tbit/s; C-band EDFAs; GHz spacing; NRZ format; NRZ modulation format; NZDSF; Tbit/s regional network transmission; average performance; compact terminal equipment; concatenated Reed-Solomon code; enhanced redundancy FEC scheme; industrial feasibility; lower cost optical repeaters; Channel spacing; Costs; Dispersion; Forward error correction; Optical fiber polarization; Optical fiber testing; Optical signal processing; Q factor; Transmitters; Underwater vehicles;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036370