Title :
Optimum fiber dispersion for two-step dispersion-allocated optical soliton, RZ at zero GVD and NRZ systems
Author :
Sahara, Akio ; Kubota, Hirokazu ; Nakazawa, Masataka
Author_Institution :
NTT Access Network Syst. Lab., Opt. Soliton Commun. Res. Group, Ibaraki, Japan
Abstract :
The optimum fiber dispersion conditions for two-step dispersion-allocated (D-A) optical soliton and nonreturn-to-zero (NRZ) systems are derived numerically. The transmission speed is 20 Gb/s, the amplifier spacing is SO km, and the two fiber segment lengths are 30 km and 50 km. The maximum transmission distance for a D-A soliton system can be obtained at an average dispersion of 0.1 ps/km/nm. The dispersion of the first fiber segment is 3.1 ps/km/nm. For an NRZ system, the maximum transmission distance can be obtained at zero average dispersion, in which the dispersion of the first segment is -2 ps/km/nm. The optimum average dispersion strongly depends on the dispersion allocation and on whether a soliton or an NRZ system is used.
Keywords :
optical fibre communication; optical fibre dispersion; optical fibre polarisation; optical modulation; optical solitons; optimisation; 20 Gbit/s; 30 km; 50 km; 80 km; D-A soliton system; NRZ system; NRZ systems; amplifier spacing; average dispersion; dispersion allocation; fiber segment lengths; first fiber segment; maximum transmission distance; optimum average dispersion; optimum fiber dispersion; optimum fiber dispersion conditions; transmission speed; two-step dispersion-allocated optical soliton; zero average dispersion; Bandwidth; Erbium-doped fiber amplifier; Nonlinear equations; Optical fiber communication; Optical fiber dispersion; Optical filters; Optical modulation; Optical signal processing; Optical solitons; Polarization mode dispersion;
Journal_Title :
Photonics Technology Letters, IEEE
