Title :
Impact of SBS on CPFSK coherent transmission systems using dispersion-shifted fiber
Author :
Sugie, Toshihiko
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
Abstract :
The effects of stimulated Brillouin scattering (SBS) from dispersion-shifted fiber on the transmission characteristics of a 2.5 Gb/s continuous phase frequency shift keying (CPFSK) repeaterless transmission system using EDF-booster amplifiers are described. It is confirmed that power penalty degradations are caused by the received signal spectrum, in which the spectrum components exceeding the SBS threshold are lost, and the deviation of the intermediate frequency (IF) from the optimum value. The penalty can be improved by increasing signal randomness.<>
Keywords :
erbium; fibre lasers; frequency shift keying; optical dispersion; optical links; optical modulation; stimulated Brillouin scattering; 2.5 Gbit/s; CPFSK coherent transmission systems; EDF-booster amplifiers; Er-doped fibre amplifiers; SBS threshold; continuous phase frequency shift keying; dispersion-shifted fiber; intermediate frequency; optimum value; power penalty degradations; received signal spectrum; repeaterless transmission system; signal randomness; spectrum components; stimulated Brillouin scattering; transmission characteristics; Brillouin scattering; Degradation; Diodes; Dispersion; Frequency; Optical fiber polarization; Power generation; Pulse amplifiers; Refractive index; Repeaters;
Journal_Title :
Photonics Technology Letters, IEEE
