Title :
Impact of MPI and modulation format on transmission systems employing distributed Raman amplification
Author :
Fludger, C.R.S. ; Zhu, Y. ; Handerek, V. ; Mears, R.J.
Author_Institution :
Nortel Networks UK Ltd., Harlow, UK
fDate :
7/19/2001 12:00:00 AM
Abstract :
Measurements are performed of the impact of multipath interference (MPI) on a 40 Gbit/s CS-RZ system due to double Rayleigh scatter (DRS) noise. A new numerical simulation method for predicting the impact on Q of DRS noise in distributed Raman amplified systems, taking into account the pulse shape and modulation format, is also described. A simple analytical expression is presented which gives good agreement with the numerical simulation and includes modulation format and filtering. RZ formats are shown to be 1.5 to 2 dB more immune to MPI than NRZ formats
Keywords :
Raman lasers; Rayleigh scattering; light interference; optical fibre communication; optical modulation; optical noise; 40 Gbit/s; CS-RZ system; distributed Raman amplification; distributed Raman amplified systems; double Rayleigh scatter noise; modulation format; multipath interference; numerical simulation method; pulse shape; transmission systems;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010659
