Title :
Pump-wavelength detuning method for forward pumped distributed Raman amplification systems
Author :
Masuda, H. ; Sato, K. ; Hirano, A. ; Miyamoto, Y.
Author_Institution :
NTT Network Innovation Labs., NTT Corp., Kanagawa, Japan
fDate :
5/12/2005 12:00:00 AM
Abstract :
A novel method is proposed for suppressing the excess noise caused by non-degenerate four-wave-mixing and RIN transfer between signal and pump lights in a forward pumped distributed Raman amplification system. Optical SNR and Q-factor improvements of 2.5 and 2.0 dB at a Raman gain of 7 dB, respectively, are successfully confirmed for L-band signals in a WDM transmission experiment over DSF.
Keywords :
Q-factor; Raman lasers; laser noise; multiwave mixing; optical fibres; optical pumping; optical tuning; wavelength division multiplexing; 7 dB; L-band signals; Q-factor improvements; RIN transfer; WDM transmission; dispersion shifted fibre; excess noise; forward pumped distributed Raman amplification systems; nondegenerate four-wave-mixing; optical SNR improvement; pump-wavelength detuning;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20050450
