Evaluating SOA Nonlinearity Effects by High-Order Susceptibility on Constant Envelope Signals in WDM Systems
BETTI, Silvello ; DUCA, Elisa ; - ASI Sponsor
Jan - 2009
ISSN : 0733-8724 ;
journal : Journal of lightwave technology

Issue : 21-24
type: Article Journal

Nonlinearity effects, arising within a semiconductor optical amplifier (SOA), have been deeply investigated with particular interest for exploiting them in wavelength conversion. This application shrinks the research area to a precise scenario: a strong pump signal travels through the active medium simultaneously with a modulated signal to be converted. In this case, it is possible to neglect the spectral distribution of the optical power and phase relationship between propagating signals. SOAs have been also studied as line amplifiers for wavelength-division multiplexing (WDM) phase-modulated signals. Aim of this paper is to extend the propagation model in an SOA, in order to simulate nonlinearities occurring in the amplification of a WDM comb signal evaluating-wave mixing on constant envelope modulation schemes (differential phase-shift keying). This can be carried out due to an enhanced analytical model based on the optical field and medium interaction, overcoming the wide-used rate equation approach, which is based on the overall photons density.

keywords : Amplificateur optique semiconducteur,Analytical method,Campo \optico,Champ optique,Communication fibre optique,Conversion fr\equence,Conversi\on frecuencia,Cross gain modulation,Cross phase modulation,Cross-gain modulation (XGM),Crosstalk,Diafon\\ia,Diaphonie,Differential phase shift keying,Ecuaci\on velocidad,Efecto no lineal,Effet non lin\eaire,Elisa Duca: ASI author,Equation vitesse,Fen\omeno no lineal,Four wave mixing,Frequency conversion,Mezcla 4 ondas,Mezcla onda,Mezcla senal,Modulaci\on de ganancia cruzada,Modulaci\on fase,Modulaci\on fase cruzada,Modulated signal,Modulation de gain crois\e,Modulation d\eplacement phase diff\erentielle,Modulation phase,Modulation phase crois\ee,Multiplaje longitud onda,Multiplexage longueur onde,M\elange 4 ondes,M\elange onde,M\elange signal,M\ethode analytique,M\etodo anal\\itico,Non linear effect,Non linear phenomenon,Optical fiber communication,Optical field,Phase modulation,Ph\enomene non lin\eaire,Procesamiento senal,Rate equation,Semiconductor optical amplifiers,Senal modulada,Signal mixing,Signal modul\e,Signal processing,Traitement signal,Wave mixing,Wavelength division multiplexing,cross-phase modulation (XPM),differential phase-shift keying (DPSK),four-wave mixing (FWM),nonlinear crosstalk,nonlinear effects,semiconductor optical amplifier (SOA),susceptibility,wavelength-division multiplexing (WDM)