Title :
Impact of fiber nonlinearity on duobinary-QPSK in super-Nyquist WDM transmission
Author :
Oyama, Tsutomu ; Tanimura, Takahito ; Nakashima, Hideharu ; Hoshida, Takeshi ; Zhenning Tao ; Rasmussen, Jens C.
Author_Institution :
Fujitsu Labs. Ltd., Kawasaki, Japan
Abstract :
We numerically confirm that duobinary-pulse format suffers larger nonlinear impairment than NRZ and Nyquist-pulse formats. Nonlinearity-induced penalty, however, is found to be constant against the channel spacing in super-Nyquist WDM transmission. Also, we evaluate the benefit of digital nonlinear compensation.
Keywords :
Nyquist criterion; optical modulation; quadrature phase shift keying; wavelength division multiplexing; NRZ formats; Nyquist-pulse formats; channel spacing; digital nonlinear compensation; duobinary-QPSK; duobinary-pulse format; fiber nonlinearity; nonlinearity-induced penalty; super-Nyquist WDM transmission; Channel spacing; Maximum likelihood estimation; Noise; Optical fiber communication; Optical signal processing; Q-factor; Wavelength division multiplexing;
Conference_Titel :
Optical Communication (ECOC), 2014 European Conference on
Conference_Location :
Cannes
DOI :
10.1109/ECOC.2014.6963966
