Q-factor analysis of nonlinear impairments in ultrahigh-speed Nyquist pulse transmission

Optics Express
T Hirooka, Masataka Nakazawa

Abstract

We present detailed analytical and numerical results of the dispersion and nonlinear tolerances of RZ and Nyquist optical pulses in ultrahigh-speed TDM transmissions. From a Q-map analysis, i.e. by numerically calculating the Q-factor distribution as a function of transmission power and fiber dispersion, we found that Nyquist TDM transmission has a substantially larger Q margin as regards both dispersion and optical power thanks to ISI-free overlapped TDM. We also show that the optimum transmission power for Nyquist pulses is 2 dB lower than for RZ pulses. An analytical model is provided to explain the overlap-induced nonlinear impairments in Nyquist TDM transmission in a high power regime, which agrees well with numerical results.

References

Feb 23, 2010·Optics Express·Hans Christian Hansen MulvadPalle Jeppesen
Jan 26, 2012·Optics Express·Masataka NakazawaPengyu Guan
Oct 6, 2012·Optics Express·Toshihiko Hirooka, Masataka Nakazawa

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