By simple calculations, we show that, in presence of nonlinearities, the optimum pre-emphasis techniques correspond to either same OSNR or same nonlinear phase-shift for all channels, yielding flat spectrum near the middle of the link.
© 2004 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
M. Vasilyev, " Analysis of optimal pre-emphasis in ultra-long-haul transmission systems," in Optical Amplifiers and Their Applications/Integrated Photonics Research, Technical Digest (CD) (Optical Society of America, 2004), paper JWB18.
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