Dispersion-Management  No dispersion-zero point Total accumulated dispersion near zero
Dispersion Management  Dispersion map for dispersion- compensating fiber (DCF) Small core area
New Type of Fibers Large effective area fiber Nonzero dispersion shifted fiber (NZ-DSF) http://www.corning.com/opticalfiber/products__services/reprints/r1083.asp large-effective-area fiber (red) suppressed four-wave mixing crosstalk to -22.5 dB, compared to -19.0 dB for NZ-DSF fiber (blue).
References  G.Agrawal “Nonlinear Fiber Optics”, 3rd edition  G Agrawal “Fiber-Optics Communication Systems” 3rd edition  Nori Sibata, Ralf Braun and Robert Waarts, IEEE J. Quantum Electron. QE23, 1205, 1987  Ivan Kaminow and Thomas Koch, OFT IIIA  C. Mahon, L. Olofsson, E. Bodtker, G. Jacobsen, IEEE Photon. Tech. Lett. 8,575, 1996  F. Forghieri, R. Tkach, A. Chroplyvy, J. Lightwave Tech, 13, 889 1995  R. Tkach, R. Derosier and et. al, IEEE Photon. Tech. Lett. 7, 1369, 1995