J. Kani et al., Interwavelength-band nonlinear interactions and their suppression in multiwavelength-band WDM transmission systems, J LIGHTW T, 17(11), 1999, pp. 2249-2260
We describe the effects of interwavelength-band nonlinear interactions, suc
h as nondegenerate four-wave mixing, stimulated Raman scattering, and cross
-phase modulation in multiwavelength-band WDM transmission systems. Through
both numerical analysis and transmission experiments, these interactions a
re shown to cause serious degradation, especially when the walk-off between
the utilized wavelength bands is small. Focusing on suppressing both these
interwavelength-band nonlinear interactions and traditional intrawavelengt
h-band nonlinear interactions, we present the guidelines for designing ultr
a wide-band WDM transmission systems over various types of fibers. The guid
elines include band-by-band bidirectional transmission, which offers large
walk-off and minimizes the degradation caused by interwavelength-band nonli
near interactions. Finally, several dual-wavelength-band transmissions over
dispersion-shifted fibers and standard single-mode fibers are demonstrated
according to the guidelines.