Abstract
The performance of an optical wavelength-division multi- plexed system is analyzed taking the four-wave mixing (FWM) effect into account. The efficiency of FWM generation is observed to greatly reduce if the spacing between channels is made unequal. However, the scheme requires an increased bandwidth, which can further be reduced by utiliz- ing another scheme called repeated unequal channel spacing. Also the FWM efficiency is found to reduce in the presence of chromatic disper- sion. Use of nonuniform chromatic dispersion along the fiber length, which reduces the FWM effect while maintaining a low value of disper- sion is investigated. Various other dispersion management mechanisms are also considered in addition to different channel spacing schemes to achieve a comparative study as to which scheme gives the best solution to the FWM problem. © 2003 Society of Photo-Optical Instrumentation Engineers.
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