WDM transmission links with dispersion management by linearly or nonlinearly incremented RDPS and midway optical phase conjugation

Abstract

This paper proposes and discusses a flexible dispersion-managed link configuration comprising artificial distributions of linearly/nonlinearly incremented residual dispersion per span (RDPS), and an optical phase conjugator added at the midway. Regardless of the incremental scheme, the best distribution for compensating the distorted-wavelength multiplex signals is the simultaneous descending and ascending distribution of the RDPSs before and after the optical phase conjugator, respectively. Consequently, by artificially distributing the RDPSs according to span length, total transmission length, signal launch power, and the number of wavelength-division multiplexed channels, a flexible implementation of the optical links using the linearly or nonlinearly incremented RDPSs should be possible.