In a soliton transmission system using lumped amplifiers, pseudo phase matching allows four-wave mixing fields from soliton-soliton collisions to grow uncontrollably and inf lict severe penalties. Through numerical simulation, we show that this growth can be eliminated, or at least greatly reduced, through the use of fiber whose dispersion is tapered, either continuously or in steps, in conformity with the fiber loss curve.
© 1996 Optical Society of America
P. V. Mamyshev and L. F. Mollenauer, "Pseudo-phase-matched four-wave mixing in soliton wavelength-division multiplexing transmission," Opt. Lett. 21, 396-398 (1996)