Comparison of theory and experiment for dispersion-managed solitons in a recirculating fiber loop

Abstract

Abstract-We have developed a model that accurately predicts the dynamics of the signal pulses and the growth of amplified spontaneous emission noise in a dispersion-managed soliton pulse train propagating in a recirculating fiber-loop experiment. Theoretically predicted dependencies of the amplitude and phase margins for the marks and the amplitude margin for the spaces as a function of distance are in remarkable agreement with the experiments. This model allows us to determine the key physical effects that limit the propagation distance in our experiments.Index Terms-Amplitude margin, amplified spontaneous emission noise, dispersion-managed soliton (DMS), excess gain, filter, phase margin, pulse dynamics, timing jitter.

Optimization of the split-step fourier method in modeling optical-fiber communications systems

“…The simulation time window is 6400 ps and the number of Fourier modes is 6144. We have not included a dispersion slope in this system since there is only a single channel and previous work indicates that higher order dispersion plays no role [12].…”

“…In this section, we study periodically stationary dispersionmanaged soliton (DMS) and chirped-return-to-zero (CRZ) systems that resemble experimental systems [12], [13]. The DMS system is highly nonlinear, meaning that both dispersion and nonlinearity determine the signal evolution, while the CRZ system is quasilinear and the evolution is mostly determined by dispersion [14], [15].…”

“…The DMS system is based on a 107-km dispersion map, which consists of four dispersion-shifted fiber spans, each of 25 km, with normal dispersion equal to 1.10 ps/nm km, followed by 7 km of standard single-mode fiber with anomalous dispersion of 16.6 ps/nm km at 1551 nm [12]. The loss in both fibers is 0.21 dB/km, and the amplifier spacing is 25 km with an additional amplifier after the standard single-mode fiber.…”

Symmetric slope compensation in a long-haul WDM system using the CRZ format

“…1. We determine the evolution by solving the nonlinear Schrödinger equation, modified to take into account spatially varying gain and loss, third-order dispersion, and ASE noise, as described in [8].…”

Experimental demonstration of long-distance dispersion-managed soliton propagation at zero average dispersion

“…We used the rate equation for the erbium-doped fiber amplifiers (EDFA's) [10] to describe the dynamics of the saturated gain in time. Details of the model can be found in [11]. The model allowed us to study evolution of an initial pulse through an initial transient regime into the periodically stationary regime.…”