Numerical study of an optical regenerator exploiting self-phase modulation and spectral offset filtering at 40Gbit/s

Abstract

:In this work, we numerically investigate the performances of optical regenerators based on self-phase modulation and spectral offset filtering at 40 Gbit/s. We outline the different effects affecting the device performances and explain the choice of the optimal working power. The impact of the regenerator on the output signal is also analysed through a statistical approach. Both single and double stage configurations are investigated.

Scaling guidelines of a soliton-based power limiter for 2R-optical regeneration applications

“…As it has been shown in previous papers [14,15], the impact of an optical 2R regenerator based on self-phase modulation is not restricted to amplitude jitter reduction, indeed other pulse parameters are affected by the nonlinear propagation followed by spectral filtering. We have carried out a similar analysis as the one reported in [14,15] where several points have been investigated in the context of MR and we compare the two configurations.…”

“…We have carried out a similar analysis as the one reported in [14,15] where several points have been investigated in the context of MR and we compare the two configurations. Note that in a preceding article, Matsumoto made a similar comparison, but in the context of cascaded in-line regenerators combined with a resynchronization function [24].…”

Active Mamyshev regenerator

“…Consequently, dispersion acts on the expanded spectrum over a reduced length, which explains the observed limited temporal broadening. We may also anticipate some beneficial consequences in terms of timing jitter of the regenerated pulse 11,13) : as can be observed in Fig. 3(a), the delay for both configuration is not identical.…”

“…3(a), one can also notice that pulses obtained in active architecture experience lower temporal broadening than the pulses in the passive configuration. This feature is beneficial in order to avoid the deleterious effect of sequence patterning that degrades the performance of MRs due to pulse to pulse interactions in the regenerator 13,21,36) . This reduced output duration can be understood in view of the longitudinal temporal and spectral evolutions of the pulses ( Fig.…”

“…This important building block of future high-speed optical grooming switches 3) can be achieved by using various optical methods taking advantage of the instantaneous Kerr non-linear response of optical fibers : non-linear optical loop mirrors (NOLMs) 4,5) , four-wave mixing 6) , or self-phase modulation (SPM) in normally 7) or anomalous 8,9) dispersive fibers (the two latest methods being known as "Mamyshev" (MR) and "spectrally filtered solitons" respectively). Thanks to its ability to simultaneously improve '0' and '1' bits of signal in a rather simple experimental scheme, MR technique has stimulated a large amount of works, both theoretical [10][11][12][13][14][15][16][17][18][19] and experimental 7,12,16,[19][20][21][22] .…”