All-optical multichannel 2R regeneration in a fiber-based device

Abstract

We propose the design of an all-optical 2R regenerator capable of handling multiple wavelength-division-multiplexed channels simultaneously. It extends the known concept of off-center filtering of self-phase-modulation-broadened signal spectra. The novel feature of the proposed device is a dispersion map that strongly suppresses interchannel impairments. The map employs several sections of nonlinear fiber with high normal dispersion, separated by dispersion compensators with spectrally periodic group delay. The results of our numerical simulations indicate the feasibility of such a multichannel regenerator.

Multi-channel all-optical signal processing based on parametric effects

“…Multi-wavelength nonlinear optical processing has been explored for a number of years as a challenging problem to address (see e.g. [2,3]), impeded mainly by nonlinear crosstalk between the various waves that co-exist simultaneously in the same nonlinear medium. This challenge is easier to address when the power of the signals involved can be kept at low levels, in which case they interact strongly with a much more powerful pump, but not with each other.…”

Active Mamyshev regenerator

“…Recent extensions have also been proposed in order to process several wavelengths 23,24) or polarizations 25) simultaneously, in order to gain some flexibility on the choice of the nonlinear fibers that are used 26) or in order to optimize the incoming pulse shape 27) . Similarly to the nonlinear amplifying loop mirror 28) that is an evolution of a NOLM, another potential improvement that has been suggested to MRs is to combine physical amplification with nonlinear propagation 29) .…”

Broadband fiber Bragg grating with channelized dispersion

“…multiple reflection bands) and channelized dispersion spectrum: although channelized reflection bands can add a filtering function, in some cases their presence also reduces the efficiency of the usage of the spectrum. Moreover, the dispersion may exhibit sharp changes near the band edges which, when combined with the inevitable insertion loss variation, serves to limit the device performance in some applications such as tunable dispersion compensators [7], 2R regeneration (pulse reamplification and reshaping) [11], and collision-induced timing jittering reduction [12]. We present here a new class of multi-channel FBGs, which provides the characteristics of channelized dispersion but does so with only a single reflection band.…”