Scaling Guidelines of a Soliton-Based Power Limiter for 2R-Optical Regeneration Applications

Abstract

In this work, we report scaling rules for the design of an all-fibered soliton-based power limiter for reamplification and reshaping (2R) regeneration process. In particular, we propose general guidelines to fix the optimum fiber length and initial power of the regenerator. We quantitatively point out the optical power limiting effect of the device enabling a significant reduction of the amplitude jitter of a degraded signal. Influence of the initial level of amplitude jitter is discussed and the results are compared with a self-phase modulation-based configuration working in the normal dispersion regime. Realistic numerical simulations in the context of 160 Gbit/s signals confirm that an efficient improvement of the signal quality can be achieved by means of such a device.

Measurement of Residual Chromatic Dispersion or OSNR via Nonlinear Spectral Evolution

“…Based on a central filtering and anomalous dispersion regime, our setup has the advantage of requiring moderate input powers compared to other solutions. Moreover, the use of an anomalous segment of HNLF limits the detrimental pulse-to-pulse interactions [10]. Finally, the use of a fiber element could also be replaced in a near future by the implementation of highly nonlinear waveguides that would allow further photonic integration [15], the constant progress in dispersion management in this waveguide enabling to obtain anomalous dispersion.…”

“…A key parameter of our device is the shape of its transfer function (TF) that non-linearly maps the input average power to the average power obtained after this filtering. Indeed, according to the choice of fiber parameters, three behaviors can be expected : a monotonously increasing TF, a curve exhibiting a marked plateau or a raise and fall evolution [10]. Contrary to the applications usually targeting an all-optical ultrafast power-limiter [11,12], we voluntarily implement here a strong rise and fall evolution that enables an enhanced sensitivity towards the initial pulse stream fluctuations.…”

Impact of amplitude jitter and signal-to-noise ratio on the nonlinear spectral compression in optical fibres

“…We can see that the TF features a rise and fall evolution and has a local maximum at Pin = 2 W. This evidences that operation of the device near the peak of its TF should be beneficial to both the probability distributions of logical ones and zeros of a return-to-zero (RZ) signal in that the mark-to-space extinction ratio should be improved and the amplitude fluctuations in the one-bit pulses should be squeezed. It is noteworthy however a TF exhibiting a large plateau with an inflexion point would be preferable from a power equalization standpoint [28,29]. The shape of the TF also explains the amplification of the fluctuations in the central lobe of the pulse spectrum that are observed after propagation over the distance zF in the fibre (Fig.…”

Active Mamyshev regenerator

“…As shown in 11) , such a regime can be obtained when precise relationships between the input pulse, filter offset and normally dispersive fiber parameters are satisfied. In the context of this article, we do not intend to obtain such an optimum power equalization, therefore a non-monotonous TF (referred as A-type in 11,35) ) can be acceptable. Our main focus will be the input and output powers involved when working at the operating power.…”