  We report on an extension of the concept of nonlinear self-repolarization
process by means of two different architectures based on dual-Omnipolarizers.
More specifically, we compare the performance in terms of polarization
attraction capabilities provided by two novel arrangements: The first
configuration relies on two cascaded Omnipolarizers, whilst the second
architecture integrates an additional device directly into the feedback loop.
Our study reveals that for a constant power budget, the cascading of two
subsequent Omnipolarizers enables to improve the efficiency of the attraction
process, yielding an output Degree-of-Polarization close to unity, but at the
cost of twofold equipments.
