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Micro-rheology recently emerged as a promising technique for investigating the viscoelastic properties of complex fluids at a molecular scale. The study of the rheological properties of polymer solutions and reversible gels is more complex than that of molecular fluids, because these fluids commonly exhibit nonlinear viscosity behaviour. The research activity that we report about has been dedicated...
Silicon photonics is a well established platform for the development of fully integrated optical devices for optical communication systems. In particular, the strong modal confinement typical of silicon waveguides enables the exploitation of nonlinear effects with much lower optical power levels. Different structures for all-optical signal processing have been reported in the last years, such as all...
We present a careful investigation of the optical properties of Zr-doped lithium-niobate crystals. We also investigate in detail the threshold concentration for Zr-doping, by means of three different optical measurement techniques.
Optical phase-modulated systems are promising candidates for the development of ultrahigh-bit-rate transmission links, thanks to their high spectral efficiency and increased tolerance to fiber-optic nonlinearities. However, their implementation was considerably slowed down by theoretical studies, suggesting that the transmission performance can be severely hindered by nonlinear phase noise (the so-called...
This work demonstrates that the use of the mid-nonlinearity temporal inversion (MNTI) technique could allow the realization of efficient transmission systems at ultra-high bit rates, leading to a significant impact on the design, assessment, and implementation of future transmission links. In particular, this technique could open the way to the low cost upgrade of standard low bit-rate systems to...
We experimentally demonstrate for the first time, simultaneous compensation of nonlinearity and dispersion into an embedded link with strongly asymmetrical power profiles. Two configurations satisfying the mid-nonlinearity-temporal-inversion principle are tested.
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