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We report the experimental observation of polarization domain-walls in conventional optical fibers. Moreover, we exploit their topological properties for data transmission beyond the Kerr limits imposed in normally dispersive fibers.
We demonstrate that the nonlinear interaction in an optical fiber between an incident beam and its backward delayed replica leads to a chaotic dynamics of its output polarization state enabling a powerful scrambling process.
In the early 1950s, Fermi, Pasta and Ulam (FPU) published a seminal report in which they numerically investigated the dynamics of a one-dimensional anharmonic chains of particles [1]. They argued that, owing to the nonlinear coupling, the system would irreversibly relax to a state of thermal equilibrium, in which the energy is equidistributed among all modes. Instead of such a thermalization process,...
Optical domain walls (DW) correspond to a localized structure of the kink type that connects two regions of space with different polarizations [1]. In such a symbiotic system, the fast polarization knots lead to two anticorrelated coupled twin-waves for which the strong binding force imposed by cross-phase modulation (XPM) can compensate for the classical defocusing regime. In this contribution, we...
We experimentally investigate the design of a high-repetition rate source delivering well-separated optical pulses due to the nonlinear compression of a dual-frequency beat signal within a cavity-less normally dispersive fiber-based setup.
We report a novel method for sampling and amplifying a nanoseconds signal based on the combined effects of normal chromatic dispersion and cross-phase modulation induced by high repetition rate sinusoidal and orthogonally polarized pump wave.
We report the generation and propagation of polarization domain walls in a standard Telecom optical fiber in the normal dispersion regime. These vectorial structures are then implemented in order to transmit optical data at 1550 nm at a 10 GBits/s and 40 GBits/s bit-rate.
We describe a phenomenon of self-organization of the light state-of-polarization in optical fibers based on a nonlinear cross-polarization interaction between an incident signal and its backward replica. Several proof-of-principles for telecom applications are reported.
We report the experimental observation of self-polarization of light in optical fibers through a counter-propagating four-wave mixing between an incident signal and its backward replica. An efficient self-polarization of a 40-Gbit/s signal is demonstrated.
We report a polarization scrambler based on the nonlinear interaction in optical fibers between a forward beam and its backward replica amplified by a reflective-loop. The output polarization exhibits a fast chaotic dynamics and was tested on a 10-Gbit/s signal.
We present the first experimental observation of cross-polarization modulation activated modulation instability in the normal dispersion regime of a randomly birefringent telecom optical fiber. The instability is induced by two wavelength-division-multiplexed and orthogonally polarized pumps.
A polarization bistability and hysteresis cycle phenomenon is demonstrated in optical fibers thanks to a counter-propagating four-wave mixing interaction. Based on this process, we successfully report the proof-of-principle of an optical flip-flop memory and a 10-Gbit/s routing operation.
We analyze two all-optical fiber-based fast polarization scramblers. In the first, a signal beam nonlinearly interacts with a co-propagating incoherent pump, whose fast temporal fluctuations induce an effective depolarization of the signal. In the second, the signal interacts with its backward replica generated and amplified by a reflective loop. Beyond an amplification threshold, the signal output...
All-optical control of the state-of-polarization (SOP) of light using nonlinear effects in optical fibers has attracted much research interest in recent years [1-3]. These efforts are motivated by telecom applications requiring high-precision polarization control without adding polarization-dependent losses, as in conventional polarizing devices. Nonlinear polarization pulling has already been demonstrated...
The generation of optical supercontinua in the mid-infrared region and especially their expansion beyond the intrinsic limit dictated by fused silica is currently a subject of high interest. Tellurite and chalcogenide glasses have serious advantages because of their wide transmittance window which can reach more than 10 μm while the Kerr nonlinearity can be 500 times stronger than fused silica. These...
The dynamics of extreme waves, often known as freak or rogue waves (RW), is presently a subject of intensive research [1]. In oceanography, RW are mostly known as a sudden deep-water event which is responsible for ship wreakages and can be modeled by the 1D Nonlinear Schrödinger Equation (NLSE). In this framework, an ideal testbed is provided by optical pulse propagation in nonlinear optical fibers:...
Due to a growing demand of security in transmission systems, recent research have been focus on the ability to manipulate a light beam in such a way to hide, namely to cloak, an event over a finite time or localization in space. The main idea is to create a hole or a gap in the spatial or time domain so as to allow for an object or a data to be kept hidden for a while and then to be restored [1-2]...
The all-optical control of light polarization is nowadays a fundamental issue which finds important applications in optical networks. In this field, the research has moved on the development of nonlinear methods of re-polarization of a partially coherent and initially depolarized light [1]. The main drawback of most of these devices is that they suffer from a large amount of output Relative-Intensity-Noise...
Generation of high-quality optical pulse trains at repetition rate of tens of GHz around 1.5 μm has become increasingly interesting for many scientific applications such as optical sampling or ultrahigh capacity transmission systems. Unfortunately, the current bandwidth limitations of optoelectronic devices do not enable the direct generation of pulses with temporal width below a few ps and actively...
The generation of optical frequency combs has a variety of applications from optical metrology to spectroscopy and wavelength division multiplexing. Nonlinear methods to generate frequency combs are based on multiple four-wave mixing (FWM) in highly nonlinear waveguides [1]. The mechanism for the generation of a wideband comb from a CW pump is Kerr-induced phase-matching of the FWM interaction or...
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