We analyze the formation of three-dimensional spatiotemporal solitons in waveguides with a parabolic refractive index profile and pure quartic chromatic dispersion. We show, by applying both variational approaches and full three-dimensional numerical simulations, that fourth-order dispersion has a positive impact Read More …
Categoria: News
Robust Three-Dimensional High-Order Solitons and Breathers in Driven Dissipative Systems: A Kerr Cavity Realization
We present a general approach to excite robust dissipative three-dimensional and high-order solitons and breathers in passively driven nonlinear cavities. Our findings are illustrated in the paradigmatic example provided by an optical Kerr cavity with diffraction and anomalous dispersion, with Read More …
Soft glass optical fiber characterization with X-ray computed microtomography
The high loss due to the presence of strong phonon resonances makes silica fibers unfit for applications in the mid-infrared spectral range. This has led to the development of specialty optical fibers, based on novel materials and manufacturing techniques. In Read More …
Statistics of modal condensation in nonlinear multimode fibers
Optical pulses traveling through multimode optical fibers encounter the influence of both linear disturbances and nonlinearity, resulting in a complex and chaotic redistribution of power among different modes. In our research, we explore the phenomenon where multimode fibers reach stable Read More …
Modal phase-locking in multimode nonlinear optical fibers
Spatial beam self-cleaning, a manifestation of the Kerr effect in graded-index multimode fibers, involves a nonlinear transfer of power among modes, which leads to robust bell-shaped output beams. The resulting mode power distribution can be described by statistical mechanics arguments. Read More …
Multimode Optical Fiber Beam-By-Beam Cleanup
We introduce and experimentally demonstrate the concept of all-optical beam switching in graded-index multimode optical fibers. Nonlinear coupling between orthogonally polarized seed and signal beams permits to control the spatial beam quality at the fiber output. Remarkably, we show that Read More …
Dissipative Kerr solitons, breathers, and chimera states in coherently driven passive cavities with parabolic potential
We analyze the stability and dynamics of dissipative Kerr solitons (DKSs) in the presence of a parabolic potential. This potential stabilizes oscillatory and chaotic regimes, favoring the generation of static DKSs. Furthermore, the potential induces the emergence of new dissipative Read More …
X-ray computed µ-tomography for the characterization of optical fibers
In spite of their ubiquitous applications, the characterization of glass fibers by meansof all-optical techniques is still facing some limitations. Recently, X-ray absorption has beenproposed as a method for visualizing the inner structure of both standard and microstructure opticalfibers. Here, Read More …
Fast dispersion tailoring of multimode photonic crystal resonators
We introduce a numerical procedure which permits us to drastically accelerate the design of multimodephotonic crystal resonators. Specifically, we demonstrate that the optical response of an important class of suchnanoscale structures is reproduced accurately by a simple, one-dimensional model within Read More …
Roadmap on multimode photonics
Multimode devices and components have attracted considerable attention in the last years, and different research topics and themes have emerged very recently. The multimodality can be seen as an additional degree of freedom in designing devices, thus allowing for the Read More …