A5038063372- Advanced Fiber Laser Technologies
- Nonlinear Photonic Systems
- Nonlinear Waves and Solitons
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Photonic Crystal and Fiber Optics
- Photonic and Optical Devices
- Solid State Laser Technologies
- Cardiac Arrest and Resuscitation
- Advanced Fiber Optic Sensors
- Quantum optics and atomic interactions
- Optical Network Technologies
- Ocean Waves and Remote Sensing
- ECG Monitoring and Analysis
- Advanced Mathematical Physics Problems
- Cardiac electrophysiology and arrhythmias
- Microwave Imaging and Scattering Analysis
- Semiconductor Lasers and Optical Devices
- Laser-Plasma Interactions and Diagnostics
- Random lasers and scattering media
- Underwater Acoustics Research
- Laser Design and Applications
- Gyrotron and Vacuum Electronics Research
- Heart Rate Variability and Autonomic Control
- Optical Coatings and Gratings
University of Brescia
2015-2024
Purple Mountain Laboratories
2024
Southeast University
2021-2024
University of Ferrara
2024
Consorzio Nazionale Interuniversitario per le Telecomunicazioni
2022-2023
Brescia University
2002-2022
National Institute of Optics
2003-2019
National Interuniversity Consortium for the Physical Sciences of Matter
2008-2013
Istituto Nazionale per la Fisica della Materia
2002-2006
University of Padua
2002-2004
We construct and discuss a semirational, multiparametric vector solution of coupled nonlinear Schrödinger equations (Manakov system). This family solutions includes known Peregrine solutions, bright- dark-rogue novel unusual freak waves. The rogue waves could be great interest in variety complex systems, from optics fluid dynamics to Bose-Einstein condensates finance.
We report and discuss analytical solutions of the vector nonlinear Schrödinger equation that describe rogue waves in defocusing regime. This family includes bright-dark dark-dark waves. The link between modulational instability (MI) is displayed by showing only a peculiar kind MI, namely baseband can sustain rogue-wave formation. existence regime expected to be crucial progress explaining extreme variety physical scenarios described multicomponent systems, from oceanography optics plasma physics.
The pioneering paper 'Optical rogue waves' by Solli et al (2007 Nature 450 1054) started the new subfield in optics. This work launched a great deal of activity on this novel subject. As result, initial concept has expanded and been enriched ideas. Various approaches have suggested since then. A fresh look at older results discoveries undertaken, stimulated 'optical waves'. Presently, there may not unique view how scientific term should be used developed. There is nothing surprising when...
We introduce a novel family of analytic solutions the three-wave resonant interaction equations for purpose modeling unique events, i.e., ``amplitude peaks'' which are isolated in space and time. The description these is likely to be crucial step understanding forecasting rogue waves variety multicomponent wave dynamics, from oceanography optics plasma physics acoustics.
This review is dedicated to recent progress in the active field of rogue waves, with an emphasis on analytical prediction versatile wave structures scalar, vector, and multidimensional integrable nonlinear systems. We first give a brief outline historical background research, including referring relevant up-to-date experimental results. Then we present in-depth discussion scalar waves within two different frameworks—the infinite Schrödinger (NLS) hierarchy general cubic-quintic NLS equation,...
We study the existence and properties of rogue wave solutions in different nonlinear evolution models that are commonly used optics hydrodynamics. In particular, we consider Fokas-Lenells equation, defocusing vector nolinear Schr\"odinger long-wave-short-wave resonance equation. show all these exist subset parameters where modulation instability is present, if only unstable sideband spectrum also contains cw or zero-frequency perturbations as a limiting case (baseband instability)....
Abstract Photonics enables to develop simple lab experiments that mimic water rogue wave generation phenomena, as well relativistic gravitational effects such event horizons, lensing and Hawking radiation. The basis for analog gravity is light propagation through an effective moving medium obtained via the nonlinear response of material. So far, analogue kinematics was reproduced in scalar optical test models. Multimode spatiotemporal interactions exhibit a rich spectrum excitations, which...
There is considerable fundamental and applicative interest in obtaining non-diffractive non-dispersive spatio-temporal localized wave packets propagating optical cubic nonlinear or Kerr media. Here, we analytically predict the existence of a novel family dark lump solitary solutions (2+1)D Schr\"odinger equation. Dark lumps represent multi-dimensional holes light on continuous background. We derive from hydrodynamic exact soliton shallow water Kadomtsev-Petviashvili model, inheriting their...
Over the past decade, rogue wave debate has stimulated comparison of predictions and observations among different branches physics, particularly between hydrodynamics optics, in situations where analogous dynamical behaviors can be identified, thanks to use common universal models. Although scalar nonlinear Schroedinger equation (NLSE) constantly played a central role for investigations, moving beyond standard NLSE model is relevant needful describing more general classes physical systems...
We derive a nonlinear envelope equation to describe the propagation of broadband optical pulses in second-order materials. The is first order coordinate and valid for arbitrarily wide pulse bandwidth. Our approach goes beyond usual coupled wave description ${\ensuremath{\chi}}^{(2)}$ phenomena provides an accurate modeling evolution ultra-broadband also when separation into different frequency components not possible or profitable.
We show that dispersive shock waves resulting from the nonlinearity overbalancing a weak leading-order dispersion can emit resonant radiation owing to higher-order contributions. analyze such phenomenon for defocusing nonlinear Schroedinger equation, giving criteria calculating radiated frequency based on estimate of velocity, revealing also diversity possible scenarios depending order and magnitude corrections.
The Manakov model is the simplest multicomponent of nonlinear wave theory: It describes elementary stable soliton propagation and multisoliton solutions, it applies to optics, hydrodynamics, Bose-Einstein condensates. also fundamental interest as an asymptotic in context widely used wavelength-division-multiplexed optical fiber transmission systems. However, although its physical relevance was confirmed by experimental observation (vector) solitons a planar waveguide 1996, there have fact...
Within the coupled Fokas-Lenells equations framework, we show explicitly that, in contrast to expected threefold-amplitude magnification, Peregrine solitons can reach a peak amplitude as high 5 times background level. Besides, interaction of two such anomalous generate spikelike rogue wave extremely amplitude, depending on parameters used. We numerically confirm that soliton beyond threefold limit be reproduced from either deterministic initial profile or chaotic field, hence anticipating...
We shed light on the fundamental form of Peregrine soliton as well its frequency chirping property by virtue a pertinent cubic-quintic nonlinear Schr\"odinger equation. An exact generic solution is obtained via simple gauge transformation, which unifies recently-most-studied rogue-wave species. discover that this type soliton, viable for both focusing and defocusing Kerr nonlinearities, could exhibit an extra doubly localized chirp while keeping characteristic intensity features original...
We report the universal emergence of anomalous fundamental Peregrine solitons, which can exhibit an unprecedentedly ultrahigh peak amplitude comparable to any higher-order rogue wave events, in vector derivative nonlinear Schr\"odinger system involving self-steepening effect. present exact explicit rational solutions on either a continuous-wave or periodical-wave background, for broad range parameters. numerically confirm buildup solitons from strong initial harmonic perturbations, despite...
The super rogue wave dynamics in optical fibers are investigated within the framework of a generalized nonlinear Schrödinger equation containing group-velocity dispersion, Kerr and quintic nonlinearity, self-steepening effect. In terms explicit solutions up to third order, we show that, for solution order n, it can be shaped as single state with its peak amplitude 2n+1 times background level, which results from superposition n(n+1)/2 Peregrine solitons. Particularly, demonstrate that these...
We introduce a simple approach for the efficient generation of tunable narrow-bandwidth picosecond pulses synchronized to broadband femtosecond ones.Second harmonic in presence large group velocity mismatch between interacting transfers fraction energy fundamental frequency pulse into narrowband second one.Using periodically poled stoichiometric lithium tantalate crystal coupled an infrared optical parametric amplifier, we generated 200-nJ with spectral width lower than 8.5 cm -1 and...
We show that nonlinear wave packets localized in two dimensions with characteristic rogue profiles can propagate a third dimension significant stability. This unique behavior makes these waves analogous to light bullets, the additional feature they on finite background. Bulletlike rogue-wave singlet and triplet are derived analytically from composite (2+1)D equation. The latter be interpreted as combination of integrable (1+1)D models expressed different dimensions, namely, Hirota equation...
We provide a systematic study of the rogue-wave dynamics in phase-matched weakly dispersive nonlinear media, which arise either from parametric mixing or stimulated backscattering process, both are modeled by three-wave resonant interaction equations. The explicit solutions up to second order presented. These reveal markedly different vector behaviors and scattering processes. In degenerate situation where two interacting optical fields share same group velocity, sum intensities this pair...
We formulate a non-recursive Darboux transformation technique to obtain the general n th-order rational rogue wave solutions coupled Fokas–Lenells system, which is an integrable extension of noted Manakov by considering both double-root and triple-root situations spectral characteristic equation. Based on explicit fundamental second-order solutions, we demonstrate several interesting dynamics, among are coexisting waves anomalous Peregrine solitons. Our generalized include complete...
We investigate the phenomenon of resonant radiation emitted by Peregrine solitons. show that, unlike bright or dark solitons nonlinear Schrödinger equation, process is affected intrinsic local longitudinal variation soliton wavenumber. give a phase-matching condition that allows prediction multiple spectral peaks radiation.
We show that two-color Peregrine solitary waves in quadratic nonlinear media can resonantly radiate dispersive even the absence of higher-order dispersion, owing to a phase-matching mechanism involves weaker second-harmonic component. give very simple criteria for calculating radiated frequencies terms material parameters, finding excellent agreement with numerical simulations.
We analyze the control of propagation speed three wave packets interacting in a medium with quadratic nonlinearity and dispersion. find analytical expressions for mutually trapped pulses common velocity form three-parameter family solutions three-wave resonant interaction. The stability these novel parametric solitons is simply related to value their group velocity.
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> We present a comprehensive framework to study the nonlinear evolution of ultrabroadband optical pulses in quadratic media. employ envelope equation that goes beyond traditional slowly varying approximation and allows treatment all harmonics by means single equation. exploit this model simulate recently observed supercontinuum phenomena such as parametric downconversion generation octave-spanning...
We study the extreme localization of light, evolving upon a non-zero background, in two-color parametric wave interaction nonlinear quadratic media. report existence Peregrine solitary waves, presence significant group-velocity mismatch between waves (or Poynting vector beam walk-off), regime cascading second-harmonic generation. This finding opens novel path for experimental demonstration rogue ultrafast optics.