A5023395718- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Optical Network Technologies
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- High-pressure geophysics and materials
- Advanced Optical Network Technologies
- Mechanical and Optical Resonators
- Semiconductor Lasers and Optical Devices
- Fire dynamics and safety research
- Advanced MEMS and NEMS Technologies
- Force Microscopy Techniques and Applications
- Laser Design and Applications
- Radiative Heat Transfer Studies
- Photonic Crystal and Fiber Optics
- Phase Equilibria and Thermodynamics
- Magnetic confinement fusion research
- Advanced MIMO Systems Optimization
- Power Line Communications and Noise
- Atomic and Molecular Physics
- Nonlinear Dynamics and Pattern Formation
Ericsson (Italy)
2018-2024
Ericsson (Hungary)
2024
Keele University
2016-2020
University of Pisa
2007-2018
École Polytechnique
2011-2013
Centre National de la Recherche Scientifique
2011-2013
Laboratoire pour l'utilisation des lasers intenses
2011-2013
Sorbonne Université
2011-2013
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2011-2013
Laboratoire des Solides Irradiés
2011-2012
The interaction of laser pulses with thin grating targets, having a periodic groove at the irradiated surface, is experimentally investigated. Ultrahigh contrast ($\ensuremath{\sim}{10}^{12}$) allow us to demonstrate an enhanced laser-target coupling for first time in relativistic regime ultrahigh intensity $>{10}^{19}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$. A maximum increase by factor 2.5 cutoff energy protons produced target normal sheath acceleration observed respect plane around...
Ion acceleration from solid targets irradiated by high-intensity pulses is a burgeoning area of research, currently attracting large interest worldwide. The properties laser-driven ion beams (high brightness and laminarity, high-energy cut-off, ultrashort burst duration) are, in several respects, markedly different those 'conventional' accelerator beams. In view these properties, have the potential to be employed number innovative applications scientific, technological medical areas. scope...
Slowly evolving, regularly spaced patterns have been observed in proton projection images of plasma channels drilled by intense (≳10¹⁹ W cm⁻²) short (∼1 ps) laser pulses propagating an ionized gas jet. The nature and geometry the electromagnetic fields generating such inferred simulating laser-plasma interaction following evolution with a two-dimensional particle-in-cell code probe deflections particle tracing. analysis suggests formation rows magnetized soliton remnants, quasistatic...
Abstract The multi-Terawatt laser system, terawatt apparatus for relativistic and nonlinear interdisciplinary science, has been recently installed in the Centre Plasma Physics at Queen's University of Belfast. system will support a wide ranging science program, which include laser-driven particle acceleration, X-ray lasers, high energy density physics experiments. Here we present an overview as well results preliminary investigations on ion acceleration mainly carried out performance tests...
The efficiency of laser overdense plasma coupling via surface wave excitation is investigated. Two-dimensional particle-in-cell simulations are performed over a wide range pulse intensity from 1015 to 1020 W cm−2 μm2 with electron density ranging 25 100nc describe the interaction grating target where condition fulfilled. numerical studies confirm an efficient enhancement absorption up 75%. also show presence localized, quasi-static magnetic field at surface. Two regimes identified for low...
The prediction of thermoacoustic instabilities is fundamental for combustion systems such as domestic burners and industrial gas turbine engines. High-amplitude pressure oscillations cause thermal mechanical stress to the equipment, leading premature wear or even critical damage. In this paper we present a new approach produce nonlinear (i.e. amplitude-dependent) stability maps system function various parameters. Our based on tailored Green’s system, which calculate analytically. To end,...
The possibility of enhancing the emission ions accelerated in interaction a high intensity ultra-short (<100 fs) laser pulse with thin target (<10λ0), via surface plasma wave excitation is investigated. Two-dimensional particle-in-cell simulations are performed for intensities ranging from 1019 to 1020 Wcm−2μm2. resonantly excited by coupling modulation at surface. In cases where excited, we find an enhancement maximum ion energy factor ∼2 compared flat.
The advent of 6G is expected to transform connectivity by necessitating robust and scalable transport networks, capable managing the escalating demands for enhanced bandwidth, negligible latency, heightened network automation. progression towards centralized radio access networks cloudification functions introduce additional requirements network. Addressing these demands, integration packet optical systems combines flexibility with high bandwidth low latency systems, aiming a balance between...
In the present work, we formulate a new method to represent given Flame Describing Function by analytical expressions. The underlying idea is motivated observation that different types of perturbations in burner travel with speeds and arrival perturbation at flame spread out over time. We develop an model for Function, which consists superposition several Gaussians, each characterised three amplitude-dependent quantities: central time-lag, peak value standard deviation. These quantities are...
The possibility of inducing a magnetic field via surface plasma-wave excitation is investigated with simple nonrelativistic hydrodynamic model. A static predicted at the plasma surface, scaling square surface-wave amplitude, and influence electron density studied. In case resonant by laser this result can be applied to low intensities such that quiver velocity in wave less than its thermal velocity.
Reconfigurable radiofrequency (RF) signal generation in the 30–300 GHz range is attractive for many applications. W-band (75–110 GHz) currently targeted by both wireless and satellite communications similar frequency ranges are employed on-board automotive radar systems. Distribution of high-precision high-frequency synchronization signals modern centralized radio access networks might be addressed radio-over-fiber solutions, but stringent phase noise (PN) requirements case broadband with...
A packaged silicon photonics radio-frequency (RF) synthesizer operating in the millimeter (mm-) wave band suitable for clock signal distribution b5G/6G radio access networks is realized and experimentally characterized. The assembly include a photonic integrated circuit (PIC) acting as frequency multiplier local oscillator (LO) reference at microwave frequencies printed board (PCB) hosting custom bias tee designed to provide wideband matching condition over more than 6 GHz around 20 input LO...
The propagation of a superintense laser pulse in an underdense, inhomogeneous plasma has been studied numerically by two-dimensional particle-in-cell simulations on time scale extending up to several picoseconds.The effects the ion dynamics following charge-displacement self-channeling have addressed.Radial acceleration leads 'breaking' channel walls, causing inversion radial space-charge field and filamentation pulse.At later times number long-lived, quasiperiodic structures are observed...
The evolution beyond 5G towards 6G will accelerate the transformations begun by to deploy new approaches define delivery services. network should be accessible anywhere, always-on and with guarantee performances. This poses challenges transport that assure available connectivity among functions at different levels of granularity. so flexible on-demand processing automatically required and, same time, extreme performance. Optical Dense Wavelength Division Multiplexing technology are relevant...
The use of optical transceivers in antenna array system applications requires reliable operation at high temperature. experimental characterisation a silicon photonics transceiver operating harsh environment with temperatures up to 120°C is presented and discussed. was placed inside climatic chamber it fed by an external depolarised light source. bit error rate measured, the impacts on transmission performances were analysed discussed, including reliability aspects. authors believe that...
We report the development of a fully non-blocking optical switch fabric, enabling deterministic and dynamic network infrastructure. Focus is on scalable photonic integration packaging technologies required to develop low-cost including micro-transfer-printing amplifiers, FOWLP for dense photonic-electronic integration, optical/thermal solutions IC-substrates.
Co-packaged optics (CPO) is an emerging technology providing optical interconnections with a bandwidth density of the order Terabit/s per square millimeter. All current development and standardization efforts focus on data centers, to connect very high-capacity switches while improving energy efficiency footprint compared designs based front-panel pluggable optics. We think CPO will have important role also in 6G networks, meet demand for high capacity at low consumption. This paper...
Using an on-chip optical frequency comb source and advanced filters, flexible generation of stable RF carriers in the millimeter-wave band is realized silicon on insulator technology. Preliminary characterization demonstrates up to tenfold multiplication a reference local oscillator signal at 20 GHz.
In this paper, we will present a fast prediction tool based on one-dimensional Green's function approach that can be used to bypass numerically expensive computational fluid dynamics simulations. The Green’s has the advantage of providing clear picture physics behind generation and evolution combustion instabilities. addition, method allows us perform modal analysis; single acoustic modes treated in isolation or combination with other modes. article, investigate role higher-order determining...
This paper focusses on the relationship between heat release rate and acoustic field, which is a crucial element in modelling thermoacoustic instabilities. The aim of twofold. first to develop transformation tool, makes it easy switch time-domain representation (typically law involving time-lags) frequency-domain flame transfer function) this relationship. Both representations are characterised by same set parameters n 1 , 2 …, k . Their number quite small, they have clear physical meaning:...
Future generations of mobile communications promise near unlimited access to information and data sharing with ubiquitous wireless connectivity for any kind device application that may benefit from being connected. This poses new design challenges requires a renewal the hardware platforms meet increased demand capacity reliability network. Next generation Radio Access Network (RAN) will evolve towards an increase radio bandwidth, carrier frequency extended millimeter waves (mmW) range. Other...
we discuss the challenges of future radio access networks in meeting growth traffic without a parallel explosion energy consumption. The opportunities offered by integrated photonics technologies are analyzed.
We report the first O-band coherent transmission using a comb laser and silicon photonics modulator. achieved greater than 8.5 Tbps 19 lines over 10km at 56 Gbaud DP-32QAM.