A5050304856- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Atomic and Molecular Physics
- Laser-induced spectroscopy and plasma
- Advanced X-ray Imaging Techniques
- Laser Design and Applications
- Advanced Fiber Laser Technologies
- Ionosphere and magnetosphere dynamics
- Magnetic confinement fusion research
- Solid State Laser Technologies
- Particle Accelerators and Free-Electron Lasers
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Plasma Applications and Diagnostics
- Particle accelerators and beam dynamics
- Electrohydrodynamics and Fluid Dynamics
- Plasma Diagnostics and Applications
- Spectroscopy and Quantum Chemical Studies
- Robot Manipulation and Learning
- Astro and Planetary Science
- Soft Robotics and Applications
- Electromagnetic Simulation and Numerical Methods
- Orbital Angular Momentum in Optics
- Teleoperation and Haptic Systems
- Marine Bivalve and Aquaculture Studies
Universidad Politécnica de Madrid
2015-2024
Comunidad de Madrid
2023
Centre National de la Recherche Scientifique
2009-2022
Laboratoire d'Optique Appliquée
2008-2022
École Polytechnique
2010-2022
École Nationale Supérieure de Techniques Avancées
2008-2022
Czech Academy of Sciences, Institute of Plasma Physics
2020
Fusion (United States)
2009-2018
Fusion Academy
2009-2018
Polytec (Germany)
2018
Recently, S. Mitryukovskiy et al. presented experimental evidence showing that backward Amplified Spontaneous Emission (ASE) at 337 nm can be obtained from plasma filaments in nitrogen gas pumped by circularly polarized 800 femtosecond pulses (Opt. Express, 22, 12750 (2014)). Here, we report a seed pulse injected the direction amplified ~200 times inside this amplifier. The radiation either linearly or polarized, dictated seeding pulse, which is distinct non-polarized nature of ASE. We...
We report the first experimental demonstration of a laser-driven circularly polarized soft-x-ray laser chain. It has been achieved by seeding 32.8 nm Kr ix plasma amplifier with high-order harmonic beam, which using four-reflector polarizer. Our measurements testify that amplified radiation maintains initial polarization seed pulse in good agreement our Maxwell-Bloch modeling. The resulting fully circular beam exhibits Gaussian profile and yields about 1010 photons per shot, fulfilling...
We investigate the dynamics of cavity-free lasing from neutral nitrogen molecules in femtosecond laser filaments. An important difference intensity and temporal duration is observed between backward forward lasing, both amplified spontaneous emission seed-amplification regimes. Numerical simulations based on a nonadiabatic Maxwell-Bloch model reproduce well observations, attribute these differences to finite gain lifetime traveling excitation nature this gas laser.
The amplification of high-order harmonics (HOH) in a plasma-based amplifier is multiscale, temporal phenomenon that couples plasma hydrodynamics, atomic processes, and HOH electromagnetic fields. We use one-dimensional, time-dependent Maxwell-Bloch code to compare the natural regime another where polarization constantly forced by HOH. In this regime, 10-MW (i.e., 100 times higher than current seeded soft x-ray laser power), 1.5-$\ensuremath{\mu}$J, 140-fs pulse free from parasitic structures...
Nitrogen molecules are promoted to excited neutral states during femtosecond laser pulse filamentary propagation in atmosphere, leading a characteristic UV fluorescence. Using laser-induced fluorescence depletion technique, we measure the formation dynamics of these nitrogen with time resolution. We find that formed an unexpected ultrafast timescale $\ensuremath{\sim}4\text{ }\text{ }\mathrm{ps}$ at 1 bar and $\ensuremath{\sim}120\text{ 30 mbar pressure. From this observation deduce...
We demonstrate a method of using Fourier holographic technique to utilize attosecond soft x-ray pulses image nanometer-scale objects. A discrete frequency comb laser-generated high-order harmonics, yielding train pulses, has been used record spatially and spectrally resolved images. The individual wavelengths were also combined form single image, albeit with lower spatial resolution, demonstrating the applicability isolated continuous bandwidths.
Abstract Understanding the behaviour of matter under conditions extreme temperature, pressure, density and electromagnetic fields has profound effects on our understanding cosmologic objects formation universe. Lacking direct access to such objects, interpretation observed data mainly relies theoretical models. However, models, which need encompass nuclear physics, atomic physics plasma over a huge dynamic range in dimensions energy time, can only provide reliable information if we benchmark...
Plasma-based seeded soft x-ray lasers have the potential to generate a high-energy, highly coherent, short pulse beam. Owing their high density, plasmas created by interaction of an intense laser with solid target should store highest amount energy among all plasma amplifiers. However, date output from amplifiers remains as low 60 nJ. We demonstrated that careful tailoring shape is crucial for extracting stored in plasma. With 1-mm-wide plasma, 20 microJ sub-ps pulses achievable. such...
Plasma-based seeded soft-x-ray lasers have the potential to generate high energy and highly coherent short pulse beams. Due their density, plasmas created by interaction of an intense laser with a solid target should store highest amount density among all plasma amplifiers. Our previous numerical work two-dimensional (2D) adaptive mesh refinement hydrodynamic code demonstrated that careful tailoring shapes leads dramatic enhancement both output pumping efficiency. Benchmarking our 2D in...
We present three-dimensional modeling of amplification a high-order harmonic seed by soft x-ray laser plasma. The time-dependent evolution the signal is determined from fully dynamic Maxwell-Bloch calculation. At high intensities, simplified one-dimensional calculation leads to strong Rabi-like temporal oscillations output signal. However, such have not been observed experimentally. Our calculations demonstrate that this due spatial non-uniformities in plasma gain cause Rabi dampen...
High-density, collisionally pumped plasma-based soft-x-ray lasers have recently delivered hundreds of femtosecond pulses, breaking the longstanding barrier one picosecond. To pump these amplifiers an intense infrared pulse must propagate focused throughout all length amplifier, which spans several Rayleigh lengths. However, strong nonlinear effects hinder propagation laser beam. The use a plasma waveguide allows us to overcome drawbacks provided hydrodynamic processes that dominate creation...
This work proposes control structures that efficiently combine force with vision servo of robot manipulators. Impedance controllers are considered which based both on visual servoing and physical or fictitious feedback, the information being combined in image space. Force included extended hybrid also considered. The combination allows tasks range to be partially structured environments. proposed controllers, implemented an industrial SCARA-type robot, tested involving virtual contact environment.
Simulations show that intense plasma-amplified pulses of 100 fs duration and below are feasible by seeding specifically tailored plasma with an ultrashort pulse high harmonic radiation. Seeding overcomes gain narrowing driving amplifying media into saturation earlier, compensates for reduced resulting from boosting the lasing transition linewidth. We conclude ultrahigh intensities (above ${10}^{16}$ W cm${}^{\ensuremath{-}2}$) could be reached.
Experimental results of a two-stage Ni-like Ag soft X-ray laser operated in seed-amplifier configuration are presented. Both targets were pumped applying the double-pulse grazing incidence technique with intrinsic travelling wave excitation. The injection seed into amplifier target was realized by spherical mirror. show amplification and allow for direct measurement gain lifetime. experimental is suitable providing valuable input computational simulations.
We report on a theoretical study of cavity-free lasing neutral nitrogen molecules in femtosecond laser filaments with nonadiabatic Maxwell-Bloch model, compared recent pump-seed experiments. The nonadiabaticity the process is revealed and it found that electron-neutral collisions dominate dipole dephasing rate. Moreover, we show asymmetry between forward backward not only depends different amplification lengths but also temporal dynamics collisions. comparison model simulations based...
The evolution of supernova remnants (SNRs) represents a useful and natural laboratory for gasdynamics studies. In this paper the results several hydrodynamical simulations propagation early phases interaction two SNRs embedded in homogeneous interstellar environment are shown. particular, hydrodynamic collision twin during their self-similar stage has been simulated using two-dimensional Lagrangian hydrocode. addition, detailed simulation that attempts to set adequate conditions reproduce...
To date, plasma-based soft x-ray lasers have demonstrated experimentally 1 μJ, ps (1 MW) pulses. This Letter reports extensive study using time-dependant Maxwell-Bloch code of seeding millimeter scale plasmas that store more than 100 mJ in population inversion. Direct these has to overcome very strong amplified spontaneous emission (ASE) as well prevent wake-field amplification. Below nJ injected energy, seed produces pulses with picosecond duration. this limitation, a new scheme been...
Increasing the electron density of collisionally pumped plasma-based soft-x-ray lasers offers promising opportunities to deliver ultrashort pulses. However, strong nonlinear effects, such as overionization-induced refraction and self-focusing, hinder propagation laser beam thus generation elongated volume lasing ions be pumped. Using a particle-in-cell code ray-tracing model we demonstrate that optically preformed waveguides allow for addressing those issues through self-regulation regime...
The wavefront of an injection-seeded soft x-ray laser beam generated by amplification high-harmonic pulses in a λ=18.9 nm molybdenum plasma amplifier was measured Hartmann sensor with accuracy λ/32 root mean square (rms). A significant improvement aberrations 0.51±0.03λ rms to 0.23±0.01λ observed as function column length. variation characteristic time delay between the injection seed and peak pump studied. measurements were used reconstruct source confirm its high brightness.
The amplification of UV radiation and high order harmonics (HOH) in plasmas is a subject raising interest due to its different potential applications several fields like environment security (detection at distance), biology, materials science industry (3D imaging) atomic plasma physics (pump-probe experiments). In develop these sources, it necessary properly understand the process. Being an inhomogeneous medium which changes with time, desirable have full time-dependent 3D description...