A5051803490- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Laser Design and Applications
- Advanced X-ray Imaging Techniques
- High-pressure geophysics and materials
- Laser Material Processing Techniques
- Solid State Laser Technologies
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Atomic and Molecular Physics
- Ophthalmology and Visual Impairment Studies
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Orbital Angular Momentum in Optics
- Corneal surgery and disorders
- Particle Accelerators and Free-Electron Lasers
- Advanced optical system design
- Advancements in Photolithography Techniques
- Optical measurement and interference techniques
- Intraocular Surgery and Lenses
- Nuclear Physics and Applications
- Ocular and Laser Science Research
- Surface Roughness and Optical Measurements
- Geophysics and Sensor Technology
Extreme Light Infrastructure Beamlines
2019-2025
Czech Academy of Sciences, Institute of Physics
2015-2023
Czech Academy of Sciences
2020-2023
Czech Academy of Sciences, Institute of Plasma Physics
2021
Institute for Basic Science
2013-2016
Korea Photonics Technology Institute
2007-2016
Gwangju Institute of Science and Technology
2007-2016
Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy
2016
Handong Global University
2016
Max Planck Institute of Quantum Optics
2016
Laser-wakefield acceleration offers the promise of a compact electron accelerator for generating multi-GeV beam using huge field gradient induced by an intense laser pulse, compared to conventional rf accelerators. However, energy and quality from laser-wakefield have been limited power driving pulses interaction properties in target medium. Recent progress technology has resulted realization petawatt (PW) femtosecond laser, which new capabilities research on acceleration. Here, we present...
High-contrast, 30 fs, 1.5 PW laser pulses are generated from a chirped-pulse amplification (CPA) Ti:sapphire system at 0.1 Hz repetition rate. The maximum output energy of 60.2 J is obtained, pump 120 J, booster amplifier that pumped by four frenquency-doubled Nd:glass systems. During amplification, parasitic lasing suppressed index matching fluid with absorption dye and the careful manipulation time delay between seed pulses. An amplified pulse passes through compressor consisting...
The radiation pressure acceleration (RPA) of charged particles has been a challenging task in laser-driven proton/ion due to its stringent requirements laser and target conditions. realization radiation-pressure-driven proton requires irradiating ultrathin targets with an ultrahigh contrast ultraintense pulses. We report the generation 93-MeV beams achieved by applying 800-nm 30-fs circularly polarized pulses intensity 6.1×1020 W/cm2 15-nm-thick polymer targets. was confirmed from obtained...
Nanostructured thin plastic foils have been used to enhance the mechanism of laser-driven proton beam acceleration. In particular, presence a monolayer polystyrene nanospheres on target front side has drastically enhanced absorption incident 100 TW laser beam, leading consequent increase in maximum energy and charge. The cutoff increased by about 60% for optimal spheres' diameter 535 nm comparison planar foil. total number protons with energies higher than 1 MeV was approximately 5 times. To...
We report on the generation of 1.0PW, 30fs laser pulses at a 0.1Hz repetition rate from chirped-pulse amplification Ti:sapphire system. The energy is amplified up to 47J in final three-pass booster amplifier having 96J pump energy. To best our knowledge, this first petawatt system rate. shot-to-shot fluctuation as low 0.53% rms value, and have homogeneous flattop spatial beam profiles.
Particle acceleration using ultraintense, ultrashort laser pulses is one of the most attractive topics in relativistic laser-plasma research. We report proton and/or ion intensity range $5\ifmmode\times\else\texttimes\fi{}{10}^{19}$ to $3.3\ifmmode\times\else\texttimes\fi{}{10}^{20}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$ by irradiating linearly polarized, 30-fs on 10-to 100-nm-thick polymer targets. The energy scaling with respect and target thickness examined, a maximum 45 MeV...
The interaction of an ultra-intense laser with matter is efficient source high-energy particles, efforts directed toward narrowing the divergence and simultaneously increasing brightness. In this paper we report on emission highly collimated, ultrabright, attosecond γ-photons generation dense electron-positron pairs via a tunable particle scheme, which utilizes two high-power lasers thin wire target. Irradiating target radially polarized pulse first produces series high charge, short...
High-power laser facilities give experimental access to fundamental strong-field quantum electrodynamics processes. A key effect be explored is the nonlinear Breit-Wheeler process: conversion of high-energy photons into electron-positron pairs through interaction with a strong electromagnetic field. major challenge observing pair production experimentally first having suitable source photons. In this paper we outline simple all-optical setup which efficiently generates so-called...
Higher-order aberration correction in abnormal eyes can result significant vision improvement, especially with corneas. Customized optics such as phase plates and customized contact lenses are one of the most practical, nonsurgical ways to correct these ocular higher-order aberrations. We demonstrate feasibility correcting aberrations improving visual performance soft keratoconic while compensating for static decentration rotation lens. A reduction by a factor 3 on average was obtained eyes....
Abstract The high‐power femtosecond laser has now become an excellent scientific tool for the study of not only relativistic laser–matter interactions but also applications. depends on Kerr‐lens modelocking (KLM) and chirped‐pulse amplification (CPA) technique. An all‐Ti:sapphire‐based 30‐fs PW CPA laser, which is called PULSER (Petawatt Ultrashort Laser System Extreme Science Research) been recently constructed being used accelerating charged particles (electrons protons) generating...
A high-energy, high-yield proton beam with a good homogeneous profile has been generated from nanosphere target irradiated by short (30-fs), intense ($7\ifmmode\times\else\texttimes\fi{}{10}^{20}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$) laser pulse. maximum energy of 30 MeV observed high number $7\ifmmode\times\else\texttimes\fi{}{10}^{10}$ in the range 5--30 MeV. spatial uniformity (standard deviation an average value within 85% area) 15% is dielectric target. Particle-in-cell...
Abstract The design and the early commissioning of ELI-Beamlines laser facility’s 30 J, fs, 10 Hz HAPLS (High-repetition-rate Advanced Petawatt Laser System) beam transport (BT) system to P3 target chamber are described in detail. It is world’s first with 54 m length, longest distance high average power petawatt (PW) BT ever built. connects pulse compressor via injector periscope 4.5 diameter plasma physics group hall E3. largest facility was connected system. major engineering challenges...
Abstract Tight focusing with very small f -numbers is necessary to achieve the highest at-focus irradiances. However, tight imposes strong demands on precise target positioning in-focus on-target irradiance. We describe several near-infrared, visible, ultraviolet and soft hard X-ray diagnostics employed in a ∼10 22 W/cm 2 laser–plasma experiment. used nearly 10 J total energy femtosecond laser pulses focused into an approximately 1.3-μm focal spot 5–20 μm thick stainless-steel targets....
Abstract The interaction of a high-power laser with solid target provides ways to produce beams γ-photons. For normal incidence the on usually appear in form two lobes symmetric propagation axis. In this work we demonstrate via three-dimensional particle-in-cell simulations regime where for oblique angles emission collimated γ-photon beam is direction parallel surface. process ascribed generation an interference pattern electromagnetic field formed by incident and reflected pulse....
The laser pulse reflected and focused by the relativistically moving curved plasma mirror can exceed intensity obtained focusing high-power pulses with conventional physical optics. In ultrarelativistic limit where Lorentz $\ensuremath{\gamma}$ factor is large ($\ensuremath{\gamma}\ensuremath{\gg}1$), general field configuration relativistic calculated using $4\ensuremath{\pi}$-spherical scheme in boosted frame of reference. strength distribution be applied to investigate nonlinear quantum...
The focusing property of a focal spot femtosecond laser pulse is presented under tight conditions (below f-number 1). spatial and temporal intensity distributions focused electric field are calculated by vector diffraction integrals coherent superposition method. validity the calculation method examined comparing distribution obtained high condition to that with fast Fourier transform assumes scalar paraxial approximation. modifications described for pulse. results show peak about 2.5x10(24)...
Abstract The relativistic flying parabolic mirror can provide a higher laser intensity than the current system reach via optical-focusing scheme. A weakly (1.8 $$\times$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>×</mml:mo> </mml:math> 10 $$^{17}$$ <mml:msup> <mml:mrow/> <mml:mn>17</mml:mn> </mml:msup> W/cm $$^2$$ <mml:mn>2</mml:mn> , $$\eta = 0.29$$ <mml:mrow> <mml:mi>η</mml:mi> <mml:mo>=</mml:mo> <mml:mn>0.29</mml:mn> </mml:mrow> ) be intensified up to super-strong...
Lower- and higher-order wave-front aberrations of soft contact lenses were accurately measured with a Shack–Hartmann sensor. The placed in wet cell filled lens solution to prevent surface deformation desiccation during measurements. Aberration measurements conventional toric multifocal customized have proved that this method is reliable. A sensor can be used assess optical quality both assist enhancing control.
High-flux energetic protons whose maximum energies are up to 4MeV generated by an intense femtosecond titanium:sapphire laser pulse interacting with 7.5, 12.5, and 25μm thick polyimide tape targets. Laser energy of 1.7J a duration 34fs is focused f/3.4 parabolic mirror giving intensity 3×1019Wcm−2. The main amplified spontaneous emission (ASE) contrast ratio 2.5×107. conversion efficiency from the into proton kinetic achieved be ∼3%, which comparable or even higher than those in previous...
A variant of a grazing-incidence pumping (GRIP) scheme for Ni-like x-ray lasers using single shaped pulse from 10-Hz Ti:sapphire laser system has been demonstrated. Experimental and numerical results show that efficient excitation leading to the lasing process can be achieved by controlled shaping pump pulse. Such defined silver slab target. gain coefficient as high $76\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ was estimated. Results indicate nanosecond amplified spontaneous...
Using three different laser systems, we demonstrate a convenient and simple plasma based diagnostic of the contrast high-power short-pulse lasers. The technique is on measuring specular reflectivity from solid target. remains high even at relativistic intensities above 1019 W/cm2 in case high-contrast prepulse-free laser. On contrary, drops with increasing systems insufficient due to beam breakup increased absorption caused by preplasma.
One of the remarkable phenomena in laser-matter interaction is extremely efficient energy transfer to [Formula: see text]-photons, that appears as a collimated text]-ray beam. For interactions realistic laser pulses with matter, existence an amplified spontaneous emission pedestal plays crucial role, since it hits target prior main pulse arrival, leading cloud preplasma and drilling narrow channel inside target. These effects significantly alter process text]-photon generation. Here, we...