A5015359304- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Solid State Laser Technologies
- Advanced Fiber Optic Sensors
- Laser-Plasma Interactions and Diagnostics
- Advanced Fluorescence Microscopy Techniques
- Force Microscopy Techniques and Applications
- Semiconductor Lasers and Optical Devices
- Digital Holography and Microscopy
- Laser Design and Applications
- Glass properties and applications
- Photonic and Optical Devices
- Laser-induced spectroscopy and plasma
- Blood Pressure and Hypertension Studies
- Mass Spectrometry Techniques and Applications
- Hormonal Regulation and Hypertension
- Advanced Chemical Physics Studies
- Advanced Photonic Communication Systems
- Cell Image Analysis Techniques
- Photonic Crystals and Applications
- Silicon Carbide Semiconductor Technologies
- Data-Driven Disease Surveillance
- Orbital Angular Momentum in Optics
ELI-HU Research and Development Non-Profit
2015-2023
BM Központi Kórház
2022
Semmelweis University
2022
Active Fiber Systems (Germany)
2019
Institute for Transport Sciences
2007-2017
HUN-REN Wigner Research Centre for Physics
2014
Hungarian Academy of Sciences
2006-2014
Institute for Solid State Physics and Optics
2014
Furukawa Electric (United Kingdom)
2006-2008
Budapest University of Technology and Economics
2001-2006
This review presents the technological infrastructure that will be available at Extreme Light Infrastructure Attosecond Pulse Source (ELI-ALPS) international facility. ELI-ALPS offer to scientific community ultrashort pulses in femtosecond and attosecond domain for time-resolved investigations with unprecedented levels of high quality characteristics. The laser sources beamlines facility make technology accessible scientists lacking access these novel tools. Time-resolved investigation...
Few-cycle lasers are essential for many research areas such as attosecond physics that promise to address fundamental questions in science and technology. Therefore, further advancements connected significant progress the underlying laser Here, two-stage nonlinear compression of a 660 W femtosecond fiber system is utilized achieve unprecedented average power levels energetic ultrashort or even few-cycle pulses. In first step, 408 W, 320 μJ, 30 fs pulses achieved, which can be compressed 216...
The generation of three-cycle multi-millijoule pulses at 318 W power is reported by compressing a Yb-fiber chirped pulse amplifier in 6 m long stretched flexible hollow fiber. This technique brings high-power lasers to the few-cycle regime.
Diffraction-limited fundamental mode amplification is demonstrated in Er-doped fibers with areas ranging from 900 to 1800 mum <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The amplifiers are core-pumped Raman fiber lasers both signal and pump selectively launched into the mode. This scheme results differential gain for stabilizes it against mixing caused by perturbations core. Gains that greater than 30 dB a single stage without...
Two-stage multipass-cell compression of a fiber-chirped-pulse amplifier system to the few-cycle regime is presented. The output delivers sub-2-cycle (5.8 fs), 107 W average power, 1.07 mJ pulses at 100 kHz centered 1030 nm with excellent spatial beam quality (M2 = 1.1, Strehl ratio S 0.98), pointing stability (2.3 µrad), and superior long-term power 0.1% STD over more than 8 hours. This combined carrier-envelope phase 360 mrad in frequency range from 10 Hz 50 kHz, i.e., measured on...
Abstract We generate attosecond pulse train (APT) in argon driven by the high repetition rate (HR) laser of extreme light infrastructure-attosecond source (ELI-ALPS), providing 100 kHz, 80 W, 1030 nm, 40 fs pulses from a fiber chirped-pulse amplification (fiber-CPA) system. Under current operating conditions harmonic generation beamline (HR-GHHG), we observed average duration to be 395 as measured using technique reconstruction beating interference two-photon transitions. The uses an...
Since the first outbreak of COVID-19 epidemic at end 2019, data has been made available on number infections, deaths and recoveries for all countries World, that can be used statistical analysis. The primary interest this paper is how well logistic equation predict outcome in any regions World assuming methodology testing process, namely collection method social behavior not changing over course time. Besides relevance, study two scientific purposes: we investigate if a simple saturation...
The ALPS Facility of ELI ERIC provides few-cycle light pulse sources to the international user community. A key group beamlines utilizes 1 mJ, sub-6 fs, 100 kHz fiber-based laser system, HR1, which supports attosecond high harmonic generation applications and time-resolved spectroscopy experiments. While repetition rate facilitates statistical analysis, it also puts a thermal demand on beam delivery targetry due average power. In this paper, we present system as solution for discrete rates...
The ALPS Facility of ELI ERIC provides few-cycle light pulse sources to the international user community. A key group beamlines utilizes 1 mJ, sub-6 fs, 100 kHz fiber-based laser system, HR1, which supports attosecond high harmonic generation applications and time-resolved spectroscopy experiments. While repetition rate facilitates statistical analysis, it also puts a thermal demand on beam delivery targetry due average power. In this paper, we present system as solution for discrete rates...
We present a carrier-envelope phase (CEP)-stable Yb-doped fiber laser system delivering 100 µJ few-cycle pulses at repetition rate of kHz. The CEP stability the when seeded by offset-locked oscillator is 360 mrad, as measured pulse-to-pulse with stereographic above-threshold ionization (stereo-ATI) meter. Slow fluctuations have been suppressed implementing feedback loop from meter to pulse picking acousto-optic modulator. To best our knowledge, this highest achieved date fiber-based,...
We present a carrier-envelope offset (CEO) stable ytterbium-doped fiber chirped-pulse amplification system employing the technology of coherent beam combining and delivering more than 1 kW average power at pulse repetition rate 80 MHz. The CEO stability is 220 mrad rms, characterized out-of-loop with an f-to-2f interferometer in frequency range 10 Hz to 20 high-power boosts oscillator by five orders magnitude while increasing phase noise only 100 mrad. No evidence deterioration due found....
We propose a two-photon microscope scheme capable of real-time, three-dimensional investigation the electric activity pattern neural networks or signal summation rules individual neurons in 0.6 mm x 0.2 volume sample. The points measurement are chosen according to conventional scanning image, and they addressed by separately adjustable optical fibers. This allows at kilohertz repetition rates as many 100 data points. Submicrometer spatial resolution is maintained during similarly microscopy.
We compare the amplification of various modes in large mode area fibers when pump is coupled into fundamental core versus standard cladding-pump scheme. Our simulations show that pumping LP(01) results differential gain for signal which suppresses higher order and amplified spontaneous emission compared to cladding This effect predicted increase with size may provide a path scale fiber several thousand square micron.
A robust, alignment-free monolithic 2.1 kW single-mode continuous wave fiber laser, operating at 1083 nm is demonstrated. The laser pumped with commercial pigtailed multimode diodes through all-fiber pump-signal power combiners in a MOPA architecture. oscillator was formed high reflector and output coupler Bragg gratings written 11/200 μm (mode field/cladding diameter) fiber. gain medium 19m OFS double clad Yb-doped (DCY). Pump light coupled to the using two (PSC). total of 20 commercially...
We demonstrate high average power, peak power amplification of 10 GHz, picosecond and femtosecond pulses in a very-large-mode-area (VLMA), Er-doped fiber with an effective area ∼1100 μm2. A high-power, single-mode Raman laser up to 183 W at 1480 nm served as the pump source. When amplifying 3 ps 1560 nm, maximum 120 was demonstrated. Using additional highly nonlinear for pulse compression before VLMA amplifier, 130 fs 115 W, 88 kW, M2 1.18 were achieved. To best our knowledge, this is first...
Robust fundamental mode propagation and amplification of picosecond pulses at 1.56 microm wavelength is demonstrated in a core-pumped Er fiber with 1170 microm2 effective area. Record peak power exceeding 120 kW, 67 nJ pulse energy are achieved before the onset breakup. A small increase input results temporal collapse center to 58 fs duration, powers approaching 200 kW.
Picosecond pulses at 1.56 micro mm wavelength are directly amplified with a diffraction limited beam quality in core-pumped Er fiber an 875 m(2) effective area. The interplay between nonlinear spectral broadening and anomalous dispersion compresses the input pulse duration during amplification so that 42 nJ energy approximately 65 kW peak power achieved without break-up.
Numerical simulations on different kinds of realistic photonic bandgap fibers exhibiting reversed dispersion slope for the propagating fundamental mode are reported. We show that or flat functions in a wide wavelength range using hollow-core, air-silica and solid core Bragg with step-index profile can be obtained by introducing resonant structures fiber cladding. evaluate confinement loss profiles these from Helmholtz eigenvalue equation calculated properties used to investigate propagation...
Attosecond Pulse Trains (APT) generated by high-harmonic generation (HHG) of high-intensity near-infrared (IR) laser pulses have proven valuable for studying the electronic dynamics atomic and molecular species. However, high intensities required high-photon-energy, high-flux HHG usually limit class adequate systems to repetition rates below 10~kHz. Here, APT's from 100 kHz, 160 W, 40 fs system (HR1) Extreme Light Infrastructure Source (ELI-ALPS) are reconstructed using Reconstruction...
Insights into the structure of amorphous Si (a-Si) and hydrogenated (a-Si:H) have been made by analysing local configurations found in fragments large molecules. The source for this data is Cambridge Structural Database. Out almost 1800 analysed, a considerable number contain atoms triangular or planar square arrangements. It suggested that presence such a-Si could account first peak experimentally determined radial distribution function.
The relationship between transmission group delay and stored energy in optical fibers is discussed. We show by numerical computations that the of an pulse finite bandwidth transmitted through a piece low loss fiber unit length proportional to standing wave electromagnetic field. energy-group ratio typically approaches unity as confinement converges zero. In case dispersion tailored Bragg fiber, we found decreased while increased compared those standard quarterwave configuration. Furthermore,...
We present a design concept of dielectric gratings containing resonant high (TiO2) and low (SiO2) index thin-film layers between the grating underlying multilayer reflector. use numerical simulations genetic algorithm optimization method to achieve diffraction efficiency (>97%) in first diffracted order over wide wavelength range (∼160 nm) at around 800 nm. The basic structural contains refractive binary with alternating low- high-index reflector layers, thicknesses which are also among...