@article{MTMT:34836411,
	title = {Systematic comparison of commercial devices for temporal characterization of few-cycle laser pulses in the 500-1000 nm spectral range},
	url = {https://m2.mtmt.hu/api/publication/34836411},
	author = {Pajer, Viktor and Bohus, János and Malakzadeh Fard Khangheshlaghi, Abdollah and Lehotai, Levente and Kalashnikov, Mikhail and Seres, Imre and Gilicze, Barnabás and Kiss, Bálint and Börzsönyi, Ádám and Varjú, Katalin and Szabó, Gábor and Nagymihály, Roland Sándor},
	doi = {10.1364/OE.509583},
	journal-iso = {OPT EXPRESS},
	journal = {OPTICS EXPRESS},
	volume = {32},
	unique-id = {34836411},
	issn = {1094-4087},
	abstract = {We compare multiple temporal pulse characterization techniques in three different pulse duration regimes from 15 fs to sub-5 fs, as there are no available standards yet for measuring such ultrashort pulses. To accomplish this, a versatile post-compression platform was developed, where the 100 fs near infrared pulses were post-compressed to the sub-two-cycle regime in a hybrid, three-stage configuration. After each stage, the duration of the compressed pulse was measured with the d-scan, TIPTOE and SRSI techniques and the retrieved temporal intensity profiles, spectrum and spectral phases were compared. Spectral homogeneity was also measured with an imaging spectrometer to understand the input coupling conditions of the temporal measurements. Our findings suggest that the different devices give similar results in terms of temporal intensity profile, however they are extremely sensitive to alignment and to beam quality, especially in the case of the shortest pulses. We address specific steps of measurement procedures, which paves the way towards the standardization of pulse characterization in the near future.},
	year = {2024},
	pages = {15710-15722},
	orcid-numbers = {Pajer, Viktor/0000-0003-2770-510X; Bohus, János/0000-0003-1749-4142; Malakzadeh Fard Khangheshlaghi, Abdollah/0000-0003-4864-2697; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@article{MTMT:34489471,
	title = {The petawatt laser of ELI ALPS: reaching the 700 TW level at 10 Hz repetition rate},
	url = {https://m2.mtmt.hu/api/publication/34489471},
	author = {Nagymihály, Roland Sándor and Falcoz, Franck and Bussiere, Benoit and Bohus, János and Pajer, Viktor and Lehotai, Levente and Ravet-Senkans, Muriel and Roy, Olivier and Calvez, Steven and Mollica, Florian and Branly, Stephane and Paul, Pierre-Mary and Börzsönyi, Ádám and Varjú, Katalin and Szabó, Gábor and Kalashnikov, Mikhail},
	doi = {10.1364/OE.509615},
	journal-iso = {OPT EXPRESS},
	journal = {OPTICS EXPRESS},
	volume = {31},
	unique-id = {34489471},
	issn = {1094-4087},
	abstract = {Performance of the novel high repetition rate HF-PW laser system of ELI ALPS is presented in its first operation phase at 400 TW and 700 TW levels. Long-term operation was tested at 2.5 and 10 Hz repetition rates, where an exceptional 0.66% and 1.08% shot-to-shot energy stability was demonstrated, respectively. Thorough spatio-spectral and temporal measurements confirmed high quality output pulses with a Strehl ratio of >0.9 after compression at both repetition rates. Amplified pulses with an unprecedentedly high 240 W average power were reached for the first time from a PW-class amplifier chain by using novel pseudo-active mirror disk amplification-based pump lasers.},
	year = {2023},
	pages = {44160-44176},
	orcid-numbers = {Bohus, János/0000-0003-1749-4142; Pajer, Viktor/0000-0003-2770-510X; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@{MTMT:34413317,
	title = {Status of the ELI-ALPS High Repetition Rate (HR) Laser Systems},
	url = {https://m2.mtmt.hu/api/publication/34413317},
	author = {Jójárt, Péter and Seres, Imre and Bengery, Zsolt Gábor and Gilicze, Barnabás and Várallyay, Zoltán Krisztián and Börzsönyi, Ádám and Shestaev, Evgeny and Walther, Nico and Tschernajew, Maxim and Grebing, Christian and Breitkopf, Sven and Eidam, Tino and Limpert, Jens},
	booktitle = {2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)},
	doi = {10.1109/CLEO/Europe-EQEC57999.2023.10231605},
	unique-id = {34413317},
	year = {2023},
	orcid-numbers = {Jójárt, Péter/0000-0002-5161-2723; Várallyay, Zoltán Krisztián/0000-0002-8675-2005}
}

@{MTMT:34413308,
	title = {First Operation Phase of the 10 Hz 2 PW Laser of ELI ALPS},
	url = {https://m2.mtmt.hu/api/publication/34413308},
	author = {Nagymihály, Roland Sándor and Bohus, János and Pajer, Viktor and Malakzadeh Fard Khangheshlaghi, Abdollah and Lehotai, Levente and Bussiere, Benoit and Falcoz, Franck and Ravet-Senkans, Muriel and Roy, Olivier and Paul, Pierre-Mary and Börzsönyi, Ádám and Varjú, Katalin and Szabó, Gábor and Kalashnikov, Mikhail},
	booktitle = {2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)},
	doi = {10.1109/CLEO/Europe-EQEC57999.2023.10231672},
	unique-id = {34413308},
	year = {2023},
	orcid-numbers = {Bohus, János/0000-0003-1749-4142; Pajer, Viktor/0000-0003-2770-510X; Malakzadeh Fard Khangheshlaghi, Abdollah/0000-0003-4864-2697; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@{MTMT:34413284,
	title = {Multi-TW Laser Pulses in the Single-Cycle Regime by Single Thin Plate Compression},
	url = {https://m2.mtmt.hu/api/publication/34413284},
	author = {Tóth, Szabolcs and Seres, Imre and Lehotai, Levente and Csontos, János and Pajer, Viktor and Farkas, Arnold Péter and Mohácsi, Árpád and Börzsönyi, Ádám and Osvay, Károly and Nagymihály, Roland Sándor},
	booktitle = {2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)},
	doi = {10.1109/CLEO/Europe-EQEC57999.2023.10232099},
	unique-id = {34413284},
	year = {2023},
	orcid-numbers = {Tóth, Szabolcs/0000-0002-8516-3962; Csontos, János/0000-0003-2785-536X; Pajer, Viktor/0000-0003-2770-510X; Farkas, Arnold Péter/0000-0002-9392-7221; Osvay, Károly/0000-0002-3468-8312}
}

@{MTMT:34413249,
	title = {Analysis of Wavelength Dependent Wavefront Deformation in Thin Plate Compressors for Energetic Single-Cycle Laser Pulses},
	url = {https://m2.mtmt.hu/api/publication/34413249},
	author = {Lehotai, Levente and Tóth, Szabolcs and Seres, Imre and Csontos, János and Pajer, Viktor and Börzsönyi, Ádám and Osvay, Károly and Nagymihály, Roland Sándor},
	booktitle = {2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)},
	doi = {10.1109/CLEO/Europe-EQEC57999.2023.10231733},
	unique-id = {34413249},
	year = {2023},
	orcid-numbers = {Tóth, Szabolcs/0000-0002-8516-3962; Csontos, János/0000-0003-2785-536X; Pajer, Viktor/0000-0003-2770-510X; Osvay, Károly/0000-0002-3468-8312}
}

@inproceedings{MTMT:34199490,
	title = {Recent status of the SYLOS 2 laser system of ELI-ALPS},
	url = {https://m2.mtmt.hu/api/publication/34199490},
	author = {Csontos, János and Tóth, Szabolcs and Stanislauskas, T. and Balciunas, I. and Adamonis, J. and Abromavičius, I. and Tóth, László Tamás and Somoskői, Tamás and Prasannan Geetha, Prabhash and Abt, Dániel and Kajla, Barna and Lopez-Martens, Rodrigo and Börzsönyi, Ádám},
	booktitle = {High-Power, High-Energy Lasers and Ultrafast Optical Technologies 2023},
	doi = {10.1117/12.2665699},
	volume = {12577},
	unique-id = {34199490},
	abstract = {This manuscript presents the most recent upgrades made on SYLOS2 laser system in ELI-ALPS1. These modifications on the system were done based on the feedback from the experimental end-stations during the last 3 years. First, the long virtual propagation of the super-Gaussian output beam reduced by modifying the imaging telescope after the amplification stages, which significantly improved the beam profile hindered by the propagation-related diffraction pattern. The optical parametric chirped pulse amplification (OPCPA) stages were equipped with new nonlinear crystals which enabled to reach 42 mJ output energy with <8 fs pulse duration, which is 10 mJ more than the previous configuration. To increase the high-harmonic generation (HHG) efficiency a spatial filter was installed in the laser system which provides a nearly Gaussian beam profile at the output with 80% transmission. The spatial filter is based on a glass cone and is operated under vacuum. Currently, >20 mJ, <8 fs CEP-stable pulses are provided at the user stations after the beam transport system. © 2023 SPIE.},
	keywords = {ULTRASHORT PULSES; Nonlinear optics; Parametric amplification; Parametric amplification; High harmonic generation; Harmonic generation; Gaussian beams; Laser systems; Laser optics; Spatial filters; Optical parametric amplifiers; high-harmonic generation; Beamforming; OPCPA; spatial filter; Super-Gaussian; Optical parametric chirped pulses amplification; TW-level; TW-level; End stations; Gaussian output; Recent status},
	year = {2023},
	orcid-numbers = {Csontos, János/0000-0003-2785-536X; Tóth, Szabolcs/0000-0002-8516-3962; Somoskői, Tamás/0000-0003-1696-4085; Prasannan Geetha, Prabhash/0000-0003-4051-368X; Lopez-Martens, Rodrigo/0000-0001-6788-7791}
}

@article{MTMT:34088981,
	title = {Ion acceleration with few-cycle relativistic laser pulses from foil targets},
	url = {https://m2.mtmt.hu/api/publication/34088981},
	author = {Ter-Avetisyan, Sargis and Varmazyar, Parvin and Singh, Prashant K and Son, Joon-Gon and Füle, Miklós Jenő and Bychenkov, Valery Yu and Farkas, Balázs and Nelissen, Kwinten and Mondal, Sudipta and Papp, Dániel and Börzsönyi, Ádám and Csontos, János and Lécz, Zsolt and Somoskői, Tamás and Tóth, László Tamás and Tóth, Szabolcs and Andriy, Velyhan and Margarone, Daniele and Necas, Ales and Mourou, Gerard and Szabó, Gábor and Osvay, Károly},
	doi = {10.1088/1361-6587/acde0a},
	journal-iso = {PLASMA PHYS CONTR F},
	journal = {PLASMA PHYSICS AND CONTROLLED FUSION},
	volume = {65},
	unique-id = {34088981},
	issn = {0741-3335},
	abstract = {Ion acceleration resulting from the interaction of 11 fs laser pulses of ∼ 35 mJ energy with ultrahigh contrast (<10 −10 ) and 10 19 W cm −2 peak intensity with foil targets made of various materials and thicknesses at normal (0°) and 45° laser incidence is investigated. The maximum energy of the protons reached ∼1.4 MeV accelerated in the laser propagation direction and ∼1.2 MeV in the opposite direction from a formvar target. The energy conversion efficiency from the laser to the proton beam is estimated to be as high as ∼1.4% at 45° laser incidence using a 51 nm thick Al target. The high laser contrast indicates the predominance of vacuum heating via Brunel’s effect as an absorption mechanism involving a tiny pre-plasma at the target front. The experimental results are in reasonable agreement with theoretical estimates, where proton acceleration from the target front side in the backward direction is well explained by the Coulomb explosion of a charged cavity formed in a tiny pre-plasma, while forward proton acceleration is likely to be a two-step process: protons are first accelerated in the target front-side cavity and then further boosted in energy through the target back side via the target normal sheath acceleration (TNSA) mechanism.},
	year = {2023},
	eissn = {1361-6587},
	orcid-numbers = {Ter-Avetisyan, Sargis/0000-0003-3842-6472; Füle, Miklós Jenő/0000-0001-6996-2329; Bychenkov, Valery Yu/0000-0001-9624-3813; Nelissen, Kwinten/0000-0002-0646-1671; Mondal, Sudipta/0000-0002-1789-9433; Papp, Dániel/0000-0002-7954-3686; Csontos, János/0000-0003-2785-536X; Lécz, Zsolt/0000-0001-5968-8012; Somoskői, Tamás/0000-0003-1696-4085; Tóth, Szabolcs/0000-0002-8516-3962; Szabó, Gábor/0000-0001-6756-4677; Osvay, Károly/0000-0002-3468-8312}
}

@article{MTMT:33543921,
	title = {Single thin-plate compression of multi-TW laser pulses to 3.9 fs},
	url = {https://m2.mtmt.hu/api/publication/33543921},
	author = {Tóth, Szabolcs and Nagymihály, Roland Sándor and Seres, Imre and Lehotai, Levente and Csontos, János and Tóth, László Tamás and Prasannan Geetha, Prabhash and Somoskői, Tamás and Kajla, Barna and Abt, Dániel and Pajer, Viktor and Farkas, Arnold Péter and Mohácsi, Árpád and Börzsönyi, Ádám and Osvay, Károly},
	doi = {10.1364/OL.478253},
	journal-iso = {OPT LETT},
	journal = {OPTICS LETTERS},
	volume = {48},
	unique-id = {33543921},
	issn = {0146-9592},
	abstract = {Post-compression of 12-fs laser pulses with multi-TW peak power from an optical parametric chirped pulse amplification (OPCPA) system was performed by using a single thin fused silica plate in a vacuum. By optimizing the input pulses in both spatial and temporal domains, after compression with customized chirped mirrors, we achieved pulses as short as 3.87 fs, in combination with 12-mJ energy. The spatio-spectral quality of the post-compressed pulses was thoroughly analyzed. The generated 1.4-cycle pulses pave the way for next generation attosecond and particle acceleration experiments.},
	year = {2023},
	eissn = {1539-4794},
	pages = {57-60},
	orcid-numbers = {Tóth, Szabolcs/0000-0002-8516-3962; Csontos, János/0000-0003-2785-536X; Prasannan Geetha, Prabhash/0000-0003-4051-368X; Somoskői, Tamás/0000-0003-1696-4085; Pajer, Viktor/0000-0003-2770-510X; Farkas, Arnold Péter/0000-0002-9392-7221; Osvay, Károly/0000-0002-3468-8312}
}

@{MTMT:33564743,
	title = {High-repetition rate neutron source by few-cycle intense laser pulse},
	url = {https://m2.mtmt.hu/api/publication/33564743},
	author = {Singh, P.K. and Füle, Miklós Jenő and Gilinger, T. and Kis, B. and Ter-Avetisyan, Sargis and Varmazyar, P. and Korkulu, Z. and Stuhl, László and Biró, Barna and Csedreki, László and Elekes, Zoltán and Fenyvesi, András and Fülöp, Zsolt and Halász, Zoltán and Kuti, István and Börzsönyi, Ádám and Csontos, János and Farkas, Arnold Péter and Mohácsi, Árpád and Somoskői, Tamás and Szabó, Gábor and Tóth, Szabolcs and Osvay, K.},
	booktitle = {48th EPS Conference on Plasma Physics, EPS 2022},
	unique-id = {33564743},
	year = {2022},
	orcid-numbers = {Füle, Miklós Jenő/0000-0001-6996-2329; Ter-Avetisyan, Sargis/0000-0003-3842-6472; Csontos, János/0000-0003-2785-536X; Farkas, Arnold Péter/0000-0002-9392-7221; Somoskői, Tamás/0000-0003-1696-4085; Szabó, Gábor/0000-0001-6756-4677; Tóth, Szabolcs/0000-0002-8516-3962}
}