TY - JOUR AU - Pajer, Viktor AU - Bohus, János AU - Malakzadeh Fard Khangheshlaghi, Abdollah AU - Lehotai, Levente AU - Kalashnikov, Mikhail AU - Seres, Imre AU - Gilicze, Barnabás AU - Kiss, Bálint AU - Börzsönyi, Ádám AU - Varjú, Katalin AU - Szabó, Gábor AU - Nagymihály, Roland Sándor TI - Systematic comparison of commercial devices for temporal characterization of few-cycle laser pulses in the 500-1000 nm spectral range JF - OPTICS EXPRESS J2 - OPT EXPRESS VL - 32 PY - 2024 IS - 9 SP - 15710 EP - 15722 PG - 13 SN - 1094-4087 DO - 10.1364/OE.509583 UR - https://m2.mtmt.hu/api/publication/34836411 ID - 34836411 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Nagymihály, Roland Sándor AU - Falcoz, Franck AU - Bussiere, Benoit AU - Bohus, János AU - Pajer, Viktor AU - Lehotai, Levente AU - Ravet-Senkans, Muriel AU - Roy, Olivier AU - Calvez, Steven AU - Mollica, Florian AU - Branly, Stephane AU - Paul, Pierre-Mary AU - Börzsönyi, Ádám AU - Varjú, Katalin AU - Szabó, Gábor AU - Kalashnikov, Mikhail TI - The petawatt laser of ELI ALPS: reaching the 700 TW level at 10 Hz repetition rate JF - OPTICS EXPRESS J2 - OPT EXPRESS VL - 31 PY - 2023 IS - 26 SP - 44160 EP - 44176 PG - 17 SN - 1094-4087 DO - 10.1364/OE.509615 UR - https://m2.mtmt.hu/api/publication/34489471 ID - 34489471 N1 - ELI ALPS Research Institute, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, Szeged, 6728, Hungary Amplitude, 2-4 rue du Bois Chaland, CE 2926, Evry, 91029, France Export Date: 2 February 2024 Funding details: European Regional Development Fund, ERDF, GINOP-2.3.6-15-2015-00001 Funding text 1: European Regional Development Fund (GINOP-2.3.6-15-2015-00001). We greatly acknowledge the contribution of Károly Osvay, Vladimir Chvykov, Huabao Cao, Nikita Khodakovskiy, Julien Houzet, Mathieu Paurisse, Alexandre Thai, Catalin Neacsu, Djamel-Dean Braham, Vincent Trubert, Pierrick Leroy, Ivan Delgado, Hugo Caherec, Abdollah Malakzadeh, Árpád Mohácsi, Arnold Farkas, Frederic Estable, David Armier, and Gilles Riboulet to this project. AB - 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. LA - English DB - MTMT ER - TY - CHAP AU - Jójárt, Péter AU - Seres, Imre AU - Bengery, Zsolt Gábor AU - Gilicze, Barnabás AU - Várallyay, Zoltán Krisztián AU - Börzsönyi, Ádám AU - Shestaev, Evgeny AU - Walther, Nico AU - Tschernajew, Maxim AU - Grebing, Christian AU - Breitkopf, Sven AU - Eidam, Tino AU - Limpert, Jens TI - Status of the ELI-ALPS High Repetition Rate (HR) Laser Systems T2 - 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) PB - IEEE CY - Online kiadás SN - 9798350345995 PY - 2023 PG - 1 DO - 10.1109/CLEO/Europe-EQEC57999.2023.10231605 UR - https://m2.mtmt.hu/api/publication/34413317 ID - 34413317 LA - English DB - MTMT ER - TY - CHAP AU - Nagymihály, Roland Sándor AU - Bohus, János AU - Pajer, Viktor AU - Malakzadeh Fard Khangheshlaghi, Abdollah AU - Lehotai, Levente AU - Bussiere, Benoit AU - Falcoz, Franck AU - Ravet-Senkans, Muriel AU - Roy, Olivier AU - Paul, Pierre-Mary AU - Börzsönyi, Ádám AU - Varjú, Katalin AU - Szabó, Gábor AU - Kalashnikov, Mikhail TI - First Operation Phase of the 10 Hz 2 PW Laser of ELI ALPS T2 - 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) PB - IEEE CY - Online kiadás SN - 9798350345995 PY - 2023 PG - 1 DO - 10.1109/CLEO/Europe-EQEC57999.2023.10231672 UR - https://m2.mtmt.hu/api/publication/34413308 ID - 34413308 LA - English DB - MTMT ER - TY - CHAP AU - Tóth, Szabolcs AU - Seres, Imre AU - Lehotai, Levente AU - Csontos, János AU - Pajer, Viktor AU - Farkas, Arnold Péter AU - Mohácsi, Árpád AU - Börzsönyi, Ádám AU - Osvay, Károly AU - Nagymihály, Roland Sándor TI - Multi-TW Laser Pulses in the Single-Cycle Regime by Single Thin Plate Compression T2 - 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) PB - IEEE CY - Online kiadás SN - 9798350345995 PY - 2023 PG - 1 DO - 10.1109/CLEO/Europe-EQEC57999.2023.10232099 UR - https://m2.mtmt.hu/api/publication/34413284 ID - 34413284 LA - English DB - MTMT ER - TY - CHAP AU - Lehotai, Levente AU - Tóth, Szabolcs AU - Seres, Imre AU - Csontos, János AU - Pajer, Viktor AU - Börzsönyi, Ádám AU - Osvay, Károly AU - Nagymihály, Roland Sándor TI - Analysis of Wavelength Dependent Wavefront Deformation in Thin Plate Compressors for Energetic Single-Cycle Laser Pulses T2 - 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) PB - IEEE CY - Online kiadás SN - 9798350345995 PY - 2023 PG - 1 DO - 10.1109/CLEO/Europe-EQEC57999.2023.10231733 UR - https://m2.mtmt.hu/api/publication/34413249 ID - 34413249 LA - English DB - MTMT ER - TY - CHAP AU - Csontos, János AU - Tóth, Szabolcs AU - Stanislauskas, T. AU - Balciunas, I. AU - Adamonis, J. AU - Abromavičius, I. AU - Tóth, László Tamás AU - Somoskői, Tamás AU - Prasannan Geetha, Prabhash AU - Abt, Dániel AU - Kajla, Barna AU - Lopez-Martens, Rodrigo AU - Börzsönyi, Ádám ED - Bakule, P. ED - Haefner, C.L. ED - Hein, J. ED - Butcher, T.J. TI - Recent status of the SYLOS 2 laser system of ELI-ALPS T2 - High-Power, High-Energy Lasers and Ultrafast Optical Technologies 2023 VL - 12577 PB - SPIE CY - Bellingham (WA) SN - 9781510662742 T3 - Proceedings of SPIE, ISSN 0277-786X ; 12577. PY - 2023 PG - 6 DO - 10.1117/12.2665699 UR - https://m2.mtmt.hu/api/publication/34199490 ID - 34199490 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Ter-Avetisyan, Sargis AU - Varmazyar, Parvin AU - Singh, Prashant K AU - Son, Joon-Gon AU - Füle, Miklós Jenő AU - Bychenkov, Valery Yu AU - Farkas, Balázs AU - Nelissen, Kwinten AU - Mondal, Sudipta AU - Papp, Dániel AU - Börzsönyi, Ádám AU - Csontos, János AU - Lécz, Zsolt AU - Somoskői, Tamás AU - Tóth, László Tamás AU - Tóth, Szabolcs AU - Andriy, Velyhan AU - Margarone, Daniele AU - Necas, Ales AU - Mourou, Gerard AU - Szabó, Gábor AU - Osvay, Károly TI - Ion acceleration with few-cycle relativistic laser pulses from foil targets JF - PLASMA PHYSICS AND CONTROLLED FUSION J2 - PLASMA PHYS CONTR F VL - 65 PY - 2023 IS - 8 PG - 9 SN - 0741-3335 DO - 10.1088/1361-6587/acde0a UR - https://m2.mtmt.hu/api/publication/34088981 ID - 34088981 N1 - Funding Agency and Grant Number: Hungarian Ministry of Technology and Innovation [IFHAT/1039-4/2019-ITM_SZERZ]; Hungarian National Research, Development, and Innovation Office through the National Laboratory program [NKFIH-877-2/2020, NKFIH-476-4/2021]; Ministry of Education, Youth and Sports of the Czech Republic [CZ.02.1.010.00.016_0190000789]; Hungarian Government; European Regional Development Fund [GINOP-2.3.6-15-2015-00001]; Ministry of Science and Higher Education of the Russian Federation [075-15-2021-1361] Funding text: The authors are grateful for the fruitful discussions with Christos Kamperidis, Subhendu Kahaly, Martin Matys, Petr Valenta, Georg Korn, Sergei Bulanov, and Zsolt Fueloep. The authors are indebted to Arnold Farkas, Karoly Mogyorosi, Arpad Mohacsi, Rita Szabo, and Bence Kis for their technical help in the experiments. The project has been supported by the Hungarian Ministry of Technology and Innovation (Contract No. IFHAT/1039-4/2019-ITM_SZERZ), the Hungarian National Research, Development, and Innovation Office through the National Laboratory program (Contract Nos. NKFIH-877-2/2020 and NKFIH-476-4/2021), and by the Ministry of Education, Youth and Sports of the Czech Republic through the project Advanced Research Using High-Intensity Laser-Produced Photons and Particles' (CZ.02.1.010.00.016_0190000789). The ELI-ALPS project is supported by the Hungarian Government and the European Regional Development Fund (Contract No. GINOP-2.3.6-15-2015-00001). V Yu B acknowledges support from the Ministry of Science and Higher Education of the Russian Federation (under the agreement No. 075-15-2021-1361). AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Tóth, Szabolcs AU - Nagymihály, Roland Sándor AU - Seres, Imre AU - Lehotai, Levente AU - Csontos, János AU - Tóth, László Tamás AU - Prasannan Geetha, Prabhash AU - Somoskői, Tamás AU - Kajla, Barna AU - Abt, Dániel AU - Pajer, Viktor AU - Farkas, Arnold Péter AU - Mohácsi, Árpád AU - Börzsönyi, Ádám AU - Osvay, Károly TI - Single thin-plate compression of multi-TW laser pulses to 3.9 fs JF - OPTICS LETTERS J2 - OPT LETT VL - 48 PY - 2023 IS - 1 SP - 57 EP - 60 PG - 4 SN - 0146-9592 DO - 10.1364/OL.478253 UR - https://m2.mtmt.hu/api/publication/33543921 ID - 33543921 AB - 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. LA - English DB - MTMT ER - TY - CHAP AU - Singh, P.K. AU - Füle, Miklós Jenő AU - Gilinger, T. AU - Kis, B. AU - Ter-Avetisyan, Sargis AU - Varmazyar, P. AU - Korkulu, Z. AU - Stuhl, László AU - Biró, Barna AU - Csedreki, László AU - Elekes, Zoltán AU - Fenyvesi, András AU - Fülöp, Zsolt AU - Halász, Zoltán AU - Kuti, István AU - Börzsönyi, Ádám AU - Csontos, János AU - Farkas, Arnold Péter AU - Mohácsi, Árpád AU - Somoskői, Tamás AU - Szabó, Gábor AU - Tóth, Szabolcs AU - Osvay, K. ED - Klinger, T ED - Hobirk, J ED - Orlando, S ED - Lancia, L ED - Maric, D TI - High-repetition rate neutron source by few-cycle intense laser pulse T2 - 48th EPS Conference on Plasma Physics, EPS 2022 PB - European Physical Society (EPS) CY - Mulhouse SN - 9791096389162 T3 - Europhysics Conference Abstracts ; 46A. PY - 2022 PG - 1 UR - https://m2.mtmt.hu/api/publication/33564743 ID - 33564743 N1 - National Laser-Initiated Transmutation Laboratory, Uni. of Szeged, Szeged, 6720, Hungary Center for Exotic Nuclear Studies, Institute for Basic Science, Daejeon, South Korea Institute for Nuclear Research (ATOMKI), Debrecen, Hungary ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, Szeged, H-6728, Hungary Dept. Optics and Quantum Electronics, University of Szeged, Szeged, 6720, Hungary Export Date: 16 January 2023 LA - English DB - MTMT ER -