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您的检索式：作者名="Victor Hariton"
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| 1 | Ultra-broadband near-infrared NOPAs based on the nonlinear crystals Bi BO and YCOB显示文摘We evaluate and demonstrate ultra-broadband near-infrared noncollinear optical parametric amplification in two nonlinear crystals,bismuth borate(Bi BO)and yttrium calcium oxyborate(YCOB),which are not commonly used for this application.The spectral bandwidth is of the microjoule level;the amplified signal is≥200 nm,capable of supporting sub-10 fs pulses.These results,supported by numerical simulations,show that these crystals have a great potential as nonlinear media in both low-energy,few-cycle systems and high peak power amplifiers for terawatt to petawatt systems based on noncollinear optical parametric chirped pulse amplification(NOPCPA)or a hybrid. | Mario Galletti Hugo Pires Victor Hariton Joana Alves Pedro Oliveira Marco Galimberti Goncalo Figueira | 2020 | High Power Laser Science and Engineering2020，8，3： | 1 |
| 2 | Thermal lens analysis in a diode-pumped 10 Hz 100 mJ Yb:YAG amplifier显示文摘We address the power scaling issue in end-pumped laser rod amplifiers by studying,experimentally and numerically,the magnitude of thermal lensing in a high-energy diode-pumped Yb:YAG crystal.The spatio-temporal temperature profile of the gain medium and the focal length of the induced thermal lens are determined numerically.The influence of the repetition rate and pumping power on the temperature distribution is analyzed.Experimental measurements covered repetition rates between 1 and 10 Hz and up to 4 kW pumping power. | Victor Hariton Celso Paiva Joao Hugo Pires Mario Galletti Goncalo Figueira | 2020 | High Power Laser Science and Engineering2020，8，2： | 1 |
| 3 | High efficiency second harmonic generation of nanojoule-level femtosecond pulses in the visible based on BiBO显示文摘We demonstrate high efficiency second harmonic generation(SHG) of near infrared femtosecond pulses using a BiB3 O6 crystal in a single-pass tight focusing geometry setup. A frequency doubling efficiency of 63% is achieved, which is,to the best of our knowledge, the highest value ever reported in the femtosecond regime for such low energy(nJ-level)pumping pulses. Theoretical analyses of the pumping scheme focusing waist and the SHG efficiency are performed, by numerically solving the three wave mixing coupled equations in the plane-wave scenario and by running simulations with a commercial full 3 D code. Simulations show a good agreement with the experimental data regarding both the efficiency and the pulse spectral profile. The simulated SHG pulse temporal profile presents the characteristic features of the group velocity mismatch broadening in a ‘thick' crystal. | Mario Galletti Hugo Pires Victor Hariton Celso Paiva Joao Swen Künzel Marco Galimberti Goncalo Figueira | 2019 | High Power Laser Science and Engineering2019，7，1： | 0 |
| 4 | Ultrashort pulse capability at the L2I high intensity laser facility显示文摘The Laboratory for Intense Lasers(L2I) is a research centre in optics and lasers dedicated to experimental research in high intensity laser science and technology and laser plasma interaction. Currently the laboratory is undergoing an upgrade with the goal of increasing the versatility of the laser systems available to the users, as well as increasing the pulse repetition rate. In this paper we review the current status of the laser research and development programme of this facility, namely the upgraded capability and the recent progress towards the installation of an ultrashort, diode-pumped OPCPA laser system. | Gonqalo Figueira Joana Alves Joao M.Dias Marta Fajardo Nuno Gomes Victor Hariton Tayyab Imran Celso P.Joao Jayanath Koliyadu Swen Kunzel Nelson C.Lopes Hugo Pires Filipe Ruao Gareth Williams | 2017 | High Power Laser Science and Engineering2017，5，1： | 0 |
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