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Your search keyword '"Kurdi, G"' showing total 7 results
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7 results on '"Kurdi, G"'

1. The FERMI free-electron lasers

Author

Allaria E., Badano L., Bassanese S., Capotondi F., Castronovo D., Cinquegrana P., Danailov M.B., D'Auria G., Demidovich A., De Monte R., De Ninno G., Di Mitri S., Diviacco B., Fawley W.M., Ferianis M., Ferrari E., Gaio G., Gauthier D., Giannessi L., Iazzourene F., Kurdi G., Mahne N., Nikolov I., Parmigiani F., Penco G., Raimondi L., Rebernik P., Rossi F., Roussel E., Scafuri C., Serpico C., Sigalotti P., Spezzani C., Svandrlik M., Svetina C., Trovo M., Veronese M., Zangrando D., Zangrando M., Giannessi, L., Allaria, E, Badano, L., Bassanese, S., Capotondi, Flavio, Castronovo, D., Cinquegrana, Paolo, Danailov, M. B., D'Auria, G., Demidovich, A., De Monte, R., DE NINNO, Giovanni, DI MITRI, Simone, Diviacco, Bruno, Fawley, W. M., Ferianis, M., Ferrari, Eugenio, Gaio, G., Gauthier, D., Iazzourene, F., Kurdi, G., Mahne, N., Nikolov, I., Parmigiani, Fulvio, Penco, G., Raimondi, L., Rebernik, P., Rossi, F., Roussel, E., Scafuri, C., Serpico, Claudio, Sigalotti, P., Spezzani, C., Svandrlik, M., Svetina, Cristian, Trovò, Mauro, Veronese, M., Zangrando, D., and Zangrando, M.

Subjects
Nuclear and High Energy Physics, Extreme ultraviolet lithography, 02 engineering and technology, Radiation, 01 natural sciences, law.invention, Optics, free-electron laser, law, 0103 physical sciences, 010306 general physics, coherence Special issue on X-ray Free-Electron Laser, Instrumentation, Nuclear and High Energy Physic, Physics, coherence Special issue on X-ray Free-Electron Lasers, lasers, free-electron lasers, business.industry, Wavelength range, Free-electron laser, 021001 nanoscience & nanotechnology, Laser, laser, Extreme ultraviolet, Optoelectronics, 0210 nano-technology, business, Coherence (physics), Fermi Gamma-ray Space Telescope
Abstract

FERMI is a seeded free-electron laser (FEL) facility located at the Elettra laboratory in Trieste, Italy, and is now in user operation with its first FEL line, FEL-1, covering the wavelength range between 100 and 20 nm. The second FEL line, FEL-2, a high-gain harmonic generation double-stage cascade covering the wavelength range 20–4 nm, has also completed commissioning and the first user call has been recently opened. An overview of the typical operating modes of the facility is presented.

Published
2015

2. Shaping of ultrashort pulses using bulk acousto-optic filter.

Author

Maák, P., Kurdi, G., Barócsi, A., Osvay, K., Kovács, A.P., Jakab, L., and Richter, P.

Subjects
*ULTRASHORT laser pulses, *ACOUSTOOPTICAL devices, *ACOUSTIC filters, *FLUORIMETRY, *LIGHT modulators, *OPTICS, *FOURIER transform infrared spectroscopy, *FOURIER transform optics
Abstract

Our paper deals with temporal shaping of ultrashort pulses by direct spectral filtering performed with bulk acousto-optic filters using noncollinear geometry. This geometry allows arbitrary optical pulse repetition rate and high diffraction efficiency at relatively large optical apertures. A theoretical model of the pulse shaper is presented, emphasizing the degrees of freedom in this shaping technique. Phase and angular dispersion effects are analyzed, and experimental results on generating controllable pulse trains are presented. [ABSTRACT FROM AUTHOR]

Published
2006
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3. Broadband amplification of ultraviolet laser pulses.

Author

Osvay, K., Kurdi, G., Klebniczki, J., Csatari, M., Ross, I.N., Divall, E.J., Hooker, C.J., and Langley, A.J.

Subjects
*LASER beams, *ULTRAVIOLET radiation, *OPTICS
Abstract

Broadband amplification of laser pulses at 400 nm is demonstrated with a maximum gain of 3550 using non-collinear optical parametric amplification. Without depleting the pump, the spectral gain was found to be almost flat along the available 17-nm-wide spectrum of the signal pulse. It is also shown that the group velocity difference between the signal and pump pulses eventually results in an even broader amplified spectrum. The extension of this technique to other UV wavelengths can also be accomplished, so that femtosecond laser pulses between 300–400 nm can be directly amplified. [ABSTRACT FROM AUTHOR]

Published
2002
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4. High-precision measurement of angular dispersion in a CPA laser.

Author

Varjú, K., Kovács, A.P., Kurdi, G., and Osvay, K.

Subjects
DISPERSION (Chemistry), LASERS, OPTICS
Abstract

Angular dispersion is measured with the accuracy of 0.2 μrad/nm by a new method based on spectrally resolved interferometry. It is linear, simple and allows for real-time alignment of the stretcher-compressor system of CPA lasers. [ABSTRACT FROM AUTHOR]

Published
2002

5. Measurement of non-compensated angular dispersion and the subsequent temporal lengthening of femtosecond pulses in a CPA laser

Author

Osvay, K., Kovács, A.P., Kurdi, G., Heiner, Z., Divall, M., Klebniczki, J., and Ferincz, I.E.

Subjects
*LASERS, *OPTOELECTRONIC devices, *OPTICS, *NONLINEAR optics
Abstract

Abstract: Closed analytical formulae are given for the residual angular dispersion resulted from the non-parallel surfaces of both a grating pair and a prism pair pulse compressor. Accurate measurements of the angular dispersion of pulses leaving the misaligned pulse compressors agree well with the first principle simulation curves. The corresponding lengthening of the transform limited 18 fs pulses was also determined. Finally, it is experimentally proved that by simultaneous monitoring of angular dispersion and pulse duration, the stretcher–compressor system of a chirped pulse amplification laser can be aligned very precisely. [Copyright &y& Elsevier]

Published
2005
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6. Coherent Soft X-Ray pulses from an Echo-Enabled Harmonic Generation Free-Electron Laser

Author

Eugenio Ferrari, Marco Veronese, Ivan Cudin, C. Scafuri, Emiliano Principi, Roberto Sauro, Lorenzo Raimondi, Davide Vivoda, Mauro Trovò, Paolo Sigalotti, M. Zaccaria, M. Svandrlik, Mihai Pop, D. Zangrando, Paolo Cinquegrana, Flavio Capotondi, Giulio Gaio, Carlo Spezzani, Bruno Diviacco, Giuseppe Penco, G. Kurdi, Simone Spampinati, Amin Ghaith, W. M. Fawley, Claudio Masciovecchio, Marcello Coreno, Marco Cautero, L. Badano, David Garzella, Fatma Iazzourene, Nicola Mahne, Eléonore Roussel, Vanessa Grattoni, Giovanni De Ninno, L. Sturari, F. Giacuzzo, Laura Foglia, Niky Bruchon, Dao Xiang, Ivaylo Nikolov, T. Tanikawa, Marie Emmanuelle Couprie, Primož Rebernik Ribič, S. Grulja, Miltcho B. Danailov, Chao Feng, Luca Giannessi, D. Castronovo, Mario Ferianis, Enrico Allaria, Marco Zangrando, Alexander Demidovich, A. Abrami, M. Bossi, Najmeh Mirian, Paolo Miotti, Gregory Penn, Fabio Frassetto, Eduard Prat, Michele Manfredda, Marco Malvestuto, Luca Poletto, Marco Lonza, Erik Hemsing, Hans-Heinrich Braun, Simone Di Mitri, Sven Reiche, Rebernik Ribic, P., Abrami, A., Badano, L., Bossi, M., Braun, H. -H., Bruchon, N., Capotondi, F., Castronovo, D., Cautero, M., Cinquegrana, P., Coreno, M., Couprie, M. E., Cudin, I., Boyanov Danailov, M., De Ninno, G., Demidovich, A., Di Mitri, S., Diviacco, B., Fawley, W. M., Feng, C., Ferianis, M., Ferrari, E., Foglia, L., Frassetto, F., Gaio, G., Garzella, D., Ghaith, A., Giacuzzo, F., Giannessi, L., Grattoni, V., Grulja, S., Hemsing, E., Iazzourene, F., Kurdi, G., Lonza, M., Mahne, N., Malvestuto, M., Manfredda, M., Masciovecchio, C., Miotti, P., Mirian, N. S., Petrov Nikolov, I., Penco, G. M., Penn, G., Poletto, L., Pop, M., Prat, E., Principi, E., Raimondi, L., Reiche, S., Roussel, E., Sauro, R., Scafuri, C., Sigalotti, P., Spampinati, S., Spezzani, C., Sturari, L., Svandrlik, M., Tanikawa, T., Trovo, M., Veronese, M., Vivoda, D., Xiang, D., Zaccaria, M., Zangrando, D., Zangrando, M., Allaria, E. M., Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
echo-enabled harmonic generation, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Physics::Optics, free-electron laser, X-ray, 02 engineering and technology, 01 natural sciences, Mathematical Sciences, law.invention, 010309 optics, Optics, law, 0103 physical sciences, Relativistic electron beam, High harmonic generation, ddc:530, free-electron-laser, Physics, business.industry, Free-electron laser, 021001 nanoscience & nanotechnology, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Optoelectronics & Photonics, Atomic electron transition, Physical Sciences, Harmonic, Cathode ray, Physics::Accelerator Physics, 0210 nano-technology, business, Lasing threshold
Abstract

X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions from core levels. These techniques would benefit tremendously from having a stable FEL source, generating spectrally pure and wavelength-tunable pulses. We show that such requirements can be met by operating the FEL in the so-called echo-enabled harmonic generation (EEHG) configuration. Here, two external conventional lasers are used to precisely tailor the longitudinal phase space of the electron beam before emission of X-rays. We demonstrate high-gain EEHG lasing producing stable, intense, nearly fully coherent pulses at wavelengths as short as 5.9 nm (~211 eV) at the FERMI FEL user facility. Low sensitivity to electron-beam imperfections and observation of stable, narrow-band, coherent emission down to 2.6 nm (~474 eV) make the technique a prime candidate for generating laser-like pulses in the X-ray spectral region, opening the door to multidimensional coherent spectroscopies at short wavelengths. Echo-enabled harmonic generation in a free-electron laser enables 45th harmonic pulses from a 264 nm wavelength seed, yielding 5.9 nm wavelength coherent output.

Published
2019

7. Two-colour pump–probe experiments with a twin-pulse-seed extreme ultraviolet free-electron laser

Author

Emanuele Pedersoli, Cristian Svetina, Simone Spampinati, Paolo Sigalotti, Roberto Borghes, Paolo Cinquegrana, C. Serpico, Lorenzo Raimondi, David Gauthier, Flavio Capotondi, P. Charalambous, G. Kurdi, L. Froehlich, R. Ivanov, Ivaylo Nikolov, Carlo Spezzani, Filippo Bencivenga, Nicola Mahne, Miltcho B. Danailov, Alexander Demidovich, Benoît Mahieu, Eugenio Ferrari, Giuseppe Penco, Bruno Diviacco, Luca Giannessi, G. De Ninno, Marco Zangrando, Mauro Trovò, Enrico Allaria, Alessandro Gessini, S. Di Mitri, D. Castronovo, W. M. Fawley, Maya Kiskinova, Claudio Masciovecchio, Daniele Fausti, Sincrotrone Trieste, NEST-INFM (INFM), National Institute for Nuclear Physics (INFN), School of Applied Sciences, University of Nova Gorica, Techniques of Informatics and Microelectronics for integrated systems Architecture (TIMA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Elettra Sincrotrone Trieste, Laboratoire d'optique appliquée (LOA), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-École Nationale Supérieure de Techniques Avancées (ENSTA Paris), CNR Istituto Officina dei Materiali (IOM), Consiglio Nazionale delle Ricerche [Roma] (CNR), Istituto Nazionale di Fisica Nucleare (INFN), Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés (TIMA), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Allaria, E., Bencivenga, F., Borghes, R., Capotondi, Flavio, Castronovo, D., Charalambous, P., Cinquegrana, Paolo, Danailov, M. B., DE NINNO, Giovanni, Demidovich, A., Di Mitri, S., Diviacco, B., Fausti, Daniele, Fawley, W. M., Ferrari, Eugenio, Froehlich, L., Gauthier, D., Gessini, A., Giannessi, L., Ivanov, R., Kiskinova, Maya, Kurdi, G., Mahieu, B., Mahne, N., Nikolov, I., Masciovecchio, C., Pedersoli, E., Penco, G., Raimondi, L., Serpico, Claudio, Sigalotti, P., Spampinati, S., Spezzani, C., Svetina, Cristian, Trovò, Mauro, and Zangrando, M.

Subjects
Diffraction, Genetics and Molecular Biology (all), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], General Physics and Astronomy, Nanotechnology, 01 natural sciences, Biochemistry, Article, General Biochemistry, Genetics and Molecular Biology, 010305 fluids & plasmas, law.invention, Physics and Astronomy (all), Optics, law, 0103 physical sciences, High harmonic generation, 010306 general physics, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Biochemistry, Genetics and Molecular Biology (all), Multidisciplinary, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], business.industry, Chemistry (all), Free-electron laser, Time evolution, General Chemistry, Laser, 3. Good health, Pulse (physics), Extreme ultraviolet, State of matter, business
Abstract

Exploring the dynamics of matter driven to extreme non-equilibrium states by an intense ultrashort X-ray pulse is becoming reality, thanks to the advent of free-electron laser technology that allows development of different schemes for probing the response at variable time delay with a second pulse. Here we report the generation of two-colour extreme ultraviolet pulses of controlled wavelengths, intensity and timing by seeding of high-gain harmonic generation free-electron laser with multiple independent laser pulses. The potential of this new scheme is demonstrated by the time evolution of a titanium-grating diffraction pattern, tuning the two coherent pulses to the titanium M-resonance and varying their intensities. This reveals that an intense pulse induces abrupt pattern changes on a time scale shorter than hydrodynamic expansion and ablation. This result exemplifies the essential capabilities of the jitter-free multiple-colour free-electron laser pulse sequences to study evolving states of matter with element sensitivity., Free-electron lasers are a powerful new tool for studying properties and transient states of matter. Here, the authors use a novel seed scheme for generation of two XUV laser pulses of controlled wavelength and time separation that enables access to ultrafast phenomena with elemental sensitivity.

Published
2013

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