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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:19 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Towards multi-PW laser pulse peak power by thin film compression
Authors:
Razvan UNGUREANU(1,2), Gabriel COJOCARU (1,2), Mihai SERBANESCU(1), Razvan DABU(3), Jonathan WHEELER(4), Gerard MOUROU(4)
*
Affiliation:
1)Center for Advanced Laser Technologies (CETAL) - National Institute for Laser, Plasma and Radiation
Physics (INFLPR), 409 Atomistilor, Magurele 077125, Romania.
2)Faculty of Physics, University of Bucharest, 405 Atomistilor Str., 077125 Magurele, Romania
3)Extreme Light Infrastructure Nuclear Physics (ELI-NP) National Institute for R&D in Physics andNuclear Engineering (IFIN-HH), Magurele-Bucharest, Romania
4)DER-IZEST, Ecole Polytechnique, 91128 Palaiseau Cedex, France
E-mail
razvan.ungureanu@inflpr.ro; gabriel.cojocaru@inflpr.ro; mihai.serbanescu@inflprro;razvan.dabu@eli-np.ro; jonathan.wheeler@polytechnique.edu; gerard.mourou@polytechnique.edu
Keywords:
high power laser, pulse brodening, self phase modulation, pulse compresion, thin plastic film
Abstract:
Using the standard technology for peak intensity enhancing of high energy pulsed laser systems typically requires serious investments in cutting edge tools development with the goal of increasing the energy contained within the pulse. An alternative method is to further compress the existing pulse energy within a reduced time duration.
Preliminary experiments at the CETAL 1 PW laser facility demonstrate the reduction of a pulse duration from 46 fs down to 29 fs for a portion of the pulse by using self-phase modulation effect in thin plastic films and consequent spectral phase correction, [1]-[2]. The proposed compression scheme relies upon using a thin film of thermoplastic or glass to act as a nonlinear medium and spectrally broadens the pulse through SPM within the thin film material, n = n0 + n2I. The requirement for a sub-millimeter thickness over 20 cm clear aperture sizes makes plastic an attractive material due to the relatively easy fabrication and affordable cost when compared to traditional crystal or glass-based media with. The re-compression of the chirped pulse produced is performed by reflection from a series of multilayer dielectric chirped mirrors introducing negative dispersion as required to properly phase the frequency content of the pulse.
These efficient methods of pulse post-compression offer the opportunity to enhance the existing laser facility intensities and offer a broader range of high-intensity physics to become more readily attainable. This suggests that the peak power of current PW, or near PW level laser systems have the capacity to be extended up to the level of few PW, depending on the number of stages of post- compression stages implemented.
References:
[1] G. Mourou, S. Mironov, E. Khazanov, and A. Sergeev, “Single cycle thin film compressor opening the door to Zeptosecond-Exawatt physics,” Eur. Phys. J. Spec. Top., vol. 223, no. 6, pp. 1181–1188, Jun. 2014.
[2] S. Y. Mironov, J. Wheeler, R. Gonin, G. Cojocaru, R. Ungureanu, R. Banici, M. Serbanescu, R. Dabu,G. Mourou, and E. A. Khazanov, “100 J-level pulse compression for peak power enhancement,” Quantum Electron., vol. 47, no. 3, pp. 173–178, Mar. 2017
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