Dr. Eric Freysz Profile

Dr. Eric Freysz

at CNRS LOMA UMR5798

SPIE Involvement:

Author

Publications (8)

Proceedings Article | 8 March 2019 Presentation

High power fiber laser drilling process for ceramic coated helicopter combustion chambers (Conference Presentation)

Minh-Hoang Nguyen, Cyrille Delor, Eric Freysz

Proceedings Volume 10911, 109110O (2019) https://doi.org/10.1117/12.2505812

KEYWORDS: Laser drilling, Combustion, Ceramics, High power fiber lasers, Laser processing, Metals, NOx, Laser development, Laser beam propagation, Cobalt

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Proceedings Article | 4 March 2019 Presentation + Paper

Tunable and chirp free femtosecond signal pulses generated by a PPLN OPO pumped by Ytterbium fiber laser chirped pulses

Gabriel Amiard Hudebine, Eric Freysz

Proceedings Volume 10902, 109020M (2019) https://doi.org/10.1117/12.2505870

KEYWORDS: Optical parametric oscillators, Picosecond phenomena, Femtosecond phenomena, Ytterbium, Fiber lasers, Nonlinear crystals

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Proceedings Article | 4 March 2019 Paper

Compact and versatile OPG-OPA based on a periodically poled nonlinear crystal pumped by femtosecond Ytterbium fiber laser

Valerian Freysz, Gabriel Amiard-Hudebine, Yoann Zaouter, Eric Freysz

Proceedings Volume 10902, 109021J (2019) https://doi.org/10.1117/12.2505769

KEYWORDS: Femtosecond phenomena, Nonlinear crystals, Ytterbium, Fiber lasers, Optical parametric oscillators

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Proceedings Article | 18 March 2016 Paper

Can fiber laser improve high speed multi-pulse drilling of aeronautic alloy?

M. Nguyen, C. Loumena, A. Bussière, R. Kling, C. Delor, E. Freysz

Proceedings Volume 9741, 974107 (2016) https://doi.org/10.1117/12.2211834

KEYWORDS: Fiber lasers, Laser drilling, Laser processing, Lamps, Inspection, Laser sources, Tunable lasers, Laser systems engineering, Lasers, Materials processing, Nd:YAG lasers, Pulsed laser operation, Head, Pulsed fiber lasers, High power fiber lasers

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Proceedings Article | 14 March 2015 Paper

Terahertz wavefront assessment based on 2D electro-optic imaging

Harsono Cahyadi, Ryuji Ichikawa, Jérôme Degert, Eric Freysz, Takeshi Yasui, Emmanuel Abraham

Proceedings Volume 9362, 936209 (2015) https://doi.org/10.1117/12.2078450

KEYWORDS: Terahertz radiation, Wavefronts, Sensors, Spherical lenses, Cameras, Electro optics, Crystals, Wavefront reconstruction, Picosecond phenomena, Imaging systems

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Complete characterization of terahertz (THz) radiation becomes an interesting yet challenging study for many years. In visible optical region, the wavefront assessment has been proved as a powerful tool for the beam profiling and characterization, which consequently requires 2-dimension (2D) single-shot acquisition of the beam cross-section to provide the spatial profile in time- and frequency-domain. In THz region, the main problem is the lack of effective THz cameras to satisfy this need. In this communication, we propose a simple setup based on free-space collinear 2D electrooptic sampling in a ZnTe crystal for the characterization of THz wavefronts.

In principle, we map the optically converted, time-resolved data of the THz pulse by changing the time delay between the probe pulse and the generated THz pulse. The temporal waveforms from different lens-ZnTe distances can clearly indicate the evolution of THz beam as it is converged, focused, or diverged. From the Fourier transform of the temporal waveforms, we can obtain the spectral profile of a broadband THz wave, which in this case within the 0.1-2 THz range. The spectral profile also provides the frequency dependency of the THz pulse amplitude. The comparison between experimental and theoretical results at certain frequencies (here we choose 0.285 and 1.035 THz) is in a good agreement suggesting that our system is capable of THz wavefront characterization. Furthermore, the implementation of Hartmann/Shack-Hartmann sensor principle enables the reconstruction of THz wavefront. We demonstrate the reconstruction of THz wavefronts which are changed from planar wave to spherical one due to the insertion of convex THz lens in the THz beam path. We apply and compare two different reconstruction methods: linear integration and Zernike polynomial. Roughly we conclude that the Zernike method provide smoother wavefront shape that can be elaborated later into quantitative-qualitative analysis about the wavefront distortion.

Proceedings Article | 11 February 2011 Paper

Ten watts actively mode-locked ytterbium doped fiber laser delivering 15 ps at 40 MHz

Pierre Deslandes, Damien Sangla, Julien Saby, François Salin, Eric Freysz

Proceedings Volume 7914, 79140Z (2011) https://doi.org/10.1117/12.874419

KEYWORDS: Mode locking, Fiber lasers, Picosecond phenomena, Oscillators, Photonic crystal fibers, Ytterbium, Pulsed laser operation, Modulators, Mirrors, Amplitude modulation

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Proceedings Article | 3 February 2006 Paper

Multi-petawatt high-energy laser project on the LIL facility in Aquitaine

N. Blanchot, E. Bignon, H. Coїc, A. Cotel, E. Couturier, G. Deschaseaux, N. Forget, E. Freysz, E. Hugonnot, C. Le Blanc, N. Loustalet, J. Luce, G. Marre, A. Migus, S. Montant, S. Mousset, S. Noailles, J. Néauport, C. Rouyer, C. Rullière, C. Sauteret, L. Videau, P. Vivini

Proceedings Volume 5975, 59750C (2006) https://doi.org/10.1117/12.675495

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Proceedings Article | 7 June 2005 Paper

Periodic ripples produced by a scanning beam of a femtosecond Ti:sapphire laser

E. Freysz, S. Pershin, G. Shafeev

Proceedings Volume 5850, (2005) https://doi.org/10.1117/12.633678

KEYWORDS: Solids, Femtosecond phenomena, Germanium, Sapphire lasers, Atomic force microscopy, Electromagnetic radiation, Gallium arsenide, Laser ablation, Dielectrics, Metals

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Showing 5 of 8 publications

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