Magali Lozano

Laboratoire d'Optique Appliquée

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Bernard Mahieu

Centre National de la Recherche Scientifique

Rodrigo López-Martens

Centre National de la Recherche Scientifique

Aurélien Houard

Laboratoire d'Optique Appliquée

A. Mysyrowicz

École Polytechnique

Tamás Nagy

Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy

Andreas Blumenstein

Institut für Nanophotonik

A. Rousse

Unity Health Toronto

Pierre Walch

Centre National de la Recherche Scientifique

Maïmouna Bocoum

Institut Jean Nicod

Jean‐Pierre Wolf

University of Geneva

Cooperative Institutions

Centre National de la Recherche Scientifique

Laboratoire d'Optique Appliquée

École Polytechnique

École Nationale Supérieure de Techniques Avancées

Université Paris-Saclay

ParisTech

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Laboratoire Interactions, Dynamiques et Lasers

TRUMPF (Germany)

Sorbonne Université

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Generation of few-cycle pulses with high temporal fidelity via nonlinear ellipse rotation

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Nikita Khodakovskiy M. P. Kalashnikov Brigitte Mercier Viktor Pajer Zhao Cheng

Ellipse

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Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers

Optics Express (2015)

Bernard Mahieu David Gauthier G. De Ninno Hugo Dacasa Magali Lozano

We present a setup for complete characterization of femtosecond pulses generated by seeded free-electron lasers (FELs) in the extreme-ultraviolet spectral region. Two delayed and spectrally shifted replicas are produced and used for spectral phase interferometry for direct electric field reconstruction (SPIDER). We show that it can be achieved by a simple arrangement of the seed laser. Temporal shape and phase obtained in FEL simulations are well retrieved by SPIDER reconstructions, allowing to foresee the implementation of this diagnostics tool on existing and future sources. This will be a significant step towards an experimental investigation and control of FEL spectral phase.

Extreme ultraviolet

Free electron model

Ultraviolet

10.1364/oe.23.017665

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Citations (9)

Laser Guiding of Consecutive Meter-Scale Discharges in Air

Pierre Walch Léonid Arantchouk Bernard Mahieu Magali Lozano Yves-Bernard André

Femtosecond laser filamentation in air creates long columns of weakly ionized plasma that result in a low-density channel over μs timescale [1]. These channels can trigger and guide electric discharges [2]–[3]. Applications have been proposed for this effect, such as the laser lightning rod [4], or the plasma antenna [5]. The main limitation for the later one is the discharge lifetime limited to microseconds [6], since a plasma antenna would require the existence of a permanent conductive channel. To overcome this limitation, we investigate a regime using consecutive guided discharges with prolonged lifetime that could create a quasi-permanent conductive channel.

Filamentation

Plasma channel

Lightning

Microsecond

10.1109/cleo/europe-eqec57999.2023.10232602

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Extending femtosecond laser superfilamentation in air with a multifocal phase mask

Applied Physics Letters (2024)

Silin Fu A. Mysyrowicz Léonid Arantchouk Magali Lozano Aurélien Houard

Laser filamentation is a spectacular phenomenon where the self-focusing of the laser pulse generates ionizing light channels. Many applications of filamentation, such as the laser lightning rod, require the generation of superfilaments, long plasma channels of higher electron density than normal filaments. Using a multifocal phase mask, we demonstrate an extension of the superfilamentation length of a focused terawatt laser beam. Optimized superfilaments show increased energy deposition compared to a normal gaussian beam and an extension of their length by at least a factor two. When put in contact with a high voltage electrode, the guiding of a single plasma column with a length of ∼1 m is observed. The length of an air waveguide generated by a vortex laser pulse is also increased by a factor 2 in the presence of the phase mask.

Filamentation

10.1063/5.0203415

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Control of Relativistic Plasma-Mirrors with Few-Cycle and Two-Colour Laser Waveforms

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Stefan Haessler Frederik Böhle Maïmouna Bocoum A. Denoeud L. Chopineau

Relativistic plasma

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Relativistic near-single-cycle optics at 1 kHz

arXiv (Cornell University) (2019)

Marie Ouillé Aline Vernier Frederik Boehle Maïmouna Bocoum Magali Lozano

We present a laser source delivering waveform-controlled 1.5-cycle pulses that can be focused to relativistic intensity at 1 kHz repetition rate. These pulses are generated by nonlinear compression of high-temporal-contrast sub-25\,fs pulses from a kHz Ti:Sapphire double-chirped pulse amplifier in a stretched flexible hollow fiber compressor scaled for high peak power. The unique capabilities of this source are demonstrated by observing carrier-envelope phase effects in laser-wakefield acceleration of relativistic electrons for the first time.

Carrier-envelope phase

Pulse compression

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Citations (33)

Polarization control of high order harmonics in the EUV photon energy range

Optics Express (2011)

Boris Vodungbo A. Barszczak Sardinha J. Gautier G. Lambert C. Valentin

We report the generation of circularly polarized high order harmonics in the extreme ultraviolet range (18-27 nm) from a linearly polarized infrared laser (40 fs, 0.25 TW) focused into a neon filled gas cell. To circularly polarize the initially linearly polarized harmonics we have implemented a four-reflector phase-shifter. Fully circularly polarized radiation has been obtained with an efficiency of a few percents, thus being significantly more efficient than currently demonstrated direct generation of elliptically polarized harmonics. This demonstration opens up new experimental capabilities based on high order harmonics, for example, in biology and materials science. The inherent femtosecond time resolution of high order harmonic generating table top laser sources renders these an ideal tool for the investigation of ultrafast magnetization dynamics now that the magnetic circular dichroism at the absorption M-edges of transition metals can be exploited.

Elliptical polarization

Extreme ultraviolet

10.1364/oe.19.004346

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Citations (120)

Relativistic-Intensity Near-Single-Cycle KHz Laser Driver

Marie Ouillé Frederik Boehle Maxence Thévenet Maïmouna Bocoum Aline Vernier

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. Ouillé, F. Boehle, M. Thévenet, M. Bocoum, A. Vernier, M. Lozano, J. -. Rousseau, A. Jullien, S. Haessler, M. Kovacs, P. Simon, T. Nagy, and R. Lopez-Martens, "Relativistic-Intensity Near-Single-Cycle kHz Laser Driver," in High-Brightness Sources and Light-driven Interactions, OSA Technical Digest (online) (Optica Publishing Group, 2018), paper HT2A.3. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

10.1364/hilas.2018.ht2a.3

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Laser-guided lightning

arXiv (Cornell University) (2022)

Aurélien Houard Pierre Walch Thomas Produit Victor Moreno Bernard Mahieu

Electric currents circulating between charged clouds and the earth surface during lightning discharges are responsible for considerable damages and casualties. It is therefore important to develop better protection methods in addition to the traditional Franklin rod. Here we present the first demonstration that filaments formed by short and intense laser pulses can guide lightning discharges over considerable distances. We believe that this experimental breakthrough will lead to progress in lightning protection and lightning physics. An experimental campaign was carried out on the Säntis Mountain in Northeastern Switzerland during the Summer of 2021 with a high repetition rate terawatt laser. The guiding of an upward negative lightning leader over a distance of 50 m was recorded by two separate high-speed cameras. The guiding of negative lightning leaders by laser filaments was corroborated in three other instances by VHF interferometric measurements, and the number of X-ray bursts detected during guided lightning events was significantly increased. While this research field has been very active for more than 20 years with many research groups around the world working to achieve this goal, this result demonstrates lightning guiding by lasers, which may lead to the development of a laser lightning rod. This work paves the way for new atmospheric applications of ultrashort lasers and represents a significant step forward in the development of a laser based lightning protection for airports, launchpads or large infrastructures.

Lightning

10.48550/arxiv.2207.03769

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Citations (1)

Relativistic-intensity near-single-cycle light source at 1kHz

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Marie Ouillé Aline Vernier Frederik Boehle Maïmouna Bocoum Magali Lozano

Intensity

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