Dr. Marine Chorel Profile

Dr. Marine Chorel

at CEA-Cesta

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 24 November 2023 Poster

Development of mixed materials to improve the laser-induced damage threshold of multilayer dielectric mirrors for petawatt class lasers

Océane Aubard, Marine Chorel, Eric Lavastre, Corinne Marcel

Proceedings Volume PC12726, PC1272615 (2023) https://doi.org/10.1117/12.2685195

KEYWORDS: Laser damage threshold, Multilayers, Dielectric mirrors, Silica, Mirrors, Laser development, Sputter deposition, Spectroscopy, Scanning electron microscopy, Oxygen

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Proceedings Article | 24 November 2023 Presentation + Paper

Influence of the multilayer dielectric design on the laser damage resistance of pulse-compression gratings

Nadja Roquin, Lilian Heymans, Saaxewer Diop, Nicolas Bonod, Marine Chorel, Éric Lavastre, Pierre Brianceau, Laurent Gallais, Laurent Lamaignère

Proceedings Volume 12726, 1272607 (2023) https://doi.org/10.1117/12.2685304

KEYWORDS: Design and modelling, Laser induced damage, Resistance, Dielectrics, Optical gratings, Electric fields, Diffraction gratings, Laser damage threshold, Etching, Diffraction

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Proceedings Article | 12 October 2021 Presentation

Toward a design optimization’s method to increase the laser induced damage threshold of MLD mirrors and gratings used in sub-picosecond regime

Florian Tournemenne, Marine Chorel, Eric Lavastre, Laurent Lamaignère, Saaxewer Diop, Nicolas Bonod

Proceedings Volume 11910, 119100V (2021) https://doi.org/10.1117/12.2600628

KEYWORDS: Mirrors, Laser damage threshold, Optical design, Laser induced damage, Optics manufacturing, Resistance, Refractive index, Pulsed laser operation, Picosecond phenomena, Multilayers

Proceedings Article | 12 September 2021 Presentation

Minimization of electric field intensity in pillars of MLD gratings through the design of the planar dielectric multilayers

Saaxewer Diop, Nicolas Bonod, Laurent Gallais, Marine Chorel, Eric A. Lavastre, Laurent Lamaignère

Proceedings Volume 11872, 1187207 (2021) https://doi.org/10.1117/12.2598972

KEYWORDS: Dielectrics, Optical design, Laser induced damage, Diffraction, Laser damage threshold, Etching, Picosecond phenomena, Optical components, Mirrors, Laser therapeutics

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Multilayer dielectric gratings (MLDG) are key optical components of Petawatt-class laser that are used to compress short pulses of high intensities. Laser-induced damage can occur on the top area of the components, typically arising in the pillars periodically etched. This phenomenon limits the power yielded by high power laser facilities such as PETAL (PETwatt Aquitaine Laser) laser facility. PETAL is expected to delivery pulses with a wavelength around 1053 nm, an energy around 3 kJ and a pulse duration between 0.5 and 10 ps. Coupled with LMJ (Laser MegaJoule), PETAL aims to study materials in extreme conditions to reproduce the environment in the heart of stars or planets, fusion by inertial confinement, particularly rapid ignition and shock ignition, and nuclear physics for medical proton therapy. In this study, we present a process to improve the laser-induced damage threshold of PETAL pulse-compression gratings in sub-picosecond regime by reducing the electric field intensity in the pillars. PETAL gratings have specific parameters of operation: Transverse Electric polarization, under vacuum, a period equal to 1780 lines per mm and diffraction efficiency higher than 95% for the -1st order. Theoretical designs are calculated with a code developed at the Fresnel Institute. The code solves Fresnel equations by using the differential method, Fast Fourier Factorization (FFF) and S matrix propagation algorithm. As a result, we obtain the distribution of the electric field and diffraction efficiency of any given diffraction order. First, starting with a given MLD mirror, we calculate an etching profile that maximizes the diffraction efficiency at the -1st order by taking into account the manufacturing constraints of future suppliers. Then, we optimize the mirror stack without changing the etching profile. We modify only the first top layers under the grooves. We obtained theoretical designs with the same etching profile and identical diffraction efficiency, associated with different electric field intensity values and expected different laser induced damage thresholds.

SPIE Journal Paper | 21 November 2020 Open Access

Round-robin measurements of the laser-induced damage threshold with sub-picosecond pulses on optical single layers

Laurent Lamaignère, Alexandre Ollé, Marine Chorel, Nadja Roquin, Alexei Kozlov, Brittany Hoffman, James Oliver, Stavros Demos, Laurent Gallais, Raluca Negres, Andrius Melninkaitis

OE, Vol. 60, Issue 03, 031005, (November 2020) https://doi.org/10.1117/12.10.1117/1.OE.60.3.031005

KEYWORDS: Laser damage threshold, Hybrid fiber optics, Laser induced damage, Refractive index, Dielectrics, Optical engineering, Sensors, Environmental sensing, Diagnostics, Beam propagation method

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Proceedings Article | 3 December 2019 Presentation

Round-robin measurements of optical coatings laser-induced–damage threshold in the subpicosecond range (Conference Presentation)

Laurent Lamaignère, Alexandre Ollé, Marine Chorel, Nadja Roquin, Alexeï Kozlov, Brittany Hoffman, Stavros Demos, Laurent Gallais, Andrius Melninkaitis

Proceedings Volume 11173, 1117319 (2019) https://doi.org/10.1117/12.2536678

KEYWORDS: Laser damage threshold, Optical coatings, Optical testing, Laser optics, Standards development, Control systems, Optical components, High power lasers, Polarization, Environmental sensing

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