LIL laser performance status

Julien, Xavier; Adolf, Alain; Bar, Emmanuel; Beau, V.; Bordenave, E.; Chies, T.; Courchinoux, Roger; Di-Nicola, Jean-Michel; Feral, Christophe; Gendeau, Patrick; Graillot, H.; Grosset-Grange, C.; Henry, Olivier; Higonenq, Vincent; Journot, Eric; Lacampagne, Lionel; Lafond, Eric; Déroff, L. Le; Martinez, Arnaud; Patissou, L.; Roques, A.; Thauvin, Ludovic; Thiell, G.

doi:10.1117/12.874466

Cited by 10 publications

(2 citation statements)

References 12 publications

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“…The LIL facility delivered 10 kJ total laser energy on target at 351 nm (3ω) wavelength [23]. In addition to continuous phase plate, two-phase modulators incorporated in the front-end laser temporally smoothed the beams.…”

Section: Methodsmentioning

confidence: 99%

Shock generation comparison with planar and hemispherical targets in shock ignition relevant experiment

et al. 2017

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We performed an experiment on the "Ligne d'Intégration Laser" facility to produce strong shocks with plasma conditions relevant for the Shock Ignition approach to Inertial Confinement Fusion. Two kinds of target have been used: planar and hemispherical. We observe an increase of the shock velocity in hemispherical geometry, which entails a fairly planar shock despite the Gaussian focal spot. Numerical results reproduce in the successful way the shock dynamics in the two cases, indicating, for laser intensities around 1.5×10 15 W/cm 2 at 3ω, an ablation pressure of (90 ± 20) Mbar and (120 ± 20) Mbar in planar and hemispherical geometry respectively. I.

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Section: Methodsmentioning

confidence: 99%

Shock generation comparison with planar and hemispherical targets in shock ignition relevant experiment

et al. 2017

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“…where λ is the wavelength, n 2 the nonlinear refractive index of optical materials, I the intensity of the laser beam, z the direction of propagation and L the cumulative length of optical materials along the beamline. Intense efforts have been made to reduce this B-integral; Namely, (i) using optical materials featuring small nonlinear susceptibilities, in particular fused silica optics in transmission 27 and low n 2 amplifier medium 28 , (ii) improving beam contrast by the use of spatial light modulators in front-end for global 6,[29][30][31] and local 5,32 corrections, (iii) understanding and limiting FM-to-AM (Frequency Modulation-to-Amplitude Modulation) conversion in laser beam lines to reduce temporal modulations [33][34][35][36][37] . The combination of the various conditions leading to the formation of filaments has been the topic of several contributions 38,39 and efforts are still underway to better control and push back the break-up threshold mainly through a better understanding of the impact of amplitude and phase perturbations 40,41 .…”

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confidence: 99%

Linear-to-circular polarization conversion with full-silica meta-optics to reduce nonlinear effects in high-energy lasers

Bonod,

Brianceau,

Daurios

et al. 2023

Nat Commun

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High-energy lasers have benefited from intense efforts to bring light-matter interactions to new standards and to achieve laser fusion ignition. One of the main issues to further increasing laser energy is the resistance of optical materials to high laser fluences, in particular at the final stage of the laser beamline where nonlinear Kerr effects can occur in optical materials and provoke laser filamentation. One promising way to mitigate this process is to reduce the nonlinear susceptibility of the material by switching the polarization from a linear to a circular state. Here, we report a significant reduction in the laser filamentation effect on glass by using a full-silica metamaterial waveplateable to switch the linear-to-circular polarization of high fluence laser beams. This result is achieved through the use of a large size full-silica meta-optics exhibiting nominal polarization conversion associated with an excellent transmission efficiency and wavefront quality, as well as a high laser damage resistance.

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LMJ/PETAL laser facility: Overview and opportunities for laboratory astrophysics

Casner

Caillaud

Darbon

et al. 2015

High Energy Density Physics

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LIL laser performance status

Cited by 10 publications

References 12 publications

Shock generation comparison with planar and hemispherical targets in shock ignition relevant experiment

Shock generation comparison with planar and hemispherical targets in shock ignition relevant experiment

Linear-to-circular polarization conversion with full-silica meta-optics to reduce nonlinear effects in high-energy lasers

LMJ/PETAL laser facility: Overview and opportunities for laboratory astrophysics

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