Large optics metrology for high-power lasers

Bouillet, Stéphane; Ameil, Christel; Beau, V.; Bonville, O.; Cavaro, Sandy; Courchinoux, Roger; Daurios, Jérôme; Donval, Thierry; Eupherte, Laure; Fréville, Sandrine; Gaborit, Gael; Lebeaux, Isabelle; Leymarie, Christophe; Parreault, Romain; Raze, Gerard; Roquin, Nadja; Lamaignère, Laurent

doi:10.1364/josaa.36.000c95

Cited by 16 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transmission efficiency of the waveplate is measured using a small beam single point scanning photometer capable of handling large size optical components up to 400 × 800 mm 2 58 . The laser scanning beam size is 8 mm at 98% of encircled energy.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Further details on damage testing set-up, procedure and uncertainty evaluation are available in refs. 58 , 64 , 65 .…”

Section: Methodsmentioning

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…Before its installation on LMJ facility and after its removal, the matrix of damage sites is observed on dedicated optical set-up [13]. The component is illuminated from the edge and the light scattered by damage sites is collected by the observation system on the same basic principle as the onsite system.…”

Section: Matrix Of Damage Sitesmentioning

confidence: 99%

“…The first one covers the whole component by sub-images to reconstitute a complete image with a resolution of ∼ 10 μm. The second one is a long front macroscope, motorized (zoom and focus) and coupled to a coaxial illumination, with a resolution of ∼ 2 μm by pixel [13]. This resolution allows for an accurate characterization of 165 defects or damage sites.…”

Section: Matrix Of Damage Sitesmentioning

confidence: 99%

LMJ 2023 facility status

Denis

Néauport²,

Blanchot³

et al. 2023

High Power Lasers for Fusion Research VII

View full text Add to dashboard Cite

The Laser Megajoule facility, developed by the CEA is based on 176 Nd:glass laser beams focused on a micro-target positioned inside a 10-meter diameter spherical chamber. The facility will deliver a total energy of 1.4MJ of UV light at 0.35 µm and a maximum power of 400 TW. A specific pétawatt beam, PETAL, offers a combination of a very high intensity beam, synchronized with the nanosecond beams of the LMJ. This combination allows expanding the LMJ experimental field in the High Energy Density Physics (HEDP) domain.Since September 2021, a major project milestone has been achieved with the commissioning of the half LMJ (88 beams are fully operational with 10 heating bundles of 8 beams and a specific bundle for plasma diagnostics purpose). The installation and the commissioning of new laser bundles and new plasma diagnostics around the target chamber are continuing, simultaneously to the realization of plasma experiments.Another project milestone has been achieved at the end of 2021, with a dedicated laser experiment in the facility to explore the Power-Energy Diagram.

show abstract

“…A high uniformity is evidenced, and the fast axis is oriented at +45 and -45° as expected. Transmission efficiency was measured on a large area scanning photometer in operating conditions [7]. Results are presented in Figure 3 for the two areas of the waveplate.…”

Section: Design Manufacturing and Optical Characterizationmentioning

confidence: 99%

Metamaterial quarter-wave plate UV transmission grating for high-energy laser beams

Néauport

Daurios

Brianceau

et al. 2023

High Power Lasers for Fusion Research VII

View full text Add to dashboard Cite

We investigate the feasibility of a full-silica transmission metasurface exhibiting optical properties equivalent to a quarterwave plate at the wavelength of 351 nm as an alternative to anisotropic crystals. We report the design, manufacturing process and optical characterization of full-silica quarter waveplates. We evidence the possibility to obtain a full-silica component exhibiting at 351 nm a high damage threshold and a phase retardance of /4 associated with a transmission efficiency higher than 95%. Such an optical component could offer a great alternative to birefringent materials for the manipulation of polarization of high-energy laser beams.

show abstract

Large optics metrology for high-power lasers

Cited by 16 publications

References 19 publications

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

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

LMJ 2023 facility status

Metamaterial quarter-wave plate UV transmission grating for high-energy laser beams

Contact Info

Product

Resources

About