Laser Challenges for Fast Ignition

Zuegel, J. D.; Borneis, S.; Barty, C. P. J.; LeGarrec, Bruno; Danson, C.; Miyanaga, Noriaki; Rambo, Patrick K.; Leblanc, Catherine; Kessler, T. J.; Schmid, Ansgar W.; Waxer, L. J.; Kelly, John; Kruschwitz, B. E.; Jungquist, R.; Moses, E. I.; Britten, Jerald A.; Jovanovic, Igor; Dawson, Jay W.; Blanchot, N.

doi:10.13182/fst06-a1161

Cited by 84 publications

(34 citation statements)

References 78 publications

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“…The chirped pulse amplification technique proposed by Strickland and Mourou in 1985 [5] paved the way for ultra-intense high-energy systems. Since then, laboratories have developed short-pulse high-power laser facilities all around the world [6]. While considering long-pulse or short-pulse high-power laser facilities, optical components performances and in particular laser damage are always factors limiting the overall system performances.…”

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confidence: 99%

Laser damage density measurement of optical components in the sub-picosecond regime

et al. 2015

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A rasterscan procedure adapted to the sub-picosecond regime is set to determine laser-induced damage densities as function of fluences. Density measurement is carried out on dielectric high-reflective coatings operating at 1053 nm. Whereas laser-induced damage is usually considered deterministic in this regime, damage events occur on these structures for fluences significantly lower than their intrinsic damage threshold. Scanning electron microscope observations of these "under-threshold" damage sites evidence ejections of defects, embedded in the dielectric stack. This method brings a new viewpoint for the qualification of optical components and their optimization for a high resistance in the sub-picosecond regime.

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confidence: 99%

Laser damage density measurement of optical components in the sub-picosecond regime

et al. 2015

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“…The Chirped Pulse Amplification (CPA) technique proposed by Strickland and Mourou in 1985 [5] paved the way for ultra-intense high energy systems. Since then, laboratories have developed short pulse high power laser facilities all around the world [6]. A petawatt laser is under development in Aquitaine region, France.…”

Section: Introductionmentioning

confidence: 99%

Sub-picosecond laser induced damage test facility for petawatt reflective optical components characterizations

Sozet

Néauport²,

Lavastre³

et al. 2015

SPIE Proceedings

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While considering long pulse or short pulse high power laser facilities, optical components performances and in particular laser damage resistance are always factors limiting the overall system performances. Consequently, getting a detailed knowledge of the behavior of these optical components under irradiations with large beam in short pulse range is of major importance. In this context, a Laser Induced Damage Threshold test facility called DERIC has been developed at the Commissariat à l'Energie Atomique et aux Energies Alternatives, Bordeaux. It uses an Amplitude Systemes laser source which delivers Gaussian pulses of 500 fs at 1053 nm. 1-on-1, S-on-1 and RasterScan test procedures are implemented to study the behavior of monolayer and multilayer dielectric coatings

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“…More and more experiments, such as demonstration of fast ignition, ultrahigh intensity science, plasma physics, radiography, and astrophysics, need multipetawatt, even exawatt, laser facility urgently [1][2][3][4][5][6]. Many efforts have been made to improve the laser intensity, especially on the aspects of the meter scale grating (multilayer dielectric grating and gold grating) [7,8] and the grating tiling [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Phase control requirements of high intensity laser beam combining

Gao

Zhu

et al. 2012

Appl. Opt.

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Aiming at getting the general requirements of the beam combine for ignition scale laser facilities, the analytical expressions including the factors affecting the combine results are derived. The physical meanings of every part are illustrated. Based on these expressions, the effects of the factors, including the beam configuration, piston error, and tip/tilt error, are studied analytically and numerically. The results show that the beam configuration cannot affect the Strehl ratio (SR) of the combined beam, but it influences the FWHM of the main peak and the ratio of the main peak and the side peak. The beam separation should be no more than 1.24 times the individual beam width for the multibeam combine, and be close to the individual beam width for the two-beam combine as much as possible. The piston error can change the characteristics of the combine beam focus, including the peak intensity, the focal spot morphology, the fractional energy contained within a certain area, and the center of mass. For the two-beam combine, a piston error less than 2π/5 rad is suitable, and for the multibeam combine, the standard deviation of the piston error should be no more than 2π/10 rad. The tip/tilt error has a great influence on the combined results. It affects the superposition degree of the focal spots of the combined elements directly. A requirement of 0.5~1 μrad for the standard deviation of the tip/tilt error is adequate.

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Laser Challenges for Fast Ignition

Cited by 84 publications

References 78 publications

Laser damage density measurement of optical components in the sub-picosecond regime

Laser damage density measurement of optical components in the sub-picosecond regime

Sub-picosecond laser induced damage test facility for petawatt reflective optical components characterizations

Phase control requirements of high intensity laser beam combining

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