High-order harmonic generation at a repetition rate of 100 kHz

Lindner, Fabrizio; Stremme, Wolfgang; Schätzel, Michael G.; Grasbon, F.; Paulus, G. G.; Walther, H.; Hartmann, R.; Strüder, L.

doi:10.1103/physreva.68.013814

Cited by 94 publications

(56 citation statements)

References 31 publications

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“…Obtenir des intensités de l'ordre de 10 14 W/cm 2 Dans ces conditions de forte focalisation où le faisceau fondamental est très divergent après le foyer, les harmoniques émises sont elles aussi très divergentes et donc difficiles à caractériser. De plus, la puissance moyenne du fondamental étant très élevée, il est facile de brûler les optiques réflectives utilisées pour l'XUV avec le faisceau IR.…”

Section: Génération Et Détection Des Harmoniques D'ordres éLevésunclassified

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Génération d’harmoniques d’ordres élevés à ultra haute cadence

Constant

Boullet

Petit

et al. 2011

UVX 2010 - 10e Colloque Sur Les Sources Cohérentes Et Incohérentes UV, VUV Et X ; Applications Et Développements Récents

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Résumé. Dans cet article, nous présentons nos résultats concernant la génération d'harmoniques d'ordres élevés obtenus avec de très hauts taux de répétition accordables entre 100 kHz et 1 MHz. Le système laser utilisé, développé au CELIA, est un système laser compact, pompé diode et utilisant des fibres microstructures à double coeur dopées Ytterbium. L'ensemble de génération et détection d'harmoniques d'ordre élevés est lui aussi compact et nous a permis de détecter des harmoniques dans plusieurs gaz (Argon, Krypton et Xénon) à des cadences jamais obtenues auparavant avec un système laser.

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Section: Génération Et Détection Des Harmoniques D'ordres éLevésunclassified

“…Les lasers Titane Saphir délivrant des puissances moyennes de l'ordre du Watt, les taux de répétition utiles sont donc de l'ordre du kHz [2] ou moins.…”

Section: Introductionunclassified

Génération d’harmoniques d’ordres élevés à ultra haute cadence

Constant

Boullet

Petit

et al. 2011

UVX 2010 - 10e Colloque Sur Les Sources Cohérentes Et Incohérentes UV, VUV Et X ; Applications Et Développements Récents

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“…Two of those paths, generally referred to as the short and long trajectory, contribute the most to the HHG signal. For large fields, the atomic phase (and therefore the generated harmonics) depends nearly linearly on intensity and, therefore, also on the pondoromotive energy via θ = −ηU p (29) Lindner et al (2003) have given an example for 25th harmonic generation in argon, where the calculated values are θ = −0.11U p rad eV −1 for the short quantum path and θ = −3.9U p rad eV −1 for the long path. For typical HHG conditions, this can lead to a phase variation, ranging from a few radians for the short path to tens of radians for the long path.…”

Section: Upconversion Of Frequency Comb Lasersmentioning

confidence: 99%

“…This can be calculated via the so-called quasi-classical action S acquired by the electron in the three-step harmonic generation process, as explained in Section 2.10. According to Lewenstein et al (1995), Kan et al (1995), and Lindner et al (2003), the action is equal to…”

Section: Upconversion Of Frequency Comb Lasersmentioning

confidence: 99%

Precision Laser Spectroscopy in the Extreme Ultraviolet

Eikema

Ubachs

2011

Handbook of High‐resolution Spectroscopy

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Techniques for the production of short wavelengths in the extreme ultraviolet wavelength range are described, spanning low‐order harmonic generation in the perturbative regime for narrow bandwidth XUV production to the plateau‐regime with the three‐step collisional model for the generation of high harmonics with broadband ultrafast pulses. In addition, the intermediate regime is discussed for pulses of 300 ps duration, as well as the regime of harmonic conversion based on continuous wave lasers aiming at the production of coherent Lyman‐α radiation. Applications of XUV sources in the frequency domain typically rely on the production of XUV‐light from narrowband Fourier‐transform‐limited pulses for recording high‐resolution spectra. Alternatively, harmonically upconverted pulses of ultrashort duration (with inter‐pulse coherence) can be used for spectroscopic studies in the time and frequency domain (such as direct frequency comb spectroscopy techniques). Examples of both approaches for atomic and molecular spectroscopy are discussed at some length. For precision metrology on atomic systems, a focus is put on the Lamb shift determination in the He ground state. In the realm of molecular spectroscopy, predissociation phenomena in the nitrogen molecule are highlighted, with relevance for dissociation processes occurring in the upper layers of the Earth atmosphere. Similar predissociation phenomena in carbon monoxide are also treated in some detail, in this case with relevance for the chemistry in interstellar clouds. Precision XUV spectroscopy of molecular hydrogen is discussed as well, as it relates to the possibility of detecting a variation of the proton–electron mass ratio on a cosmological time scale. In the last section, applications of direct frequency comb spectroscopic techniques at short wavelengths are explained and prospects are given for using these techniques at extreme ultraviolet wavelengths.

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“…Conventional HHG experiments are driven by amplified laser systems at a repetition rate of several kilohertz [1][2][3]. As a consequence, the statistics of measurements are limited to a few thousand events per second and a long acquisition time is required for applications in photoelectron-based spectroscopy and microscopy [4][5][6][7] (Fig.…”

Section: Introductionmentioning

confidence: 99%