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Free-electron lasers (FELs)

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

... Introduction Free Electron Lasers (FELs) [ 1 , 2 ] deliver ultrashort, narrow-band and ultrabright pulses down to the hard x-ray range [ 3 – 5 ], enabling breakthrough experiments in chemical, ...

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Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers

Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers

... seeded free-electron lasers (FEL’s) have demonstrated to be very attractive sources for in- tense light production, revealing improved shot-to-shot stability, tunability, spatial quality and ...

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Chaotic particle dynamics in free electron lasers

Chaotic particle dynamics in free electron lasers

... Second, the effects of wiggler-induced betatron oscillations on the particle orbits were analyzed for a realizable helical-wiggler field configuration in the absence [r] ...

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Proposal for a Raman X-ray Free Electron Laser

Proposal for a Raman X-ray Free Electron Laser

... of electron velocity mismatch The energy dispersion of the incident electron bunch is a major concern for X-ray free electron ...for electron energies of few tens of MeV ...the ...

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Megahertz data collection from protein microcrystals at an X-ray free-electron laser

Megahertz data collection from protein microcrystals at an X-ray free-electron laser

... X-ray free-electron lasers (XFELs) enable novel experiments because of their high peak brilliance and femtosecond pulse duration. However, non-superconducting XFELs offer repetition rates of only 10 ...

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Modeling of the interaction of an x-ray free-electron laser with large finite samples

Modeling of the interaction of an x-ray free-electron laser with large finite samples

... I. INTRODUCTION X-ray free-electron lasers (XFELs) provide unprecedented high brilliance, good coherence and very short pulse duration in the X-ray regime. Their specifications have opened new ...

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X-ray amplification from a Raman Free Electron Laser

X-ray amplification from a Raman Free Electron Laser

... X-ray free electron lasers, based on substitu- tion of the LINAC by laser-wakefield acceleration [ 2 , 3 ], use of original compact undulators as an ion channel [ 4 ], or a counter-propagating laser ...

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Single-shot time-resolved magnetic x-ray absorption at a free-electron laser

Single-shot time-resolved magnetic x-ray absorption at a free-electron laser

... DOI: 10.1103/PhysRevB.99.144305 I. INTRODUCTION Femtosecond time-resolved experiments employing ad- vanced x-ray probe techniques have been realized in a wide variety of scientific domains since the advent of ultrashort ...

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Progress in Interband Cascade Lasers: From Edge Emitting Lasers to VCSELs

Progress in Interband Cascade Lasers: From Edge Emitting Lasers to VCSELs

... EDGE-EMITTING LASERS As a first step towards the fabrication of hybrid GaAs/GaSb IC-VCSELs, we started our investigations by ensuring that laser operation from large-area edge-emitting lasers could be ...

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Etude physique des lasers à semi conducteurs : cas des lasers à cascades quantiques

Etude physique des lasers à semi conducteurs : cas des lasers à cascades quantiques

... cascade lasers arises firstly from the reduction of population in the upper laser level due to the nonradiative relaxation and the escape of electrons by thermionic emission effect, and secondly, by the increase ...

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Matériaux lasers dopés à l'ion ytterbium : Performances lasers en pompage par diodes lasers et étude des propriétés thermo-optiques à des températures cryogéniques

Matériaux lasers dopés à l'ion ytterbium : Performances lasers en pompage par diodes lasers et étude des propriétés thermo-optiques à des températures cryogéniques

... diodes lasers émettant autour de 940 nm a relancé l’intérêt de l’utilisation de l’ion ytterbium comme ion ...applications lasers de forte ...matériaux lasers sont refroidis jusqu’à la température de ...

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High frequency dynamics in quantum cascade lasers : a roadmap to free-space communications in the mid-infrared

High frequency dynamics in quantum cascade lasers : a roadmap to free-space communications in the mid-infrared

... the free-running master QCL (in orange) operating at 250 K and 650 mA and of the free-running slave QCL (in cyan) operating at 278K and 450 mA; (b) experimental setup allowing one-way injection with the ...

3

Réduction du bruit dans les lasers : application aux lasers à semi-conducteur et aux minilasers solides

Réduction du bruit dans les lasers : application aux lasers à semi-conducteur et aux minilasers solides

... et qui correspondaient à la génération d’états quasi classiques du rayonnement. En effet cette nouvelle étape impliquait le recours à une approche quantique du rayon- nement et de l’émission laser, parce que les niveaux ...

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Depletion and diffraction of an electromagnetic wiggler field during the free electron laser interaction

Depletion and diffraction of an electromagnetic wiggler field during the free electron laser interaction

... An analysis of our self-consistent equations of motion shows, in fact, that the FEL-induced phase shift (which guides the optical wave) has little influence on the [r] ...

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Ab initio study of electron mean free paths and thermoelectric properties of lead telluride

Ab initio study of electron mean free paths and thermoelectric properties of lead telluride

... the electron-phonon interaction in n-type PbTe from first-principles calculation and obtain the electron- phonon scattering rates and electron mean free paths at dif- ferent ...mean ...

11

Visible-Light-Induced Metal-Free Trifluoromethylselenolation of Electron-Rich Heteroarenes Using the Nucleophilic Me4N][SeCF3] Reagent

Visible-Light-Induced Metal-Free Trifluoromethylselenolation of Electron-Rich Heteroarenes Using the Nucleophilic Me4N][SeCF3] Reagent

... the ·SeCF 3 radical could also be generated from a nucleophilic source of SeCF 3 via a visible-light-induced SET (Single Electron Transfer) oxidation. This fluorinated radical would then easily react with aromatic ...

6

Controlling molecules with lasers and lasers with molecules

Controlling molecules with lasers and lasers with molecules

... We created a molecular triplet state spatial light modulator (SLM) to be used both outside and inside the laser cavity for ultrafast pulse shaping. The SLM consist[r] ...

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Etude thermique des cristaux lasers, Réalisation de lasers à fibres monocristallines

Etude thermique des cristaux lasers, Réalisation de lasers à fibres monocristallines

... Difficulté de croissance par µPD facile difficile Tableau I.8.1 Comparaisons des cristaux candidats pour les fibres monocristallins. Comme on peut le voir, le Nd :YVO 4 présente certains avantages, en particulier une ...

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Progress in Interband Cascade Lasers: from edge emitting lasers to VCSELs

Progress in Interband Cascade Lasers: from edge emitting lasers to VCSELs

... ABSTRACT Mid-infrared lasers are crucial devices to enable optical spectroscopy in this spectral region of strategic importance for molecular sensing. In this presentation, we will review our recent progress in ...

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Ab initio study of plasmons and electron-phonon coupling in bismuth: from free-carrier absorption towards a new method for electron energy-loss spectroscopy

Ab initio study of plasmons and electron-phonon coupling in bismuth: from free-carrier absorption towards a new method for electron energy-loss spectroscopy

... 5.1 Structural and electronic properties In this section I will present a detailed analysis of the theoretical equilibrium lattice pa- rameters and Kohn-Sham band structure of bulk Bi. Special attention will be given to ...

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