Concept

Amplification par dérive de fréquence

Publications associées (206)

Exciting Wide NMR Spectra of Static Solid Samples with Weak Radiofrequency Fields

Geoffrey Bodenhausen, Diego Carnevale, Srinivas Chinthalapalli

Trains of short pulses in the manner of `delays alternating with nutations for tailored excitation' (DANTE) have been applied to the Pake patterns of protons of water molecules trapped in a static powdered sample of barium chlorate monohydrate. The spin dy ...

Walter De Gruyter Gmbh2017

Multi-mJ infrared femtosecond hydrogen Raman laser

Christoph Peter Hauri, Mostafa Shalaby

High-energy pulses at 1.28 mu m are demonstrated by stimulated Raman scattering in hydrogen using two chirped pulses of a Ti: Sapphire laser. The Stokes pulse carrying record-high energy of 4.4 mJ is recompressed to 80 fs. ...

Ieee2016

High-energy femtosecond hydrogen Raman laser

Christoph Peter Hauri, Mostafa Shalaby

High-energy pulses at 1.28 mu m are demonstrated by stimulated Raman scattering using two chirped pulses of a Ti:Sapphire laser in hydrogen. The Stokes pulse carrying record-high energy of 4.4 mJ is recompressed to 80 fs. ...

Ieee2016

Intense THz source based on BNA organic crystal pumped at Ti:sapphire wavelength

Christoph Peter Hauri, Mostafa Shalaby

We report on high-energy terahertz pulses by optical rectification (OR) in the organic crystal N-benzyl-2-methyl-4-nitroaniline (BNA) directly pumped by a conventional Ti:sapphire amplifier. The simple scheme provides an optical-to-terahertz conversion eff ...

Optical Soc Amer2016

High-power femtosecond Raman frequency shifter

Christoph Peter Hauri, Mostafa Shalaby

We report on the generation of broadband, high-energy femtosecond pulses centered at 1.28 mu m by stimulated Raman scattering in a pressurized hydrogen cell. Stimulated Raman scattering is performed by two chirped and delayed pulses originating from a mult ...

Optical Soc Amer2016

Intense THz source based on BNA organic crystal pumped at conventional Ti:Sapphire wavelength

Christoph Peter Hauri, Mostafa Shalaby

We report on high-energy terahertz pulses by optical rectification (OR) in the organic crystal N-benzyl-2-methyl-4-nitroaniline (BNA) directly pumped by a conventional Ti: sapphire amplifier. The simple scheme provides an optical-to-terahertz conversion ef ...

Ieee2016

Electron beam dynamics in an ultrafast transmission electron microscope with Wehnelt electrode

High temporal resolution transmission electron microscopy techniques have shown significant progress in recent years. Using photoelectron pulses induced by ultrashort laser pulses on the cathode, these methods can probe ultrafast materials processes and ha ...

Elsevier Science Bv2016

Versatile High Repetition Rate 2-μm Pulsed Source Based on Wideband Parametric Conversion

Camille Sophie Brès, Adrien Billat, Steevy Joyce Cordette

We report an all-fiber pulsed source based on parametric conversion followed by thulium amplification able to deliver picosecond pulses at a repetition rate selectable between 2 and 5 GHz, of which central wavelength can be freely selected in the 2-μm regi ...

2016

Beyond Vibrationally Mediated Electron Transfer: Coherent Phenomena Induced by Ultrafast Charge Separation

Jacques-Edouard Moser

Wave packet propagation succeeding electron transfer (ET) from alizarin dye molecules into the nanocrystalline TiO2 semiconductor has been studied by ultrafast transient absorption spectroscopy. Because of the ultrafast time scale of the ET reaction of abo ...

American Chemical Society2016

Femtosecond pulse length and arrival time measurement of hard X-Ray FELs

Ishkhan Gorgisyan

The ultra-bright short-pulsed radiation provided by the free electron lasers (FEL) is used for many new discoveries in different fields of science and industry. The advancement of the FEL technologies allows the generation of shorter photon pulses with hig ...

EPFL2016

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