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Vacuum ultraviolet frequency combs generated by a femtosecond enhancement cavity in the visible
We present the first (to our best knowledge) femtosecond enhancement cavity in the visible wavelength range for ultraviolet frequency comb generation. The cavity is seeded at 518 nm by a frequency-doubled...
PublikationenLow-loss VIS/IR-XUV beam splitter for high-power applications
We present a low-loss VIS/IR-XUV beam splitter, suitable for high-power operation. The spatial separation of the VIS/IR and XUV components of a beam is achieved by the wedged top layer of a dielectric...
PublikationenCompact high-repetition-rate source of coherent 100 eV radiation
Coherently enhancing laser pulses in a passive cavity provides ideal conditions for high-order harmonic generation in a gas, with repetition rates around 100 MHz (refs 1–3). Recently, extreme-ultraviolet...
PublikationenCavity-Enhanced High-Harmonic Generation with Spatially Tailored Driving Fields
We theoretically and experimentally investigate high-harmonic generation in a 78-MHz enhancement cavity with a transverse mode having on-axis intensity maxima at the focus and minima at an opening in the...
PublikationenLaser-manufactured mirrors for geometrical output coupling of intracavity-generated high harmonics
We demonstrate micro structuring of fused-silica laser mirror substrates by Inverse Laser Drilling. Slits of a width down to ~80 μm and circular holes with diameters down to ~50 μm have been structured...
PublikationenHigh-power sub-two-cycle mid-infrared pulses at 100 MHz repetition rate
Powerful coherent light with a spectrum spanning the mid-infrared (MIR) spectral range is crucial for a number of applications in natural as well as life sciences, but so far has only been available from...
PublikationenAcousto-optic pulse picking scheme with carrierfrequency-to-pulse-repetition-rate synchronization
We introduce and experimentally validate a pulse picking technique based on a travelling-wave-type acousto-optic modulator (AOM) having the AOM carrier frequency synchronized to the repetition rate of...
PublikationenFemtosecond Enhancement Cavities in the Nonlinear Regime
We combine high-finesse optical resonators and spatial-spectral interferometry to a highly phasesensitive investigation technique for nonlinear light-matter interactions. We experimentally validate an...
PublikationenEnhancement cavities for zero-offset-frequency pulse trains
The optimal enhancement of broadband optical pulses in a passive resonator requires a seeding pulse train with a specific carrier-envelope-offset frequency. Here, we control the phase of the cavity mirrors...
PublikationenBalancing of thermal lenses in enhancement cavities with transmissive elements
Thermal lensing poses a serious challenge for the power scaling of enhancement cavities, in particular when these contain transmissive elements. We demonstrate the compensation of the lensing induced by...
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