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Power scaling of a high-repetition-rate enhancement cavity
A passive optical resonator is used to enhance the power of a pulsed 78 MHz repetition rate Yb laser providing 200 fs pulses. We find limitations relating to the achievable time-averaged and peak power,...
PublicationsOptimization and characterization of a highly-efficient diffraction nanograting for MHz XUV pulses
We designed, fabricated and characterized a nano-periodical highly-efficient blazed grating for extreme-ultraviolet (XUV) radiation. The grating was optimized by the rigorous coupled-wave analysis method...
PublicationsDegree of Dispersion of Polymeric Compounds Determined With Terahertz Time-Domain Spectroscopy
Terahertz spectroscopy has been presented as a new technique for analyzing the degree of dispersion of polymeric compounds. It is a contact-free and non-destructive technique that can also be used to monitor...
PublicationsTransverse mode tailoring in a quasi-imaging high-finesse femtosecond enhancement cavity
We demonstrate a high-finesse femtosecond enhancement cavity with an on-axis obstacle. By inserting a wire with a width of 5% of the fun-damental mode diameter, the finesse of F = 3400 is only slightly...
PublicationsLarge-mode enhancement cavities
In passive enhancement cavities the achievable power level is limited by mirror damage. Here, we address the design of robust optical resonators with large spot sizes on all mirrors, a measure that promises...
PublicationsVacuum 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...
PublicationsLow-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...
PublicationsCompact 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...
PublicationsCavity-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...
PublicationsLaser-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...
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