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Shaped-pulse optimisation of coherent soft-x-rays
R. Bartels, S. Backus, E. Zeek +5
High-harmonic generation is one of the most extreme nonlinear-optical processes observed to date. By focusing an intense laser pulse into a gas, the light-atom interaction that occ…
Phase Matching of High-Order Harmonics in Hollow Waveguides
Charles G. Durfee, Andy R. Rundquist, Sterling Backus +3
We investigate the case of phase-matched high-harmonic generation in a gas-filled capillary waveguide, comparing in detail theory with experiment. We observe three different regime…
Generation of Spatially Coherent Light at Extreme Ultraviolet Wavelengths
Randy A. Bartels, Ariel Paul, Hans Green +7
We present spatial coherence measurements of extreme-ultraviolet light generated using the process of high-harmonic upconversion of a femtosecond laser. Using a phase-matched hollo…
Phase-Matched Generation of Coherent Soft-X-Rays
Andy Rundquist, Charles G. Durfee, Zenghu Chang +4
Phase-matched harmonic conversion of visible laser light into soft x-rays was demonstrated. The recently developed technique of guided-wave frequency conversion was used to upshift…
Ultrafast 1 MHz vacuum-ultraviolet source via highly cascaded harmonic generation in negative-curvature hollow-core fibers
David E. Couch, Daniel D. Hickstein, David G. Winters +7
Vacuum ultraviolet (VUV) light is critical for the study of molecules and materials, but the generation of femtosecond pulses in the VUV region at high repetition rates has proven…