title: High-order harmonic generation using a high-repetition-rate turnkey laser.
abstract: We generate high-order harmonics at high pulse repetition rates using a turnkey laser. High-order harmonics at 400 kHz are observed when argon is used as target gas. In neon, we achieve generation of photons with energies exceeding 90 eV (∼13 nm) at 20 kHz. We measure a photon flux of up to 4.4 × 10(10) photons per second per harmonic in argon at 100 kHz. Many experiments employing high-order harmonics would benefit from higher repetition rates, and the user-friendly operation opens up for applications of coherent extreme ultra-violet pulses in new research areas.
authors.affiliation: Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden.
authors.forename: E
authors.initials: E
authors.lastname: Lorek
authors.affiliation: Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden.
authors.forename: E W
authors.initials: EW
authors.lastname: Larsen
authors.affiliation: Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden.
authors.forename: C M
authors.initials: CM
authors.lastname: Heyl
authors.affiliation: Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Carlström
authors.affiliation: Department of Chemical Physics, Lund University, Box 124, 221 00 Lund, Sweden.
authors.forename: D
authors.initials: D
authors.lastname: Paleček
authors.affiliation: Department of Chemical Physics, Lund University, Box 124, 221 00 Lund, Sweden.
authors.forename: D
authors.initials: D
authors.lastname: Zigmantas
authors.affiliation: Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden.
authors.forename: J
authors.initials: J
authors.lastname: Mauritsson