High-order harmonic generation using a high-repetition-rate turnkey laser.

E Lorek,D Zigmantas,E W Larsen,D Paleček,J Mauritsson,S Carlström,C M Heyl

doi:10.1063/1.4902819

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.

Highlights

IntroductionCoherent extreme ultra-violet (XUV) pulses, providing excellent temporal and spatial resolution, can be produced by a process called high-order harmonic generation (HHG)
Coherent extreme ultra-violet (XUV) pulses, providing excellent temporal and spatial resolution, can be produced by a process called high-order harmonic generation (HHG).1 The harmonic spectrum typically consists of odd harmonic orders of the driving field frequency that form a plateau extending over a large energy range up to high photon energies.2 By isolating a single harmonic order, high spatial resolution can be obtained.3 While an isolated harmonic order has a duration on the order of the driving field, the total harmonic spectrum corresponds to a train of pulses with hundreds of attoseconds in duration.4 By applying various temporal confinement schemes, isolated attosecond pulses can be obtained.5 These attosecond pulses have been fruitfully used, e.g., for studies of the motion of electrons on their natural timescale
In conclusion, we have demonstrated high-order harmonic generation using a high-repetition-rate turnkey laser

Summary

Introduction

Coherent extreme ultra-violet (XUV) pulses, providing excellent temporal and spatial resolution, can be produced by a process called high-order harmonic generation (HHG).. The harmonic spectrum typically consists of odd harmonic orders of the driving field frequency that form a plateau extending over a large energy range up to high photon energies.. By isolating a single harmonic order, high spatial resolution can be obtained.. While an isolated harmonic order has a duration on the order of the driving field, the total harmonic spectrum corresponds to a train of pulses with hundreds of attoseconds in duration.. By applying various temporal confinement schemes, isolated attosecond pulses can be obtained.. By applying various temporal confinement schemes, isolated attosecond pulses can be obtained.5 These attosecond pulses have been fruitfully used, e.g., for studies of the motion of electrons on their natural timescale.

Methods

Results

Conclusion