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

Lorek, Eleonora; Larsen, Esben W.; Heyl, Christoph M.; Carlström, Stefanos; Paleček, David; Zigmantas, Donatas; Mauritsson, Johan

doi:10.1063/1.4902819

Cited by 47 publications

(27 citation statements)

References 44 publications

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“…The HH spectra were recorded for 106 positions of the pulse compressor grating, see figure 1. A more detailed description of the setup can be found in [27].…”

Section: Experimental Methodsmentioning

confidence: 99%

Spatially and spectrally resolved quantum path interference with chirped driving pulses

et al. 2016

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We measure spectrally and spatially resolved high-order harmonics generated in argon using chirped multi-cycle laser pulses. Using a stable, high-repetition rate laser we observe detailed interference structures in the far-field. The structures are of two kinds; off-axis interference from the long trajectory only and on-axis interference including the short and long trajectories. The former is readily visible in the far-field spectrum, modulating both the spectral and spatial profile. To access the latter, we vary the chirp of the fundamental, imparting different phases on the different trajectories, thereby changing their relative phase. Using this method together with an analytical model, we are able to explain the on-axis behaviour and access the dipole phase parameters for the short (a s ) and long (a l ) trajectories. The extracted results compare very well with phase parameters calculated by solving the time-dependent Schrödinger equation. Going beyond the analytical model, we are also able to successfully reproduce the off-axis interference structure.

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“…The HH spectra were recorded for 106 positions of the pulse compressor grating, see figure 1. A more detailed description of the setup can be found in [27].…”

Section: Experimental Methodsmentioning

confidence: 99%

Spatially and spectrally resolved quantum path interference with chirped driving pulses

et al. 2016

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“…Many applications in attosecond science should benefit from attosecond sources operating at higher repetition rates, i.e. in the MHz range [22,[28][29][30][31][32]. Examples of such applications are coincidence detection of two or more particles, which require a low number of events per laser shot [33], but a large number of events per second to build up statistics, photoelectron spectroscopy and microscopy in solids and on solid surfaces [34,35] where space charge effects can be a serious obstacle.…”

Section: Discussionmentioning

confidence: 99%

Carrier-envelope phase dependent high-order harmonic generation with a high-repetition rate OPCPA-system

et al. 2015

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Abstract. We study high-order harmonic generation with a high-repetition rate (200 kHz), few-cycle, driving laser, based on optical parametric chirped pulse amplification. The system delivers carrier-envelope phase stable, 8 fs, 10 μJ pulses at a central wavelength of 890 nm. High-order harmonics, generated in a high-pressure Ar gas jet, exhibit a strong CEP-dependence over a large spectral range owing to excellent stability of the driving laser pulses. This range can be divided into three spectral regions with distinct CEP influence. The observed spectral interference structures are explained by an analytical model based upon multiple pulse interferences.

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“…The majority of recent HHG experiments have been performed with Ti:Sa laser systems that are able to deliver short (<30 fs) energetic pulses (few millijoules) at repetition rates limited to a few kilohertz, corresponding to average powers about 10 W. However, there is currently considerable technological and research effort toward efficient HHG setups compatible with emerging laser systems [9] that are scalable to higher average powers, and typically operate at much higher repetition rate (≥100 kHz) and lower energy per pulse. In particular, ytterbium-doped fiber-based amplifier (YDFA) sources have allowed unprecedented XUV photon fluxes [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Spatio-spectral structures in high harmonic generation driven by tightly focused high repetition rate lasers

et al. 2018

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We investigate the spatio-spectral properties of extreme ultraviolet (XUV) high harmonic radiation driven by high repetition rate femtosecond laser systems. In the spatio-spectral domain, ring-shaped structures at each harmonic order associated with long-trajectory electrons are found to form arrow-shaped structures at the cutoff. These structures are observed with two different laser systems: an optical parametric chirped-pulse amplifier system at a central wavelength of 1.55 μm and 125 kHz repetition rate, and a temporally compressed femtosecond ytterbium fiber amplifier at 1.03 μm wavelength and 100 kHz repetition rate. As recently pointed out, the observed structures are well explained by considering the space-time atomic dipole-induced phase for short and long electron trajectories in the generation plane. The tighter focusing geometry and longer wavelength associated with these emerging driving laser systems increase the ring-like divergence and spectral broadening for high harmonics. Cutoff energies and photon fluxes obtained in argon and neon are also reported. Overall, these results shed new light on the properties of XUV radiation driven by these recently developed high average power laser systems, paving the way to high photon-flux XUV beamlines.

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

Cited by 47 publications

References 44 publications

Spatially and spectrally resolved quantum path interference with chirped driving pulses

Spatially and spectrally resolved quantum path interference with chirped driving pulses

Carrier-envelope phase dependent high-order harmonic generation with a high-repetition rate OPCPA-system

Spatio-spectral structures in high harmonic generation driven by tightly focused high repetition rate lasers

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