Multi-pass-cell-based nonlinear pulse compression to 115 fs at 75 µJ pulse energy and 300 W average power

Weitenberg, Johannes; Vernaleken, Andreas; Schulte, Jan; Ozawa, A.; Sartorius, Thomas; Pervak, Vladimir; Hoffmann, Hans-Dieter; Udem, Thomas; Rußbüldt, P.; Hänsch, Theodor W.

doi:10.1364/oe.25.020502

Cited by 115 publications

(80 citation statements)

References 16 publications

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“…5, it is still not showing very clear signs of couplings in intensity. To quantify this assertion, the mean spectral overlap factor V [21] is 97% even at this extreme nonlinearity level. The mechanism for the observed beam instability is not clearly understood, but might be due to the fact that small initial fluctuations in intensity are transferred to changes in the beam propagation through the large amount of Kerr spatial phase.…”

Section: Measurement Of Intensity and Phase Spatio-spectral Profilesmentioning

confidence: 99%

Multipass cells: 1D numerical model and investigation of spatio-spectral couplings at high nonlinearity

et al. 2020

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Multipass cells (MPC) are used nowadays as nonlinear tools to perform spectral broadening and temporal manipulation of laser pulses while maintaining a good spatial quality and spatio-spectral homogeneity. However, intensive 3D nonlinear spatio-temporal simulations are required to fully capture the physics associated to pulse propagation inside these systems. In addition, the limitations of such scheme are still under investigation. In this study, we first establish a 1D model as a useful design tool to predict the temporal and spectral properties of the output pulse for nearly Gaussian beams, in a wide range of cavity configurations and nonlinearity levels. This model allows to drastically reduce the computation time associated to MPC design. The validity of the 1D model is first checked by comparing it to 3D simulations. The results of the 1D model are then compared with experimental data collected from a near concentric gas-filled multipass cell presenting a high level of nonlinearity, enabling the observation of wavebreaking. In a second part, we experimentally characterize the spatio-spectral profile at the output of this experimental setup, both with an imaging spectrometer and with a complete 3D characterization method known as INSIGHT. The results show that gas-filled multipass cells can be used at peak power levels close to the critical power without inducing significant spatio-spectral couplings in intensity or phase.

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Section: Measurement Of Intensity and Phase Spatio-spectral Profilesmentioning

confidence: 99%

Multipass cells: 1D numerical model and investigation of spatio-spectral couplings at high nonlinearity

et al. 2020

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“…However, to date state-of-the-art HHG sources with a combination of high photon energies and high repetition rates still remain an open challenge. Figure 10 shows the principle of JuSPARC_SIRIUS combined with the recent newly developed highpower ultrafast laser system that exploits the novel inventions of the innoslab fs-ampli er (Russbueldt et al, 2015) and nonlinear pulse compression (Weitenberg et al, 2017) to accomplish ultrashort laser pulses (100 fs), large average-power (500 W), and a high repetition-rate (10 MHz). The main parameters of the JuSPARC_SIRIUS laser system are listed in Table 3.…”

Section: Laser System and Xuv Photon Generationmentioning

confidence: 99%

“…The main parameters of the JuSPARC_SIRIUS laser system are listed in Table 3. This high-power laser is placed in a localized clean room established by multi-stage air lter systems with a low-turbulence and laminar air ow to Figure 10: Schematic setup of JuSPARC_SIRIUS for spin-and time-resolved electron momentum microscopy, which consist of Innoslab ampli er (shaded yellow region) (Russbueldt et al, 2015), nonlinear compression using multi-pass cell (Weitenberg et al, 2017) Higher-harmonics generation (HHG) Experimental technique Photon-in / electron-out (spin-resolved detection of photoelectrons) Table 3: Main parameters of JuSPARC_SIRIUS create a particle-free environment, as shown in Figure 11. This advanced laser system will make it possible to push towards XUV photon energies exceeding 100 eV.…”

Section: Laser System and Xuv Photon Generationmentioning

confidence: 99%

JuSPARC - The Jülich Short-Pulsed Particle and Radiation Center

Büscher

Adam

Tusche

et al. 2020

JLSRF

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JuSPARC, the Jülich Short-Pulsed Particle and Radiation Center, is a laser-driven facility to enable research with short-pulsed photon and particle beams to be performed at the Forschungszentrum Jülich. The conceptual design of JuSPARC is determined by a set of state-of-the-art time-resolved instruments, which are designed to address the electronic, spin, and structural states of matter and their dynamic behaviour. From these instruments and experiments JuSPARC derives the need of operating several dedicated high pulse-power laser systems at highest possible repetition rates. They serve as core units for optimized photon up-conversion techniques generating the light pulses for the respective experiments. The applications also include experiments with spin polarized particle beams, which require the use of laser-based polarized gas targets. Thus, in its rst stage JuSPARC comprises four driving laser systems, called JuSPARC_VEGA, JuSPARC_DENEB, JuSPARC_SIRIUS and JuSPARC_MIRA, which are outlined in this article.

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“…This technique can be considered as an extension of multi-plate setups [17][18][19] with a distribution of the nonlinearity over tens of passes in the material instead of few, inducing a better output spatial quality and allowing higher compression factors. Compared to capillaries, this technique provides several additional degrees of freedom in terms of geometry, nonlinear material used (solid [15,20] or gas [21,22]), and spectral phase control through the mirror coatings. The most obvious improvement is that, using commercially available mirrors, the transmission of the cell is above 90% in all reported demonstrations.…”

Section: Rationalementioning

confidence: 99%

High-power two-cycle ultrafast source based on hybrid nonlinear compression

Lavenu¹,

Natile²,

Guichard³

et al. 2019

Opt. Express

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We demonstrate a hybrid dual-stage nonlinear compression scheme, which allows the temporal compression of 330 fs-pulses down to 6.8 fs-pulses, with an overall transmission of 61%. This high transmission is obtained by using a first compression stage based on a gasfilled multipass cell, and a second stage based on a large-core gas-filled capillary. The source output is fully characterized in terms of spectral, temporal, spatial, and short-and long-term stability properties. The system's compactness, stability, and high average power makes it ideally suited to drive high photon flux XUV sources through high harmonic generation. IntroductionFew-cycle laser sources are the subject of intense research efforts worldwide since they allow efficient high-harmonic generation (HHG) and the emission of isolated attosecond pulses. This results in compact and highly coherent radiation sources in the extreme ultraviolet (XUV) and soft X-ray ranges, with a rapidly increasing number of scientific and industrial applications such as ultrafast spectroscopy, nanoscale imaging, and attosecond science [1-3]. Laser sources based on titanium-doped sapphire (Ti:Sa) have, for a long time, been almost exclusively used to drive the HHG process and to pioneer attosecond physics. The pulse duration typically available from such lasers is 25 fs, so that a single stage of nonlinear compression in a gas-filled capillary result in few-cycle pulses [4]. Despite extraordinary material properties such as gain bandwidth and thermal conductivity, Ti:Sa systems suffer from the short upper state lifetime, their large quantum defect and the fact that they must be pumped with high brightness green lasers. This limits the efficiency, output average power, and prevents repetition rate scaling to drive strong field physics experiments.Laser physicists have been working on more efficient and power scalable ultrafast sources for strong field physics for over a decade. In particular, optical parametric chirped pulse amplifier systems appear as a particularly promising solution [5,6], since they can deliver extremely short pulses in various wavelength ranges and are less impacted by thermal effects because they are based on a non-resonant nonlinear process. However, in order to obtain good spatial and temporal quality, the energy transfer from the pump to the signal is around 10%, so that the pump laser energy must be scaled accordingly, with stringent requirements in terms of spatial and temporal quality.Currently, the most mature and powerful ultrafast source technology is undoubtedly ytterbium-based systems, with average power levels beyond 1 kW [7-9] and numerous industrial applications. These lasers have been used to drive the HHG process as early as 2009 [10], but the long pulse duration delivered by these sources (300 fs -2 ps) limits their relevance to this application field. Therefore, nonlinear compression setups have been used successfully to reduce the pulse duration and obtain XUV photon flux among the highest ever reported for HHG-based sources [11...

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Multi-pass-cell-based nonlinear pulse compression to 115 fs at 75 µJ pulse energy and 300 W average power

Cited by 115 publications

References 16 publications

Multipass cells: 1D numerical model and investigation of spatio-spectral couplings at high nonlinearity

Multipass cells: 1D numerical model and investigation of spatio-spectral couplings at high nonlinearity

JuSPARC - The Jülich Short-Pulsed Particle and Radiation Center

High-power two-cycle ultrafast source based on hybrid nonlinear compression

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