High-energy few-cycle Yb-doped fiber amplifier source based on a single nonlinear compression stage

Lavenu, Loïc; Natile, Michele; Guichard, Florent; Zaouter, Yoann; Hanna, Marc; Mottay, Eric; Georges, Patrick

doi:10.1364/oe.25.007530

Cited by 51 publications

(28 citation statements)

References 18 publications

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“…The second source is also based on a commercial high-energy femtosecond ytterbium-doped fiber amplifier (Amplitude Systemes Tangerine), but the beam at λ 1.03 μm is directly used to perform HHG. However, since shorter pulse durations allow overall better HHG performance, special care has been taken to counteract gain narrowing, allowing the generation of 150 fs pulses at the output of the laser [24]. These pulses are sent to a temporal compression stage that consists of a xenon-filled capillary inducing self-phase modulation followed by chirped mirrors.…”

Section: B Temporally Compressed Ydfa System At λ 103 μMmentioning

confidence: 99%

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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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Section: B Temporally Compressed Ydfa System At λ 103 μMmentioning

confidence: 99%

“…This compression stage can be entirely bypassed to drive the HHG with 150 fs pulses, or used with various Xe pressures and number of bounces on the chirped mirrors to provide tunable pulse duration at the output, from 16 fs to 30 fs in this work. More information on this source can be found in [24].…”

Section: B Temporally Compressed Ydfa System At λ 103 μMmentioning

confidence: 99%

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

et al. 2018

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“…YDFA systems often exhibit close-to-perfect spatial quality, so that the losses are dominated by the capillary losses. Experimentally obtained transmission factors for such setups at the output of YDFA are in the range of 60% (single stage) to 30% (dual-stage) [12,14].…”

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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“…Currently, great effort is therefore being invested in the compression of few-100 µJ fiber laser pulses at high average power levels by conventional 1-m long hollow-core fibers (HCF) [8][9][10][11]. For example, sub-300 fs pulses could be shortened to the duration of sub-two optical cycles at 216 W average power by using a cascaded HCF arrangement [12,13].…”

Section: Introductionmentioning

confidence: 99%

Compression of picosecond pulses from a thin-disk laser to 30fs at 4W average power

et al. 2018

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We investigate two approaches for the spectral broadening and compression of 1-ps long pulses of a thin-disk laser amplifier running at 50 kHz repetition rate at 1030 nm wavelength. We find that with a single, 2.66-m long stretched flexible hollow fiber filled with xenon gas, Fourier transform limited output pulse duration of 66 fs can be directly reached. For larger pulse shortening, we applied a hybrid cascaded approach involving a BBO-based pre-compressor and a long hollow fiber. We could achieve 33-times temporal shortening of 1-ps pulses down to a duration of 30 fs at an overall efficiency of ~29% with an output power level of 3.7 W. These results demonstrate the potential of stretched flexible fibers with their free length scalability for shortening laser pulses of moderate peak power.

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High-energy few-cycle Yb-doped fiber amplifier source based on a single nonlinear compression stage

Cited by 51 publications

References 18 publications

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

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

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

Compression of picosecond pulses from a thin-disk laser to 30fs at 4W average power

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