Intense infrared lasers for strong-field science

Advances in Optics and Photonics, Journal Year: 2022, Volume and Issue: 14(4), P. 652 - 652

Published: Aug. 31, 2022

The advent of chirped-pulse amplification in the 1980s and femtosecond Ti:sapphire lasers 1990s enabled transformative advances intense laser–matter interaction physics. Whereas most experiments have been conducted limited near-infrared range 0.8–1 μm, theories predict that many physical phenomena such as high harmonic generation gases favor long laser wavelengths terms extending high-energy cutoff. Significant progress has made developing few-cycle, carrier-envelope phase-stabilized, high-peak-power 1.6–2 μm laid foundation for attosecond X ray sources water window. Even longer wavelength are becoming available suitable to study light filamentation, generation, laser–plasma relativistic regime. Long-wavelength sub-bandgap strong-field excitation a wide solid materials, including semiconductors. In limit, bulk crystals also produce high-order harmonics. this review, we first introduce several important scaling laws physics, then describe recent breakthroughs short- (1.4–3 μm), mid- (3–8 long-wave (8–15 μm) infrared technology, finally provide examples applications these novel lasers. Some broadband ultrafast will profound effects on medicine, environmental protection, national defense, because their cover absorption band, molecular fingerprint region, well atmospheric transparent

Language: Английский

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Mode-locked dysprosium fiber laser: Picosecond pulse generation from 2.97 to 3.30 μm

APL Photonics, Journal Year: 2018, Volume and Issue: 3(11)

Published: Nov. 1, 2018

Mode-locked fiber laser technology to date has been limited sub-3 μm wavelengths despite significant application-driven demand for compact picosecond and femtosecond pulse sources at longer wavelengths. Erbium-doped holmium-doped fluoride lasers incorporating a saturable absorber are emerging as promising 2.7–2.9 μm, yet it remains major challenge extend this coverage. Here, we propose new approach using dysprosium-doped with frequency shifted feedback (FSF). Using simple linear cavity an acousto-optic tunable filter, generate ∼33 ps pulses up 2.7 nJ energy 330 nm tunability from 2.97 3.30 (∼3000–3400 cm−1)—the first mode-locked cover spectral region the most broadly pulsed date. Numerical simulations show excellent agreement experiments also offer insights into underlying dynamics of FSF generation. This highlights remarkable potential both dysprosium gain material versatile generation, opening opportunities mid-IR development practical applications outside laboratory.

Language: Английский

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Table-top high-energy 7 μm OPCPA and 260 mJ Ho:YLF pump laser

Optics Letters, Journal Year: 2019, Volume and Issue: 44(13), P. 3194 - 3194

Published: June 14, 2019

We present a state-of-the-art compact high-energy mid-infrared (mid-IR) laser system for TW-level eight-cycle pulses at 7 μm. This consists of an Er:Tm:Ho:fiber MOPA which serves as the seeder ZGP-based optical parametric chirped pulse amplification (OPCPA) chain, in addition to Ho:YLF amplifier is Tm:fiber pumped. Featuring all-optical synchronization, delivers 260 mJ pump energy 2052 nm and 16 ps duration 100 Hz with stability 0.8% rms over 20 min. show that chirp inversion OPCPA chain leads excellent extraction aids compression μm eight cycles (188 fs) bulk BaF2 93.5% efficiency. Using 21.7 available energy, we generate 0.75 due increased efficiency scheme. The quality system's output shown by generating high harmonics ZnSe span up harmonic order 13 contrast. combination passive carrier-envelope phase stable mid-IR seed picosecond makes this key enabling tool next generation studies on extreme photonics, strong field physics, table-top coherent X-ray science.

Language: Английский

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Hollow-core negative-curvature fiber for UV guidance

Optics Letters, Journal Year: 2018, Volume and Issue: 43(6), P. 1347 - 1347

Published: March 12, 2018

UV guiding fibers are highly sought after in laser and spectroscopy applications. Recent advances hollow-core fiber orient a practical approach for proper light delivery sustainable to high-power long-term irradiation. In this Letter, we report two types of negative-curvature (NCFs) spectral range. Their structures consist one ring six small (7.9 μm diameter) four big (20.8 tubes, enclosing hollow core similar size (∼15 diameter). The six-tube NCF shows an attenuation level 0.13±0.01 dB/m at 300 nm. It is capable delivering 20 ps, 160 μJ pulses 355 nm with no damage the facet. novel four-tube exhibits ∼0.3±0.15 Its fundamental mode guided intentionally designed "cladding mismatching" region. This design possesses high degree down-scalability deep-UV guidance has potential attaining polarization-maintaining performance.

Language: Английский

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Roadmap on photonic, electronic and atomic collision physics: I. Light–matter interaction

Journal of Physics B Atomic Molecular and Optical Physics, Journal Year: 2019, Volume and Issue: 52(17), P. 171001 - 171001

Published: July 25, 2019

Abstract We publish three Roadmaps on photonic, electronic and atomic collision physics in order to celebrate the 60th anniversary of ICPEAC conference. In Roadmap I, we focus light–matter interaction. this area, studies ultrafast molecular dynamics have been rapidly growing, with advent new light sources such as attosecond lasers x-ray free electron lasers. parallel, experiments established synchrotron radiation femtosecond using cutting-edge detection schemes are revealing scientific insights that never exploited. Relevant theories also being developed. Target samples for photon-impact expanding from atoms small molecules complex systems biomolecules, fullerene, clusters solids. This aims look back along road, explaining development these fields, forward, collecting contributions twenty leading groups field.

Language: Английский

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Efficient single-cycle pulse compression of an ytterbium fiber laser at 10 MHz repetition rate

Optics Express, Journal Year: 2020, Volume and Issue: 28(7), P. 9099 - 9099

Published: March 5, 2020

Over the past years, ultrafast lasers with average powers in 100 W range have become a mature technology, multitude of applications science and technology. Nonlinear temporal compression these to few- or even single-cycle duration is often essential, yet still hard achieve, particular at high repetition rates. Here we report two-stage system for compressing pulses from 1030 nm ytterbium fiber laser durations 5 µJ output pulse energy 9.6 MHz rate. In first stage, are compressed 340 25 fs by spectral broadening krypton-filled single-ring photonic crystal (SR-PCF), subsequent phase compensation being achieved chirped mirrors. second further soliton-effect self-compression neon-filled SR-PCF. We estimate ∼3.4 numerically back-propagating measured pulses. Finally, directly 3.8 (1.25 optical cycles) after compensating (using mirrors) dispersion introduced elements fiber, more than 50% total main peak. The can produce peak >0.6 GW transmission exceeding 66%.

Language: Английский

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Attosecond technology(ies) and science

Journal of Physics B Atomic Molecular and Optical Physics, Journal Year: 2021, Volume and Issue: 54(7), P. 070201 - 070201

Published: April 7, 2021

Since 2001 and the first demonstrations of feasibility generating measuring attosecond light pulses, science has developed into a very active quickly evolving research field. Its ultimate goal is real-time tracking electron dynamics in all forms matter, ranging from atoms large molecules to condensed phase plasmas. The accomplishment this required still calls for developments ultrafast laser technology, metrology, extreme ultra-violet (XUV) optics, pump–probe measurement schemes non-linear laser-matter interaction. Moreover, interpretation experimental results experiments stimulated guided major theoretical descriptions electronic processes matter. Motivated by these two decades development, several large-scale facilities, including infrastructure—attosecond pulse source (ELI-ALPS) free facilities (the linac coherent (LCLS) at Stanford European XFEL Hamburg) are now pushing development new generation sources. This considerable technological effort opens important perspectives field with potential applications photochemistry, photobiology advanced electronics. In context, joint focus issue on Attosecond technology(/ies) J. Phys. Photon. B: At. Mol. Opt. aims provide an overview state-of-the-art science, basic involved pulses technologies that required.

Language: Английский

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Bright, high-repetition-rate water window soft X-ray source enabled by nonlinear pulse self-compression in an antiresonant hollow-core fibre

Light Science & Applications, Journal Year: 2021, Volume and Issue: 10(1)

Published: Feb. 12, 2021

Abstract Bright, coherent soft X-ray radiation is essential to a variety of applications in fundamental research and life sciences. To date, high photon flux this spectral region can only be delivered by synchrotrons, free-electron lasers or high-order harmonic generation sources, which are driven kHz-class repetition rate with very peak powers. Here, we establish novel route toward powerful easy-to-use SXR sources presenting compact experiment nonlinear pulse self-compression the few-cycle regime combined phase-matched single, helium-filled antiresonant hollow-core fibre. This enables first 100 rate, table-top source that delivers an application-relevant 2.8 × 10 6 s −1 eV around 300 eV. The fibre integration temporal (leading formation necessary strong-field waveforms) pressure-controlled phase matching will allow compact, high-repetition-rate laser technology, including commercially available systems, drive simple cost-effective, high-flux sources.

Language: Английский

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Attosecond state-resolved carrier motion in quantum materials probed by soft x-ray XANES

Applied Physics Reviews, Journal Year: 2021, Volume and Issue: 8(1)

Published: March 1, 2021

Recent developments in attosecond technology led to tabletop X-ray spectroscopy the soft range, thus uniting element- and state-specificity of core-level x-ray absorption with time resolution follow electronic dynamics real time. We describe recent work investigations into materials such as Si, SiO2, GaN, Al2O3, Ti, TiO2, enabled by convergence these two capabilities. showcase state-of-the-art on isolated pulses for near edge (XANES) observe 3d-state semi-metal TiS2 at Ti L-edge (460 eV). how transition metal quantum material allows unambiguously identify where optical field influences charge carriers. This precision elucidates that Ti:3d conduction band states are efficiently photo-doped a density 1.9 x 10^21 cm^-3 light-field induces coherent motion intra-band carriers across 38% first Brillouin zone. Lastly, we prospects unambiguous real-time observation carrier specific bonding or anti-bonding speculate capability will bring unprecedented opportunities towards an engineered approach designer pre-defined properties efficiency. Examples composites semiconductors insulators like Ge, BN, graphene, TMDCs, high-Tc superconductors NbN LaBaCuO. Exiting scrutinize canonical questions multi-body physics whether electrons lattice trigger phase transitions.

Language: Английский

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Solitary beam propagation in periodic layered Kerr media enables high-efficiency pulse compression and mode self-cleaning

Light Science & Applications, Journal Year: 2021, Volume and Issue: 10(1)

Published: March 10, 2021

Abstract Generating intense ultrashort pulses with high-quality spatial modes is crucial for ultrafast and strong-field science can be achieved by nonlinear supercontinuum generation (SCG) pulse compression. In this work, we propose that the of quasi-stationary solitons in periodic layered Kerr media greatly enhance light-matter interaction fundamentally improve performance SCG compression condensed media. With both experimental theoretical studies, successfully identify these solitary reveal their unified condition stability. Space-time coupling shown to strongly influence stability solitons, leading variations spectral, temporal profiles femtosecond pulses. Taking advantage unique characteristics modes, first demonstrate single-stage from 170 22 fs an efficiency >85%. The high spatiotemporal quality compressed further confirmed high-harmonic generation. We also provide evidence efficient mode self-cleaning, which suggests rich self-organization laser beams a resonator. This work offers route towards highly efficient, simple, stable flexible solutions state-of-the-art ytterbium technology.

Language: Английский

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