Опубликована: Янв. 1, 2023
We report a high-energy Tm-doped chirped-pulse-amplification fiber laser system seeded by dissipative solitons at 1902 nm. The provides output pulses with pulse energy of 120 nJ and duration 940 fs.
Язык: Английский
Advances in Optics and Photonics, Год журнала: 2022, Номер 14(4), С. 652 - 652
Опубликована: Авг. 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
Язык: Английский
Процитировано
42
Structural Dynamics, Год журнала: 2024, Номер 11(1)
Опубликована: Янв. 1, 2024
Novel ultrafast x-ray sources based on high harmonic generation and at free electron lasers are opening up new opportunities to resolve complex processes in condensed phase systems with exceptional temporal resolution atomic site specificity. In this perspective, we present techniques for resolving charge localization, transfer, separation organic semiconductors photovoltaic devices time-resolved soft spectroscopy. We review recent results spectroscopy of these discuss routes overcome the technical challenges performing experiments photosensitive materials poor thermal conductivity low pump intensity thresholds nonlinear effects.
Язык: Английский
Процитировано
8
Optics Express, Год журнала: 2022, Номер 30(24), С. 44270 - 44270
Опубликована: Окт. 19, 2022
We investigate the influence of pump wavelength on high-power amplification large-mode area, thulium-doped fibers which are suitable for an ultrashort pulsed operation in 2 µm region. By pumping a standard, commercially available photonic crystal fiber amplifier configuration at 1692 nm, slope efficiency 80 % average output power 60 W could be shown. With help simulations we effect cross-relaxations and thermal behavior. extend our investigations to rod-type, large-pitch with very large mode is exceptionally suited high-energy ultrafast operation. Pumping nm leads 74 67 W, instead 38 obtained when 793 nm. These results pave way highly efficient fiber-based CPA systems.
Язык: Английский
Процитировано
26
Optics Letters, Год журнала: 2023, Номер 48(10), С. 2647 - 2647
Опубликована: Апрель 14, 2023
We report the nonlinear pulse compression of a high-power, thulium-doped fiber laser system using gas-filled hollow-core fiber. The sub-two cycle source delivers 1.3 mJ energy with 80 GW peak power at central wavelength 1.87 μm and an average 132 W. This is, so far, to best our knowledge, highest few-cycle reported in short-wave infrared region. Given its unique combination high power, this is excellent driver for frequency conversion, toward terahertz, mid-infrared, soft X-ray spectral regions.
Язык: Английский
Процитировано
13
Journal of the Optical Society of America B, Год журнала: 2023, Номер 40(4), С. 796 - 796
Опубликована: Фев. 23, 2023
Femtosecond long-wave-infrared (LWIR) pulses have found applications in several fields, but their generation is limited to CO 2 lasers and solid-state frequency converters. Waveguide-based Raman red shifting provides another promising solution efficiently generate LWIR pulses. Here, we numerically study pulse a hydrogen-filled hollow-core fiber. Several excitation schemes are considered, involving one or two at either the same different wavelengths. The analysis reveals that waveguide structure enables tailoring of gain, which required produce With ∼5-mJ 50-fs input pulses, clean 400-µJ 88-fs 12 µm theoretically generated with 41% total quantum efficiency. simulations also provide insight into nonlinear dynamics where concept phonon amplifier underlies optimal performance can be achieved. Only two-pulse scheme two-color source creates good for efficient generation.
Язык: Английский
Процитировано
12
Frontiers of Optoelectronics, Год журнала: 2024, Номер 17(1)
Опубликована: Май 28, 2024
In this paper, we report a coherent beam combining (CBC) system that involves two thulium-doped all-polarization maintaining (PM) fiber chirped pulse amplifiers. Through phase-locking the channels via stretcher by using stochastic parallel gradient descent (SPGD) algorithm, maximum average power of 265 W is obtained, with CBC efficiency 81% and residual phase error λ/17. After de-chirping pair diffraction gratings, duration combined laser compressed to 690 fs. Taking into account compression 90% main peak energy proportion 91%, corresponding calculated be 4 MW. The noise characteristics before after are examined, results indicate would degrade low frequency relative intensity (RIN), which integration 1.74% in [100 Hz, 2 MHz] at output power. addition, effects nonlinear spectrum broadening during amplification on also investigated, showing higher extent stretching effective alleviating realizing decent efficiency.
Язык: Английский
Процитировано
5
IEEE Journal of Selected Topics in Quantum Electronics, Год журнала: 2024, Номер 30(6: Advances and Applications), С. 1 - 11
Опубликована: Май 16, 2024
Язык: Английский
Процитировано
4
APL Photonics, Год журнала: 2025, Номер 10(5)
Опубликована: Май 1, 2025
Short-wavelength radiation in the extreme ultraviolet (XUV) and soft x-ray spectral regions offers unique advantages for imaging. With wavelengths ranging from a few nanometers to tens of nanometers, these techniques enable spatial resolutions at nanometer scale. In addition, penetration depths solids this regime non-destructive imaging internal structures micrometer-thick objects, surpassing capabilities electron microscopy. Furthermore, diverse atomic absorption edges characteristic region high-contrast without any staining or labeling. When combined with quantitative phase-sensitive techniques, even material identification nanoscale becomes feasible. This article reviews some latest advancements field. It provides an overview available tabletop sources discusses concepts state-of-the-art results two complementary techniques: XUV ptychography coherence tomography. While achieves lateral resolution, tomography enables axial resolution. Both allow mapping chemical composition samples, facilitating localized analysis compositions integrated circuits microorganisms. The also presents perspective on future developments time-resolved 3D potential application fields.
Язык: Английский
Процитировано
0
Optics Letters, Год журнала: 2022, Номер 47(14), С. 3511 - 3511
Опубликована: Июнь 17, 2022
We report on the generation of GW-class peak power, 35-fs pulses at 2-µm wavelength with an average power 51 W 300-kHz repetition rate. A compact, krypton-filled Herriott-type cavity employing metallic mirrors is used for spectral broadening. This multi-pass compression stage enables efficient post emitted by ultrafast coherently combined thulium-doped fiber laser system. The presented results demonstrate excellent preservation input beam quality in combination a transmission as high 80%. These show that cell based post-compression attractive alternative to nonlinear broadening fibers, which commonly employed and other mid-infrared systems. Particularly, scalability potential achieve few-cycle pulse durations make this scheme highly attractive.
Язык: Английский
Процитировано
14
APL Photonics, Год журнала: 2023, Номер 8(11)
Опубликована: Ноя. 1, 2023
Filamentation has extensively been explored and is well understood at repetition rates <1 kHz due to the typical availability of multi-mJ laser systems a moderate average power. The advent high-power Yb-lasers opened new possibilities for filamentation research. However, so far, high power Yb have mostly increase driving pulse energy several hundreds mJ not significantly higher rates. In this paper, we study, first time, long filaments unprecedented 10, 40, 100 using 500-W Yb-doped thin-disk amplifier driver operating with sub-700 fs pulses. We compare filament length, density hole, fluorescence constant peak but different find strong dependence on length depletion rate. Our analysis reveals emergence significant stationary 40 kHz. corresponding reduction in breakdown threshold by increasing rate observed our study signifies promising avenue enhancing efficiency reliability electric discharge triggering various scenarios. Using capacitive plasma probe measurements, address limitations imaging-based measurements demonstrate systematic underestimation length. This work contributes deeper understanding interplay between rates, filamentation, heat-driven effects from high-repetition-rate will contribute guiding future research, making use
Язык: Английский
Процитировано
6