Results 11 to 20 of about 39,508 (311)
Ultrafast Laser Synthesis of Zeolites. [PDF]
Adv MaterAbstract Research demonstrates that zeolite nucleation and growth can be controlled by fine‐tuning chemical composition, temperature, and pressure, resulting in structures with diverse porosities and functionalities. Nevertheless, current energy delivery methods lack the finesse required to operate on the femto‐ and picosecond ...
Galioglu S +11 more
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Ultrafast 3.5 µm fiber laser [PDF]
Optics Letters, 2021 We report, to the best of our knowledge, the first mode-locked fiber laser to operate in the femtosecond regime well beyond 3 µm. The laser uses dual-wavelength pumping and nonlinear polarization rotation to produce 3.5 µm wavelength pulses with minimum duration of 580 fs at a repetition rate of 68 MHz.
Nathaniel Bawden +3 more
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Ultrafast Laser Welding of Silicon
Advanced Photonics Research, 2023 While ultrafast laser welding is an appealing technique for bonding transparent workpieces, it is not applicable for joining silicon samples due to nonlinear propagation effects which dramatically diminish the possible energy deposition at the interface.
Maxime Chambonneau +4 more
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Journal of Materials Research and Technology, 2022 In this paper, the focus rotation has been adopted in the fiber laser butt welding of 4 mm thick Selective Laser Melting GH3536 and rolled solid solution GH3128. The weld morphology, microstructure, microhardness, joint strength and fracture morphologies
Zhiwei Cheng +6 more
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Distributed ultrafast fibre laser [PDF]
Scientific Reports, 2015 AbstractA traditional ultrafast fibre laser has a constant cavity length that is independent of the pulse wavelength. The investigation of distributed ultrafast (DUF) lasers is conceptually and technically challenging and of great interest because the laser cavity length and fundamental cavity frequency are changeable based on the wavelength.
Liu, X. +5 more
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In situ measurement of particle flow during fiber laser additive manufacturing with powder feeding
Results in Physics, 2022 In situ measurement of particle flow is a promising tool to visualize how the particles affect the power feeding laser additive manufacturing (PFLAM).
Jianglin Zou +4 more
doaj +1 more source
Ultrafast laser welding of ceramics [PDF]
Science, 2019 Joining the laser welding club Laser welding is an integral part of modern manufacturing, but it fractures ceramic materials. Penilla et al. developed two methods for welding ceramics using ultrafast lasers. One method tunes the ceramic properties, allowing the laser to transit through the ceramic and weld
E. H. Penilla +8 more
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Broadband, high power THz source at 540 kHz using organic crystal BNA
APL Photonics, 2023 We demonstrate efficient optical rectification in the organic crystal BNA (N-benzyl-2-methyl-4-nitroaniline), driven by a temporally compressed, commercially available industrial Yb-laser system operating at a 540 kHz repetition rate. Our terahertz (THz)
Samira Mansourzadeh +5 more
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In situ detection of plume particles in intelligent laser welding
Materials & Design, 2022 This study aimed to propose the in situ measurement of particles based on the self-mixing interferometry (SMI) effect for monitoring the dynamic behaviors of the plume. This method was verified through the in situ measurement of tiny moving metal objects.
Jianglin Zou +4 more
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