Results 1 to 10 of about 8,387 (250)

A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing

Scientific Reports, 2017
Several detrimental effects limit the use of ultrafast lasers in multi-photon processing and the direct manufacture of integrated photonics devices, not least, dispersion, aberrations, depth dependence, undesirable ablation at a surface, limited depth of
Jerome Lapointe, Raman Kashyap
doaj   +1 more source

High-Repetition-Rate Ultrafast Fiber Lasers for Material Processing [PDF]

IEEE Journal of Selected Topics in Quantum Electronics, 2018
Ultrafast lasers operating at high repetition rates, in particular the GHz range, enable new possibilities in laser-material processing, particularly accessing the recently demonstrated ablation-cooled regime. We provide a unified perspective of the unique opportunities created by operating at high repetition rates together with our efforts into the ...
Hamit Kalaycioglu, Parviz Elahi, Onder Akcaalan, Fatih Omer Ilday   +3 more
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Investigation on repetition rate and pulse duration influences on ablation efficiency of metals using a high average power Yb-doped ultrafast laser

MATEC Web of Conferences, 2013
Ultrafast lasers provide an outstanding processing quality but their main drawback is the low removal rate per pulse compared to longer pulses. This limitation could be overcome by increasing both average power and repetition rate.
Lopez J., Torres R., Zaouter Y., Georges P., Hanna M., Mottay E., Kling R.   +6 more
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Intensity Modulation Effects on Ultrafast Laser Ablation Efficiency and Defect Formation in Fused Silica

Nanomaterials
Ultrafast laser processing is a critical technology for micro- and nano-fabrication due to its ability to minimize heat-affected zones. The effects of intensity variation on the ultrafast laser ablation of fused silica were investigated to gain ...
Dai Yoshitomi, Hideyuki Takada, Shinichi Kinugasa, Hiroshi Ogawa, Yohei Kobayashi, Aiko Narazaki   +5 more
doaj   +1 more source

Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium

Applied Sciences, 2021
Evaluating the optical properties of matter under the action of ultrafast light is crucial in modeling laser–surface interaction and interpreting laser processing experiments.
Elena Silaeva, Louis Saddier, Jean-Philippe Colombier   +2 more
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Metasurface with all-optical tunability for spatially-resolved and multilevel thermal radiation

Nanophotonics
Manipulating the thermal emission in the infrared (IR) range significantly impacts both fundamental scientific research and various technological applications, including IR thermal camouflage, information encryption, and radiative cooling.
Jiao Shuhui, Zhao Kang, Jiang Jianhui, Zhao Kailin, Guo Qin, Wang Jingbo, Zhang Yansong, Chen Gang, Cheng Qian, Zuo Pei, Han Weina   +10 more
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Advances and opportunities of ultrafast laser synthesis and processing [PDF]

MRS Bulletin, 2016
Abstract
Steven M. Yalisove, Koji Sugioka, Costas P. Grigoropoulos   +2 more
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Ultrafast Laser Pulses for Structuring Materials at Micro/Nano Scale: From Waveguides to Superhydrophobic Surfaces

Photonics, 2017
The current demand for fabricating optical and photonic devices displaying high performance, using low-cost and time-saving methods, prompts femtosecond (fs)-laser processing as a promising methodology.
Daniel S. Correa, Juliana M. P. Almeida, Gustavo F. B. Almeida, Marcos R. Cardoso, Leonardo De Boni, Cleber R. Mendonça   +5 more
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Optimizing Semiconductor Saturable Absorption Mirrors Using Subwavelength Dielectric Gratings for Fiber Lasers

Photonics
Ultrafast fiber lasers have shown exceptional performance across various domains, including material processing, medical applications, and optoelectronic communication.
Chaoqun Wei, Xiansheng Jia, Hongmei Chen, Boyuan Liu, Ziyang Zhang, Cheng Jiang   +5 more
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Experimental Investigations on Laser Ablation of Aluminum in Sub-Picosecond Regimes

Applied Sciences, 2020
Due to high power and ultrashort pulses, femtosecond lasers excel at (but are not limited to) processing materials whose thicknesses are less than 500 microns. Numerous experiments and theoretical analyses testify to the fact that there are solid grounds
Katarzyna Garasz, Marek Kocik
doaj   +1 more source