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Article
Investigation of ultrashort laser excitation of aluminum and tungsten by reflectivity measurements
We determine the laser-induced ablation threshold fluence in air of aluminum and tungsten excited by single near-infrared laser pulses with duration ranging from 15 to 100 fs. The ablation threshold fluence is...
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Article
Correction to: 22 W average power multiterawatt femtosecond laser chain enabling 1019 W/cm2 at 100 Hz
In the original publication, we erroneously reported that the substrate of the diffraction gratings used in the experiments was made of low expansion glass (zerodur). In fact, the substrate of the diffraction ...
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Article
22 W average power multiterawatt femtosecond laser chain enabling 1019 W/cm2 at 100 Hz
We measure the wavefront distortions of a high peak power ultrashort (23 fs) laser system under high average power load. After 6 min—100 Hz operation of the laser at full average power (> 22 W after compressio...
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Article
High temporal resolution and calibration in pump–probe experiments characterizing femtosecond laser–dielectrics interaction
In the aim of performing pump–probe experiments with a high temporal accuracy, the determination of the perfect temporal overlap of the two incoming pulses is crucial. When addressing laser–dielectrics interac...
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Article
Guidelines for efficient direct ablation of dielectrics with single femtosecond pulses
We provide guidelines to femtosecond laser users to select ad hoc laser parameters, namely the fluence and pulse duration, in the context of the development of ablation processes at the surface of dielectrics ...
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Article
Laser-driven high-frequency vibrations of metal blister surface
Time-resolved interferometric microscopy was applied to investigate laser-induced blistering of a titanium film on a silica substrate. Ablation of the titanium/silica interface by single 0.7 ns pulses within a...
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Article
Control of material removal of fused silica with single pulses of few optical cycles to sub-picosecond duration
Surface ablation of a dielectric material (fused silica) by single femtosecond pulses is studied as a function of pulse duration (7–450 fs) and applied fluence (F th<F<10F ...
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Article
Shadowgraphic imaging of laser transfer driven by metal film blistering
A time-resolved shadowgraphic technique was used to investigate local transfer of diamond nanopowder from a thin titanium film on a silica support under irradiation by 450-fs or 50-ps laser pulses. Clean powde...
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Article
Laser transfer of diamond nanopowder induced by metal film blistering
Blister-based laser induced forward transfer (BB-LIFT) is a promising technique to produce surface microstructures of various advanced materials including inorganic and organic micro/nanopowders, suspensions a...
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Article
Measurement of femtosecond laser-induced damage and ablation thresholds in dielectrics
The paper is focused on the importance of accurate determination of surface damage/ablation threshold of a dielectric material irradiated with femtosecond laser pulses. We show that different damage characteri...
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Article
Photolytical XeF(C–A) laser amplifier of femtosecond optical pulses: gain measurements and pump efficiency
Gain characteristics of a photolytically driven XeF(C–A) laser amplifier are studied experimentally in the unsaturated amplification regime. The gaseous active medium is optically pumped by vacuum-ultraviolet ...
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Article
Time-of-flight measurements of ejected particles during dry laser cleaning
We propose an experimental approach which allows the characterization of the dynamics of the ejected particles in dry laser cleaning. Submicron silica particles on silicon substrates were illuminated by single...
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Article
Architecture of a blue high contrast multiterawatt ultrashort laser
The strategy used to develop an innovative high contrast multiterawatt femtosecond laser chain based on a hybrid (solid/gas) technology is reported. The laser system includes a Ti:sapphire oscillator generatin...
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Article
Numerical study of ultra-short laser ablation of metals and of laser plume dynamics
Numerical modeling is used to investigate the physical mechanisms of the interaction of ultra-short (sub-picosecond) laser pulses with metallic targets. The laser–target interaction is modeled by using a one-d...
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Article
Surface nanostructuring of metals by laser irradiation: effects of pulse duration, wavelength and gas atmosphere
Surface modifications by nanostructuring present a new laser application for improvement of surface properties such as adhesion, mechanical characteristics or corrosion protection. In this study, we report the...
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Article
Femtosecond laser ablation of cemented carbides: properties and tribological applications
Laser ablation with fs laser pulses was performed in air on cobalt cemented tungsten carbide by means of a Ti : sapphire laser (800 nm, 100 fs). Small and moderate fluences (2, 5, 10 J/cm2) and up to 5×104 pulses...
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Article
Femtosecond ablation of ultrahard materials
Several ultrahard materials and coatings of definite interest for tribological applications were tested with respect to their response when irradiated with fs laser pulses. Results on cemented tungsten carbide...
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Article
Synthesis and properties of Si and Ge nanoclusters produced by pulsed laser ablation
We show that conventional pulsed laser ablation (PLA) of Si and Ge targets in inert buffer gases is an efficient method of nanocluster synthesis. From a photoluminescence study of Si and Ge nanoclusters produ...
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Article
Influence of cathode roughness on discharge homogeneity of a high-pulse repetition frequency long-pulse XeCl laser
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Article
Improvement of average laser power and beam divergence of a high pulse repetition frequency excimer laser