Investigation on single-pulse 266 nm nanosecond laser and 780 nm femtosecond laser ablation of sapphire

2020 ◽  
Author(s):  
Zhen Tian ◽  
Xue Li ◽  
Litao Qi
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Single Pulse ◽  
Nanosecond Laser

scholarly journals Femtosecond laser ablation of brass: A study of surface morphology and ablation rate

2012 ◽  
Vol 30 (3) ◽  
pp. 473-479 ◽  
Author(s):  
Mohamed E. Shaheen ◽  
Brian J. Fryer
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Surface Morphology ◽  
Fine Particles ◽  
Femtosecond Laser Ablation ◽  
Laser Pulses ◽  
Ambient Air ◽  
Ablation Rate ◽  
Femtosecond Laser Pulses ◽  
Nanosecond Laser

AbstractThe interaction of near infrared femtosecond laser pulses with a Cu based alloy (brass) in ambient air at atmospheric pressure and under different laser conditions was investigated. The effects of laser fluence and number of pulses on surface morphology and ablation rate were studied using scanning electron microscopy (SEM) and optical microscopy. Ablation rates were found to rapidly increase from 83 to 604 nm/pulse in the fluence range 1.14–12.21 J/cm2. At fluence >12.21 J/cm2, ablation rates increased slowly to a maximum (607 nm/pulse at 19.14 J/cm2), and then decreased at fluence higher than 20.47 J/cm2 to 564 nm/pulse at 24.89 J/cm2. Large amounts of ablated material in a form of agglomerated fine particles were observed around the ablation craters as the number of laser pulses and fluence increased. The study of surface morphology shows reduced thermal effects with femtosecond laser ablation in comparison to nanosecond laser ablation at low fluence.

scholarly journals Fabrication of an antireflection microstructure on AgClBr polycrystalline fiber by single pulse femtosecond laser ablation

2021 ◽  
Vol 11 (2) ◽  
pp. 487
Author(s):  
Mikhail K. Tarabrin ◽  
Andrey A. Bushunov ◽  
Andrei A. Teslenko ◽  
Tatiana Sakharova ◽  
Jonas Hinkel ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Single Pulse

Femtosecond Laser Ablation of Titanium and Silicon

2000 ◽  
Author(s):  
Mengqi Ye ◽  
Costas P. Grigoropoulos
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Laser System ◽  
Femtosecond Laser Ablation ◽  
Laser Pulses ◽  
Femtosecond Laser Irradiation ◽  
Nanosecond Laser ◽  
Iccd Camera ◽  
Plume Emission

Abstract Femtosecond laser ablation of titanium and silicon samples has been studied via time-of-flight (TOF), emission spectroscopy and microscopy measurement. Laser pulses of around 100 fs (FWHM) at λ = 800 nm were delivered by a Ti:sapphire femtosecond laser system. A vacuum chamber with a base pressure of 10−7 torr was built for ion TOF measurement. These ion TOF spectra were utilized to determine the velocity distribution of the ejected ions. While nanosecond laser ablation typically generates ions of a few tens of eV, femtosecond laser irradiation even at moderate energy densities can produce energetic ions with energies of up to a few keV. The most probable energy of these fast ions is proportional to the laser fluence. The structure and number of peaks of the TOF spectra varies with the laser fluence. Images of plume emission were captured by an intensified CCD (ICCD) camera. The plume emission spectrum was analyzed by a spectrometer. Laser ablated craters were measured by an interferometric microscope and a scanning electron microscope (SEM). Ablation yield was expressed as a function of laser fluence, and number of shots.

Fabrication of antireflection microstructures on the surface of GaSe crystal by single-pulse femtosecond laser ablation

2020 ◽  
Vol 45 (21) ◽  
pp. 5994
Author(s):  
Andrey A. Bushunov ◽  
Andrei A. Teslenko ◽  
Mikhail K. Tarabrin ◽  
Vladimir A. Lazarev ◽  
Lyudmila I. Isaenko ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Single Pulse

scholarly journals Nonlinear enhancement of femtosecond laser ablation efficiency by hybridization with nanosecond laser

2006 ◽  
Vol 14 (20) ◽  
pp. 9544 ◽  
Author(s):  
J. S. Yahng ◽  
B. H. Chon ◽  
C. H. Kim ◽  
S. C. Jeoung ◽  
H. R. Kim
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Nanosecond Laser ◽  
Ablation Efficiency

Modeling and Fabrication of an Antireflection Microstructure on an AgClBr Fiber by Single-pulse Femtosecond Laser Ablation

2021 ◽  
Author(s):  
Mikhail Tarabrin ◽  
Andrey Bushunov ◽  
Andrei Teslenko ◽  
Vladimir Lazarev ◽  
Tatiana Sakharova ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Single Pulse

scholarly journals Effects of static and dynamic femtosecond laser modifications of Ti/Zr multilayer thin films

2021 ◽  
Vol 75 (12) ◽  
Author(s):  
Suzana Petrović ◽  
G. D. Tsibidis ◽  
A. Kovačević ◽  
N. Božinović ◽  
D. Peruško ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Elemental Composition ◽  
Pulse Energy ◽  
Thermal Response ◽  
Femtosecond Laser Ablation ◽  
Single Pulse ◽  
Layer By Layer ◽  
Laser Polarization ◽  
Pulse Irradiation

Abstract The experimental study of the static and dynamic femtosecond laser ablation of the multilayer 15x(Ti/Zr)/Si system is reported. The layer-by-layer selective laser ablation mechanism was studied by analysis of the surface morphology and elemental composition in static single pulse irradiation in a range of pulse energy from 10 to 17 $$\upmu $$ μ J. The selective ablations, as number of concentric circles in modified spots are increased with the pulse energy. The boundary between the circles was shown a change in the depth, comparable to the thickness of the individual layers. Changes in the elemental composition at the edges are associated with the removal of the layer by layer. The dynamic multipulse irradiation was observed via the production of lines with laser-induced periodic surface structures (LIPSS) at different laser parameters (scan velocities and laser polarization). The spatial periodicity of the formed LIPSS depends on changes in the effective number of pulses and laser polarization, as well as the nature of the material. For better interpretation of the experimental results, simulations have been conducted to explore the thermal response of the multiple layered structure 15x(Ti/Zr) after static single pulse irradiation. Graphic Abstract

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