Femtosecond laser ablation of silver foil with single and double pulses

Roberts, D.E.; Plessis, Anton du; Botha, Lourens R.

doi:10.1016/j.apsusc.2009.10.004

Cited by 54 publications

(29 citation statements)

References 44 publications

(77 reference statements)

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“…With 50 fs pulses, the total plasma intensity with double pulses of 20 µJ (220 µJ) was 100 times higher than the one with a single pulse of the same pulse energy (120 µJ), and 50 times higher than the one with a single pulse but with a doubled pulse energy (140 µJ). Our observations on ultrashort double pulse ablation have been confirmed in similar studies in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionsupporting

confidence: 77%

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Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Semerok¹,

Dutouquet²

2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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To cite this version:A. Semerok, Christophe Dutouquet. Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet : A comparative study. Spectrochimica Acta Part B: Atomic Spectroscopy, Elsevier, 2014Elsevier, , 99, pp.163-171. 10.1016Elsevier, /j.sab.2014 A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT Abstract.Ultrashort pulse laser microablation coupled with optical emission spectroscopy was under study to obtain several micro-LIBS analytical features (shot-to-shot reproducibility, spectral line intensity and lifetime, calibration curves, detection limits). Laser microablation of Al matrix samples with known Cu-and Mg-concentrations was performed by single and double pulses of 50 fs and 1 ps pulse duration in air and with Ar-jet.The micro-LIBS analytical features obtained under different experimental conditions were characterized and compared. The highest shot-to-shot reproducibility and gain in plasma spectral line intensity were obtained with double pulses with Ar-jet for both 50 fs and 1 ps pulse durations. The best calibration curves were obtained with 1ps pulse duration with Ar-jet. Micro-LIBS with ultrashort double pulses may find its effective application for surface elemental microcartography.

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Section: Introductionsupporting

confidence: 77%

“…The analysis of our results and those obtained in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] has revealed the fundamental role of the electron-lattice relaxation time ( el .  1-10 ps) for laser ablation regime and the resulting double pulse LIBS-features.…”

Section: Discussionmentioning

confidence: 99%

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Semerok¹,

Dutouquet²

2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Recently, a dual-pulse femtosecond laser for ablation of silver foil in vacuum was presented [33]. It was also found that the ablation depth does not always decrease as the t sep increases longer than 10 ps.…”

Section: Resultsmentioning

confidence: 98%

“…Interestingly, the study in which a dual-pulse femtosecond laser train was used to groove steel showed that the ablation depth is dramatically increased with an increase in tsep, with a maximum ablation depth in the range of 5-30 ps obtained [21]. Recently, a dual-pulse femtosecond laser for ablation of silver foil in vacuum was presented [33]. It was also found that the ablation depth does not always decrease as the tsep increases longer than 10 ps.…”

Section: Modelingmentioning

confidence: 98%

Drilling of Copper Using a Dual-Pulse Femtosecond Laser

Cheng

Chen

2016

Technologies

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Abstract:The drilling of copper using a dual-pulse femtosecond laser with wavelength of 800 nm, pulse duration of 120 fs and a variable pulse separation time (0.1-150 ps) is investigated theoretically. A one-dimensional two-temperature model with temperature-dependent material properties is considered, including dynamic optical properties and the thermal-physical properties. Rapid phase change and phase explosion models are incorporated to simulate the material ablation process. Numerical results show that under the same total laser fluence of 4 J/cm 2 , a dual-pulse femtosecond laser with a pulse separation time of 30-150 ps can increase the ablation depth, compared to the single pulse. The optimum pulse separation time is 85 ps. It is also demonstrated that a dual pulse with a suitable pulse separation time for different laser fluences can enhance the ablation rate by about 1.6 times.

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“…For bursts with shorter inter-pulse delay, it was reported that plasma shielding limits the removal efficiency [14] while longer delays cause highenergy plasma generation that is explosively remelting the surface, in turn increasing surface roughness significantly [11]. In case of pulse-train processing with very short picosecond inter-pulse delay, by contrast, electron/ion yield [15][16][17], plasma intensity [18][19][20][21], and phonon temperature [17,[22][23][24][25][26] increase as a result of enhanced photon efficiency. For the latter, temperature simulations indicate that inter-pulse delay of 10 ps or less is optimal for maximum heating.…”

Section: Introductionmentioning

confidence: 98%

Experimental study on double-pulse laser ablation of steel upon multiple parallel-polarized ultrashort-pulse irradiations

et al. 2016

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In this paper, double-pulse laser processing is experimentally studied with the aim to explore the influence of ultrashort pulses with very short time intervals on ablation efficiency and quality. For this, sequences of 50 double pulses of varied energy and inter-pulse delay, as adjusted between 400 fs and 18 ns by splitting the laser beam into two optical paths of different length, were irradiated to technical-grade stainless steel. The depth and the volume of the craters produced were measured in order to evaluate the efficiency of the ablation process; the crater quality was analyzed by SEM micrographs. The results obtained were compared with craters produced with sequences of 50 single pulses and energies equal to the double pulse. It is demonstrated that double-pulse processing cannot exceed the ablation efficiency of single pulses of optimal fluence, but the ablation crater surface formed smoother if inter-pulse delay was in the range between 10 ns and 18 ns. In addition, the influence of pulse duration and energy distribution between the individual pulses of the double pulse on ablation was studied. For very short inter-pulse delay, no significant effect of energy variation within the double pulse on removal rate was found, indicating that the double pulse acts as a big single pulse of equal energy. Further, the higher removal efficiency was achieved when double-pulse processing using femtosecond pulses instead of picosecond pulses.

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Femtosecond laser ablation of silver foil with single and double pulses

Cited by 54 publications

References 44 publications

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Drilling of Copper Using a Dual-Pulse Femtosecond Laser

Experimental study on double-pulse laser ablation of steel upon multiple parallel-polarized ultrashort-pulse irradiations

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