A Method for Optodynamic Characterization of Erbium Laser Ablation Using Piezoelectric Detection

Bosiger, Georgije; Perhavec, Tadej; Diaci, Janez

doi:10.5545/sv-jme.2013.1077

Cited by 4 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several methods of detecting the acoustic waves and plasma spectrum during the thin-layer removal have been investigated [1][2][3]. Here, the acoustic waves have been measured by a microphone and a laser-beam-deflection probe [2,[4][5][6]. The main idea behind these methods is to detect the time-of-flight of the shock wave, which is generated during the laser ablation, since the shock wave's velocity varies with the optodynamic (OD) energy-conversion efficiency, defined as the ratio between the mechanical energy of the macroscopic motion and the excitation-pulse energy [7].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of laser-induced thin-layer removal by using shadowgraphy and laser-induced breakdown spectroscopy

et al. 2016

View full text Add to dashboard Cite

Shadow photography and laser-induced breakdown spectroscopy (LIBS) are studied as methods for monitoring the selective removal of thin (i.e., under 100 m) layers by laser ablation. We used a laser pulse of 5 ns and 16 mJ at 1064 nm to ablate an 18-m-thin copper layer from the fiberglass substrate. On the basis of shadowgraphs of the laser-induced shock waves, we measured the optodynamic energy-conversion efficiency, defined as the ratio between the mechanical energy of the shock wave and the excitation-pulse energy. Our results show that this efficiency is significantly higher for the laser-pulse-copper interaction than for the interaction between the excitation pulse and the substrate. LIBS was simultaneously employed in our experimental setup. The optical emission from the plasma plume was collected by using a spectrograph and recorded with a streak camera. We show that advancing of laser ablation through the copper layer and reaching of the substrate can be estimated by tracking the spectral region between 370 nm and 500 nm. Therefore, the presented results confirm that LIBS method enables an on-line monitoring needed for selective removal of thin layers by laser.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of laser-induced thin-layer removal by using shadowgraphy and laser-induced breakdown spectroscopy

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The expanded mathematical model enables the proper stimulant waveform to be constructed and the sensor aperture effect [17] to be correctly accounted for, resulting in a proper and more accurate sensor spectral transfer function. The sensor can thus be correctly calibrated, even for higher frequencies than before, and used for measurement and identification of the individual wave-arrivals of ultrasonic waves in acoustic emission and laser ultrasound.…”

Section: Introductionmentioning

confidence: 99%

High-Frequency Calibration of Piezoelectric Displacement Sensors Using Elastic Waves Induced by Light Pressure

Laloš

Požar

Možina

2015

SV-JME

View full text Add to dashboard Cite

In the study of ultrasound propagation in matter, displacement sensors are indispensable and of these, the most sensitive are piezoelectric sensors. In order to eliminate the intrinsic effects of the sensor from the measurements, the sensor has to be properly calibrated, which means that its transfer function has to be evaluated from a known sensor input signal and a measured sensor output signal. This has usually been done by comparing the sensor response signal to a known input signal, namely, an ultrasonic waveform, which can be theoretically calculated using mathematical models and numerical algorithms. Until now, the point-source-point-sensor model has been primarily used, while ultrasonic waves were induced mechanically either by a dropped ball or a capillary fracture. In this paper, a real-source-real-sensor model is presented. It provides a more faithful waveform construction and it enables the removal of the aperture effect from the calculated sensor transfer function, thus giving correct and universal sensor response characteristics. This was corroborated by high-frequency calibration measurements of the output signal of a Glaser-type conical sensor in two positions on both surfaces of a glass plate, while ultrasonic waves were induced by the radiation pressure of a nanosecond laser pulse.

show abstract

Optodynamic energy conversion efficiency during laser ablation on metal surfaces measured by shadow photography

et al. 2014

View full text Add to dashboard Cite

A Method for Optodynamic Characterization of Erbium Laser Ablation Using Piezoelectric Detection

Cited by 4 publications

References 22 publications

Evaluation of laser-induced thin-layer removal by using shadowgraphy and laser-induced breakdown spectroscopy

Evaluation of laser-induced thin-layer removal by using shadowgraphy and laser-induced breakdown spectroscopy

High-Frequency Calibration of Piezoelectric Displacement Sensors Using Elastic Waves Induced by Light Pressure

Optodynamic energy conversion efficiency during laser ablation on metal surfaces measured by shadow photography

Contact Info

Product

Resources

About