Evolution of Laser Ablation Plume Measured by Self-Mixing Interferometry | IEEE Conference Publication | IEEE Xplore

Evolution of Laser Ablation Plume Measured by Self-Mixing Interferometry


Abstract:

Laser ablation is the basis of most of the laser micromachining processes. Depending on the pulse duration, wavelength, intensity of the beam, as well as the material typ...Show More

Abstract:

Laser ablation is the basis of most of the laser micromachining processes. Depending on the pulse duration, wavelength, intensity of the beam, as well as the material type, material removal may occur in the form of vaporization, melt expulsion, or direct sublimation. Most commonly material removal is accompanied by a plume formation. The characteristics of the plume can be analyzed to assess the ablation performance. Non-invasive optical methods for the purpose can be further exploited in industrial laser micromachining applications, if opportunely designed and implemented. This work uses an interferometric approach to investigate the optical path changes induced by the ablation plume formed during the laser percussion drilling of different metallic and ceramic materials. A self-mixing interferometer is installed inline to a laser micromachining setup composed of a ns-pulsed green fiber laser.
Date of Conference: 10-13 September 2018
Date Added to IEEE Xplore: 29 November 2018
ISBN Information:
Conference Location: Palermo, Italy

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