Shadowgraphic and interferometric investigations on Nd:YAG laser-induced vapor/plasma plumes for different processing wavelengths

Detlef Breitling; Henrik Schittenhelm; Peter Berger; Friedrich Dausinger; Helmut Huegel

doi:10.1117/12.413994

25 January 2001 Shadowgraphic and interferometric investigations on Nd:YAG laser-induced vapor/plasma plumes for different processing wavelengths

Detlef Breitling, Henrik Schittenhelm, Peter Berger, Friedrich Dausinger, Helmut Huegel

Author Affiliations +

Proceedings Volume 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (2001) https://doi.org/10.1117/12.413994
Event: XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, 2000, Florence, Italy

Abstract

Shadowgraphic and interferometric analysis of vapor/plasma plumes generated by pulses of a ns-Nd:YAG laser display a distinctive morphology for each of three different processing wavelengths (1064 nm, 532 nm, and 355 nm). Analytical models of shock wave expansion can be applied to determine the total energy stored within the plumes. Electron density distribution measurements reveal the regions of absorption and, using a simple model of inverse bremsstrahlung and photoionization, allow us to estimate absorption coefficients.

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Detlef Breitling, Henrik Schittenhelm, Peter Berger, Friedrich Dausinger, and Helmut Huegel "Shadowgraphic and interferometric investigations on Nd:YAG laser-induced vapor/plasma plumes for different processing wavelengths", Proc. SPIE 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (25 January 2001); https://doi.org/10.1117/12.413994

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