Boiling process in PMMA irradiated by CO2, DF and HF laser radiations

Rene C. Joeckle; Gerard Rapp; Andre Sontag

doi:10.1117/12.25988

1 February 1991 Boiling process in PMMA irradiated by CO2, DF and HF laser radiations

Rene C. Joeckle, Gerard Rapp, Andre Sontag

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25988
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

When irradiated by a low fluence IR laser radiation, a PMMA plate becomes mat. The damage results from the in-depth absorption of the laser light, which yields a microscopic boiling process. The aspect of the trapped bubbles shows the importance of the absorption depth, which varies with the lasers taken into account (CO2, DF and HF). The threshold of this boiling process has been measured as a function of the incident power density for the three lasers considered. The behaviour is conduction-dominated in the case of the C02 laser radiation and absorption-dominated in the case of the DF and HF laser radiations.

Citation Download Citation

Rene C. Joeckle, Gerard Rapp, and Andre Sontag "Boiling process in PMMA irradiated by CO2, DF and HF laser radiations", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25988

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