Momentum transfer in laser-induced ablation of hard tissue measured by laser Doppler vibrometry

Hans-Jochen Foth; Thomas G. Barton; Dirk H. Meyer; Adriaen Postel

doi:10.1117/12.312293

1 July 1998 Momentum transfer in laser-induced ablation of hard tissue measured by laser Doppler vibrometry

Hans-Jochen Foth, Thomas G. Barton, Dirk H. Meyer, Adriaen Postel

Proceedings Volume 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII; (1998) https://doi.org/10.1117/12.312293
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

A laser Doppler vibrometer was used in a pendulum experiment to measure the recoil momentum induced in hard tissue by pulsed infrared laser exposure. A Holmium:YAG laser was irradiated at bone and a superpulsed CO₂ laser irradiated at dentin. Since the masses of the samples were known and the ablated masses were measured, this method allowed an indirect determination of the velocity of the ablated particles. In a second experiment performed with the CO₂ laser the velocities of the ablated particles were measured directly by the time of flight detected by the laser beam of the vibrometer. The results of both methods are in good agreement; at a mean power of 0.5 Watt of the CO₂ laser the velocity was 50 - 60 m/s increasing at higher mean powers.

Citation Download Citation

Hans-Jochen Foth, Thomas G. Barton, Dirk H. Meyer, and Adriaen Postel "Momentum transfer in laser-induced ablation of hard tissue measured by laser Doppler vibrometry", Proc. SPIE 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII, (1 July 1998); https://doi.org/10.1117/12.312293

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