Measuring by laser Doppler vibrometry the recoil momentum of biological tissue under infrared laser ablation

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

doi:10.1117/12.307743

1 June 1998 Measuring by laser Doppler vibrometry the recoil momentum of biological tissue under infrared laser ablation

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

Author Affiliations +

Proceedings Volume 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1998) https://doi.org/10.1117/12.307743
Event: Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1998, Ancona, Italy

Abstract

The recoil momentum of hard tissue induced by pulsed IR laser exposure was measured in a pendulum experiment using laser Doppler vibrometry. For the experiments bone was irradiated by holmium:YAG laser radiation and dentin by a superpulsed CO₂ laser. Since the initial masses of the samples were known and the ablated masses were measured, this method allowed also 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 technical realization as well as the limitations of the method is discussed; furthermore laser parameters are pointed out which induce critical acceleration risking serious damage to sensitive organs.

Citation Download Citation

Thomas G. Barton, Hans-Jochen Foth, Dirk H. Meyer, and Adriaen Postel "Measuring by laser Doppler vibrometry the recoil momentum of biological tissue under infrared laser ablation", Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); https://doi.org/10.1117/12.307743

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