Laser beam deflection as a probe of laser ablation of materials
- 4 December 1989
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 55 (23), 2435-2437
- https://doi.org/10.1063/1.102293
Abstract
Helium-neon laser beam deflection is used to study excimer laser ablation of polymers and a YBa2 Cu3 O7−x superconductor. Density gradients above pulsed laser heated or ablated samples deflect the He-Ne laser beam and this is measured using a position sensitive detector. The technique permits the determination of the laser fluence threshold for ablation both in a vacuum and in air, and the velocity of the ablation products in a vacuum. A model of the thermal deflection at low fluence was developed which enables measurements of thermal diffusivity of the air.Keywords
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