An Investigation of Laser Induced Surface Damage in glass.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Laser-induced plasma surface damage in a transparent dielectric is investigated. The possible occurrence of unipolar arcing as a damage mechanism in non-conductors is examined. Experiments were conducted using a neodymium glass laser in a Q-switched mode to create a hot plasma. The plasma damage on both entrance and exit surfaces was examined. The morphology of damage is qualitatively analyzed. Several theories are applied in explanation of the damage obtained. The appearance of micropitting at the periphery of the laser impact area of the targets indicates the possible occurrence of unipolar arcing as a damage mechanism. Other damage mechanisms include thermal stress, electron avalanche, particle deposition, and micropitting from particle inclusions or surface imperfections. Originator supplied keywords include Laser glass.
- Lasers and Masers
- Ceramics, Refractories and Glass
- Plasma Physics and Magnetohydrodynamics