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Q-switched 1064nm laser source for photomechanical ablation in obsidianus lapis

: Aguilar-Morales, A.I.; Alvarez-Chavez, J.A.; Morales-Ramirez, A.J; Panzner, Michael; Ortega Delgado, Moises Alberto


Hatheway, A.E. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Optomechanical Engineering 2015 : 10 - 12 August 2015, San Diego, California, United States. Part of SPIE optics + photonics
Bellingham, WA: SPIE, 2015 (SPIE Proceedings Series 9573)
ISBN: 978-1-62841-739-5
Paper 95730O
Conference "Optomechanical Engineering" <2015, San Diego/Calif.>
Conference "Optics and Photonics" <2015, San Diego/Calif.>
Fraunhofer IWS ()
laser ablation; light sources; Q-switching

The process of ablation in obsidianus lapis is mainly governed by pulse energy from the laser source and scanning speed. The rate of material ablation is influenced by chemical and physical properties. In this work, laser energy at 1064 nm, has been used for ablation behavior in Q-switch regime. A >40 W, average power Nd:YAG source with pulse energies ranging from 3mJ to nearly 7 mJ, achieved surface damages up to 160 mum of depth. Photo-mechanical ablation in terms of scan speed showed a maximum depth of nearly 500 mum at 130 mm/s. The maximum pulse energy of 12 mJ resulted in ablation of 170 mum depth. Highly efficient ablation in obsidianus lapis for artistic work is an interesting field of application.