Cutting and drilling of CVD diamond using a copper vapor laser

Rudimar Riva; B. Christ; Nicolau A. S. Rodrigues; Vladimir Jesus Trava-Airoldi; Evaldo J. Corat

doi:10.1117/12.251195

23 September 1996 Cutting and drilling of CVD diamond using a copper vapor laser

Rudimar Riva, B. Christ, Nicolau A. S. Rodrigues, Vladimir Jesus Trava-Airoldi, Evaldo J. Corat

Proceedings Volume 2789, High-Power Lasers: Applications and Emerging Applications; (1996) https://doi.org/10.1117/12.251195
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

In this work we present the results of CVD-diamond processing using a copper vapor laser. With a self filtering unstable resonator the laser produces an average power of 9 watts in a 3.5 times limited diffraction beam at a 10 KHz repetition rate. The laser beam is focused on the diamond surface using a lens with a 150 mm focal distance producing a spot size of 70 microns. The laser intensity achieves 2 GW/cm² on the focus. Electronic microscopy of the processed samples showed clean cut and drill with the whole diameter coincident to the laser beam spot size. Since diamond has a very high thermal diffusivity the temperature rise due to the average power would not be enough to promote evaporation, thus it was concluded that the diamond processing is only die to the laser peak power. Diamond burr with 1.0 mm diameter were cut with the same apparatus at a linear velocity of 200 mm/hour showing a clear and shape cut.

Citation Download Citation

Rudimar Riva, B. Christ, Nicolau A. S. Rodrigues, Vladimir Jesus Trava-Airoldi, and Evaldo J. Corat "Cutting and drilling of CVD diamond using a copper vapor laser", Proc. SPIE 2789, High-Power Lasers: Applications and Emerging Applications, (23 September 1996); https://doi.org/10.1117/12.251195

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