18 February 2014 Longitudinally excited CO2 laser with short laser pulse for hard tissue drilling
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Proceedings Volume 8929, Lasers in Dentistry XX; 89290L (2014) https://doi.org/10.1117/12.2038325
Event: SPIE BiOS, 2014, San Francisco, California, United States
Abstract
We developed a longitudinally excited CO2 laser that produces a short laser pulse with a circular beam and a low divergence angle. The laser was very simple and consisted of a 45-cm-long alumina ceramic pipe with an inner diameter of 9 mm, a pulse power supply, a step-up transformer, a storage capacitance, and a spark-gap switch. The laser pulse had a spike pulse width of 103 ns and a pulse tail length of 32.6 μs. The beam cross-section was circular and the full-angle beam divergence was 1.7 mrad. The laser was used to drill ivory samples without carbonization at fluences of 2.3–7.1 J/cm2. The drilling depth of the dry ivory increased with the fluence. The drilling mechanism of the dry ivory was attributed to absorption of the laser light by the ivory.
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Kazuyuki Uno, Hiroyuki Hayashi, Tetsuya Akitsu, Takahisa Jitsuno, "Longitudinally excited CO2 laser with short laser pulse for hard tissue drilling", Proc. SPIE 8929, Lasers in Dentistry XX, 89290L (18 February 2014); doi: 10.1117/12.2038325; https://doi.org/10.1117/12.2038325
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