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, Kazuyuki Uno, Hiroyuki Hayashi, Hiroyuki Hayashi, Tetsuya Akitsu, Tetsuya Akitsu, Takahisa Jitsuno, 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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