Longitudinally Excited CO2 Laser with Short Laser Pulse like TEA CO2 Laser
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We have developed a longitudinally excited CO2 laser with a short laser pulse similar to that of TEA and Q-switched CO2 lasers. A capacitor transfer circuit with a low shunt resistance provided rapid discharge and a sharp spike pulse with a short pulse tail. Specifically, a circuit with a resistance of 10 M Ω provided a spike pulse width of 103.3 ns and a pulse tail length of 61.9 μs, whereas a circuit with a shunt resistance of 100 Ω provided a laser pulse with a spike pulse width of 96.3 ns and a pulse tail length of 17.2 μs. The laser pulses from this longitudinally excited CO2 laser were used for processing a human tooth without carbonization and for glass marking without cracks.
KeywordsLongitudinal excitation CO2 laser Tooth processing Glass marking
The authors would like to thank Takuya Shimomura (Japan Atomic Energy Agency, Kansai Photon Science Institute) and Yuichi Kanehira (Laser Solutions Co., Ltd.) for their cooperation in the experiments.
- 10.M. A. M. El-Osealy, T. Jitsuno, K. Nakamura, and S. Horiguchi, Opt. Commun. 205, 205–377 (2002).Google Scholar