Longitudinally Excited CO2 Laser with Short Laser Pulse like TEA CO2 Laser

  • Kazuyuki Uno
  • Kenshi Nakamura
  • Tatsumi Goto
  • Takahisa Jitsuno


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.


Longitudinal excitation CO2 laser Tooth processing Glass marking 

PACS number




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.


  1. 1.
    J. W. Bethel, H. J. Baker, and D. R. Hall, Opt. Commun. 125, 352–358 (1998).CrossRefGoogle Scholar
  2. 2.
    K. M. Abramski, A. D. Colley, H. J. Baker, and D. R. Hall, Appl Phys Lett 54, 1833–1835 (1989).CrossRefGoogle Scholar
  3. 3.
    J.-L. Lachambre, J. MacFarlane, G. Otis, and P. Lavigne, Appl. Phys. Lett. 32, 652–653 (1978).CrossRefGoogle Scholar
  4. 4.
    P. Raote, G. Patil, M. B. S. Prasad, J. P. Nilaya, and D. J. Biswas, Opt. Commun. 281, 2213–2217 (2008).CrossRefGoogle Scholar
  5. 5.
    D. J. Biswas, J. P. Nilaya, and A. Kumar, Opt. Commun. 248, 521–526 (2005).CrossRefGoogle Scholar
  6. 6.
    J. P. Nilaya and D. J. Biswas, Rev. Sci. Instrum. 71, 579–578 (2000).CrossRefGoogle Scholar
  7. 7.
    K. R. Rickwood and J. Macinnes, Rev. Sci. Instrum. 53, 1667–1669 (1982).CrossRefGoogle Scholar
  8. 8.
    N. Menyuk and P. F. Moulton, Rev. Sci. Instrum. 51, 216–220 (1980).CrossRefGoogle Scholar
  9. 9.
    M. A. El-Osealy, T. Ido, K. Nakamura, T. Jitsuno, and S. Horiguchi, Opt. Commun. 194, 191–199 (2001).CrossRefGoogle Scholar
  10. 10.
    M. A. M. El-Osealy, T. Jitsuno, K. Nakamura, and S. Horiguchi, Opt. Commun. 205, 205–377 (2002).Google Scholar
  11. 11.
    M. A. M. El-Osealy, T. Jitsuno, K. Nakamura, Y. Uchida, and T. Goto, Opt. Commun. 207, 255–259 (2002).CrossRefGoogle Scholar
  12. 12.
    K. Uno, K. Nakamura, T. Goto, and T. Jitsuno, Jpn. J. Appl. Phys. 45, 1651–1653 (2006).CrossRefGoogle Scholar
  13. 13.
    H.-J. Chung, D.-H. Lee, J.-H. Hong, J.-H. Joung, Y.-M. Sung, S.-J. Park, and H.-J. Kim, Rev. Sci. Intstrum. 73, 484–485 (2002).CrossRefGoogle Scholar
  14. 14.
    D.-H. Lee, H.-J. Chung, and H.-J. Kim, Rev. Sci. Intstrum. 71, 577–578 (2000).CrossRefGoogle Scholar
  15. 15.
    M. M. T. Loy and P. A. Roland, Rev. Sci. Intstrum. 48, 554–556 (1977).CrossRefGoogle Scholar
  16. 16.
    T.-J. Wang, J.-Y. Gao, Q.-Y. He, T. Ma, Y. Jiang, and Z.-H. Kang, J. Appl. Phys. 98, 073102 (2005).CrossRefGoogle Scholar
  17. 17.
    R. Meucci, M. Ciofini, and P.-Y. Wang, Opt. Commun. 91, 444–452 (1992).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Kazuyuki Uno
    • 1
    • 2
  • Kenshi Nakamura
    • 3
  • Tatsumi Goto
    • 4
  • Takahisa Jitsuno
    • 1
  1. 1.Institute of Laser EngineeringOsaka UniversityOsakaJapan
  2. 2.Interdisciplinary Graduate School of Medicine and EngineeringUniversity of YamanashiYamanashiJapan
  3. 3.Kobe Shinwa Women’s UniversityKobeJapan
  4. 4.YokohamaJapan

Personalised recommendations