[Table of Contents]

Plasma and Fusion Research

Volume 3, 037 (2008)

Letters

Red-F* Laser and VUV-F2 Emission Pumped at Low Pressure by Longitudinal, Lamp-Like Discharge
Kazuyuki UNO, Kenshi NAKAMURA1), Tatsumi GOTO2) and Takahisa JITSUNO
Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
1)
Kobe Shinwa Women's University, 7-13-1 Suzurandai Kitamachi, Kita-ku, Kobe 651-1111, Japan
2)
Japan Steel Works Ltd., 2-2-1 Hukuura, Kanazawa-ku, Yokohama 236-0004, Japan
(Received 23 October 2007 / Accepted 26 May 2008 / Published 7 July 2008)

Abstract

Red-fluorine-atom (Red-F* ) laser oscillation (λ = 630-780 nm) and strong fluorescence of VUV-F2 emission (λ = 157 nm) are observed in a lamp-like discharge in a longitudinal discharge excitation tube. The laser tube consists of a 30 cm long Pyrex glass pipe with an inner diameter of 2 mm, and a step-up transformer coupled directly to the discharge tube without a high-voltage switch. Excitation is produced by wall-coupled discharge. The laser pulse width is 6.1 ns at 100 Torr (13.3 kPa, with an F2 concentration of 5 %) when a slow-rising voltage pulse of -40 kV (rise time: 253 ns) is applied. VUV-F2 emission of a 24.5 ns (FWHM) pulse width was generated simultaneously with the red-F* laser.

Keywords

gas laser, red-F* laser, VUV-F2 emission, excimer lamp, wall-coupled discharge, longitudinal excitation

DOI: 10.1585/pfr.3.037

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References

  • [1] B. Gellert and U. Kogelschatz, Appl. Phys. B 52, 14 (1991).
  • [2] M. Kakehata, E, Hashimoto, F. Kannari and M. Obara, Appl. Phys. Lett. 56, 2599 (1990).
  • [3] M. Takahashi, K. Maeda, T. Kitamura, M. Takasaki and S. Horiguchi, Opt. Commun. 116, 269 (1995).
  • [4] M.A.M. El-Osealy, T. Jitsuno, K. Nakamura, Y. Uchida and T. Goto, Opt. Commun. 207, 255 (2002).
  • [5] K. Uno, K. Nakamura, T. Goto and T. Jitsuno, Jpn. J. Appl. Phys. 45, 1651 (2006).
  • [6] S. Sumida, M. Obara and T. Fujioka, J. Appl. Phys. 50, 3884 (1979).
  • [7] M. Ohwa and M. Obara, Appl. Phys. Lett. 51, 958 (1987).
  • [8] T. Hatakeyama, F. Kannari and M. Obara, Appl. Phys. Lett. 59, 387 (1991).
  • [9] H. Kumagai and K. Toyoda, Appl. Phys. Lett. 59, 2811 (1991).
  • [10] K. Uno, K. Nakamura, T. Goto and T. Jitsuno (unpublished).

This paper may be cited as follows:

Kazuyuki UNO, Kenshi NAKAMURA, Tatsumi GOTO and Takahisa JITSUNO, Plasma Fusion Res. 3, 037 (2008).