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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This paper may be cited as follows:

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