Oscillation and gain characteristics of longitudinally excited VUV F2 laser at 40 Torr total pressure

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

“…Here, we focus on the longitudinal excitation scheme for a simple and inexpensive device [9][10][11][12]. In this scheme, the excitation discharge is in the direction of the laser axis, and the electrodes are well separated and have small discharge cross-section.…”

Longitudinally Excited CO2 Laser

“…On the other hand, when the pre-ionization is required in the highpressure operation (> 1 atm), the discharge tube is covered with Al foil (Fig. 5, 6) (El-Osealy et al, 2002b;Uno et al, 2009;Uno et al, 2012a). A corona discharge occurs along the tube wall before the main discharge to serve as pre-ionization.…”

“…In recent years, especially, new gas lasers, for example, a longitudinally excited CO2 laser with short laser pulse like TEA and Qswitched CO2 laser (Uno et al, 2009), a longitudinally excited N2 laser with the same excitation system as an excimer lamp (Uno et al, 2006), and a longitudinally excited F2 laser at low-pressure (total pressure of 40 Torr) (El-Osealy et al, 2002b) have been developed. …”

Note: Longitudinally excited N2 laser with low beam divergence

“…In the longitudinal excitation scheme, the excitation discharge is in the direction of the laser axis. [4][5][6][7][8][9][10] In N 2 lasers, the discharge tube is made of a dielectric pipe with a length of about 10-30 cm and an inner diameter of about 2-5 mm, 4-8 producing a laser beam with a circular cross-section. The length of the discharge tube defines the discharge length, and the inner diameter of the discharge tube defines the discharge cross-section.…”

“…5 In future work, we plan to develop a F 2 laser (157 nm) with high beam quality and high-power UV lasers with high beam quality by using an amplifier with a large discharge tube. [8][9][10] Review of Scientific Instruments is copyrighted by the American Institute of Physics (AIP). Redistribution of journal material is subject to the AIP online journal license and/or AIP copyright.…”