Longitudinally Excited N₂ Laser Pumped by Lamplike Discharge

Abstract

Nitrogen laser oscillation is observed in a lamplike discharge within a longitudinal excitation tube. The laser consists of a 30-cm-long Pyrex glass tube with an inner diameter of 2.5 mm and a step-up transformer directly coupled to the discharge tube without a high-voltage switch. The excitation is produced by wall-coupled discharge. The laser output energy is 1.7 µJ at 12 Torr (1.6 kPa) and 40 Hz when applying a slow-rising voltage pulse of 37 kV (rise time of 572 ns).

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

“…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. …”

Simple Short-Pulse CO2 Laser Excited by Longitudinal Discharge without High-Voltage Switch

“…CO 2 lasers with a wide variety of excitation schemes have been developed, such as DC discharge [2][3][4], RF discharge [5,6], transverse discharge [7][8][9][10], and longitudinal discharge [11][12][13][14][15][16][17][18].…”