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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).
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Uno et al. (2006) studied this question.
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