Cw He-Ne laser radiations induced line emission amplifications at 210 nm.

ABSTRACT: cw He-Ne laser line broadening has been observed in the presence of a doubly ionized species of copper. A microwave system (2.45 GHz) incorporating a quartz argon plasma tube was used. The Ar-plasma helps in producing the ionized species of copper. He-Ne, low output power 0.5 mW, line (632.8 nm) peak intensity was found to decrease linearly with the microwave input power at a rate of 1.566 per W. On the other hand, concurrently the peak intensity of the emission line of Cu2+ at 210 nm exhibited an exclusively preferential increase at a rate of 1.19 per W. In contrast with the 210nm line shape, the He-Ne line broadening is shown to increase with the microwave power. These findings are likely to be envisaged as a two step process. The Cu-species are resonantly excited to the level at either 631.6 or 632.6 nm, followed by a downward transition to the levels 421.2 or 423.0 nm, respectively.