Proposal for laser on self-terminating transition in blue spectral range on indium atom transition at 451.1 nm

Abstract

Results of experimental investigation aimed on the use of indium atom transition at 451.1 nm for creation of an effective blue laser on self-terminating transition are presented. The emission spectra of the InI/Ne mixture excited by high-voltage discharge and also the absorption measurements are recorded and discussed. The experiment indicates that the above-mentioned line is the most intensive atomic indium-emitted transition excited by electron impact during the current pulse. All spectra are similar in its essential details independent of discharge pulses recurrence frequency. The atomic indium resonance line at 410.2 nm is located within the X–A absorption band of initial InI molecule. Not sufficiently low ratio of the metastable to ground states concentration of ∼10 −2 is the main reason that the stimulated emission was not observed.