Accession Number : AD0806854

Title :   POPULATION INVERSION AND LASER OSCILLATION IN ATOMIC AND MOLECULAR GASES.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN LABS FOR ELECTRONICS AND RELATED SCIENCE RESEARCH

Personal Author(s) : Allen, Raymond B. ; Dougal, Arwin A.

Report Date : 04 JAN 1967

Pagination or Media Count : 253

Abstract : The possibility of obtaining a new class of laser oscillation in the electronic spectra of gaseous molecular ions is investigated. The Franck-Condon principle is used to explain the selective excitation leading to population inversion and laser action for several known molecular neutral laser transitions in nitrogen and carbon monoxide. Based on its usefulness in explaining known molecular neutral laser action, the Franck-Condon principle is employed as a guide in determining which molecular ion transitions should exhibit a population inversion in a gaseous discharge. This approach is shown to indicate that the CO(+) Baldet-Johnson electronic band system is the most likely laser candidate of the seven known transitions in both N2(+) and CO(+). An experimental search for this new class of laser oscillation in the electronic spectra of N2(+) and CO(+) is described. Various rare gas mixtures are used with the prospect of obtaining selective excitation of certain N2(+) and CO(+) levels. The conventional, coaxial, and crossed-field laser discharge tube geometries are employed in this work.

Descriptors :   (*GAS LASERS, EXCITATION), OSCILLATION, NITROGEN, CARBON MONOXIDE, CROSSED FIELD DEVICES, LASERS, HELIUM, NEON, ELECTRON TRANSITIONS, IMPURITIES, DISCHARGE TUBES, ATOMIC ENERGY LEVELS, MOLECULAR ENERGY LEVELS, GROUND STATE, KRYPTON, XENON, IONS.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE