Accession Number : ADA190244

Title :   Alkali Metal Diffuse Band Lasers.

Descriptive Note : Final technical rept. 1 Jun 86-31 May 87,

Corporate Author : IOWA UNIV IOWA CITY

Personal Author(s) : Stwalley, William C

PDF Url : ADA190244

Report Date : 12 Aug 1987

Pagination or Media Count : 19

Abstract : Progress is described on study of a new class of potential excimer lasers based on diffuse bands of the alkali metal vapors. In particular, the violet diffuse bands of sodium vapor and the yellow diffuse bands of potassium vapor have been shown by detailed modeling of single vibrational-rotational level emission to be each composed of overlapping singlet and triplet 'excimer' emission continua of the diatomic molecule. The gain and low absorption loss previously found in the violet and yellow with laser optical pumping of sodium vapor and potassium vapor, respectively, have been quantitatively examined. Prospects for laser oscillation appear to be good at low pressures where quenching is not dominant. Free-bound-free spectra (which include only the triplet portion of the diffuse bands) have been produced and analyzed in sodium, potassium, rubidium and cesium. Keywords: Excimer, Lasers, Singlet.

Descriptors :   *EXCIMERS, *LASERS, CESIUM, DESORPTION, DIATOMIC MOLECULES, DIFFUSION, LASER PUMPING, LOW LOSS, LOW PRESSURE, OPTICAL PUMPING, POTASSIUM, QUENCHING, RUBIDIUM, SODIUM, YELLOW(COLOR), METAL VAPORS, EMISSION SPECTRA, BAND SPECTRA

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE