Accession Number : ADA322009

Title :   Spectroscopic Studies and Laser Operation of Pr,Mg:SrAl12O19,

Descriptive Note : Summary rept. Jun 93-Feb 96,

Corporate Author : ARMY RESEARCH LAB ADELPHI MD

Personal Author(s) : Merkle, Larry D. ; Zandi, Bahram ; Moncorge, Richard ; Guyot, Yannick ; Verdun, Horacio R.

PDF Url : ADA322009

Report Date : FEB 1997

Pagination or Media Count : 28

Abstract : Pr(3+)-doped SrAl12O19 has been investigated spectroscopically as a visible laser material. Its (3)P sub 0 fluorescence lifetime is rather long for an oxide: about 35 microseconds. This excited state exhibits only mild concentration and temperature quenching, so that concentrations high enough to give good ground-state absorption into the (3)P sub 1 manifolds still give strong, long-lived emission. Ground-state absorption into the 4f5d configuration begins at relatively high energy, so that excited-state absorption into this configuration is less likely to be significant at laser wavelengths in SrAl12O19 than in many other oxides, such as Y3Al5O12. The stimulated emission cross sections of major emission lines have been estimated, and are quite reasonable for laser operation. Laser-pumped laser operation has been demonstrated in the red (3)P sub 0(right arrow) (3)F sub 2) at room temperature and in the blue-green ((3)P sub 0(right arrow)(3)H sub 4) at cryogenic temperatures.

Descriptors :   *SPECTROSCOPY, *LASERS, *LASER MATERIALS, *PRASEODYMIUM COMPOUNDS, FREQUENCY, LASER PUMPING, MAGNESIUM, LOW TEMPERATURE, STIMULATION(GENERAL), FLUORESCENCE, EXCITATION, EMISSION SPECTRA, QUENCHING, ROOM TEMPERATURE, HIGH ENERGY, OXIDES, ALUMINUM, CROSS SECTIONS, VISIBILITY, LONG LIFE, GROUND STATE, ABSORPTION, ENERGY LEVELS, STRONTIUM, CRYOGENICS.

Subject Categories : Inorganic Chemistry
      Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE