Accession Number : ADA268374


Title :   Spectroscopy of Crystalline, Glass and Ceramic Media Doped with Cobalt and Nickel


Descriptive Note : Final rept. 30 Sep 88-29 Sep 92,


Corporate Author : UNIVERSITY COLL GALWAY (IRELAND) DEPT OF PHYSICS


Personal Author(s) : Glynn, Thomas J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a268374.pdf


Report Date : 03 May 1992


Pagination or Media Count : 104


Abstract : Studies of media doped with Ni, Co, Cr ions, aimed at identifying new materials for tunable laser applications, are presented. With Co 2 +-doping, some new possibilities, based mainly on tetrahedrally-coordinated Co2- ions and emission from higher excited states of octahedrally-coordinated systems, have been documented. The range of Ni2-doped materials studied included MgNb2O6, ZnNb2O6, and Mg2Si04 (in which the luminescence is thermally quenched) and the spinels LiA1508 and ZnAl204 (which show evidence of high Q.E. at room temperature). Excited state absorption measurements will be necessary to assess fully these materials. Cr-doped media, added later to the project brief, included materials doped with Cr3+, Cr4+ (and both). None of the Cr4+-doped samples Y2SiO5, Gd2SiO5, and Ca3(VO4)2 had a luminescence Q.E. comparable to that of forsterite. Two samples doped with Ci3+ ions, BiGaO3 and LaSr2Ga11 020 show some promise for laser applications but their potential region of operation overlaps that already covered by Ti:sapphire. A novel pumping possibility is described for BiGaO3.... Tunable laser media, Optical spectroscopy, Crystalline media doped with Co, Ni, Cr.


Descriptors :   *TUNABLE LASERS , *LASER APPLICATIONS , *DOPING , EMISSION , IONS , LUMINESCENCE , MEDIA , ROOM TEMPERATURE , SPECTROSCOPY , TEMPERATURE


Subject Categories : Lasers and Masers
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE