Accession Number : ADA214146

Title :   Development of Glass - Ceramic Lasers.

Descriptive Note : Final rept. 1 Feb 86-31 May 89,

Corporate Author : BOSTON UNIV MA DEPT OF CHEMISTRY

Personal Author(s) : Lempicki, A. ; Keyes, T. ; Wojtowicz, A. J. ; Kazmierczak, M. ; Chen, J. J.

Report Date : AUG 1989

Pagination or Media Count : 195

Abstract : The goal of this program was to ascertain the possibility of developing a Tunable Solid State Laser, based on Cr - doped transparent glass - ceramics. To this end the spectroscopy of Cr in mullite ceramics and related aluminosilicate crystals was studied in detail. The results indicate an extremely large inhomogenous broadening, interpreted in terms of a statistical distribution of crystal fields. The main limitation of these materials is the high scattering loss which should be reduced by at least a factor of 10, before laser applications are contemplated. Work on scattering led to the discovery of un-averaged, angularly distributed intensity fluctuations in amorphous materials. This work was carried out on CVD silica as well as on ceramics and led to new insights concerning the statistics of speckle phenomena. Keywords: Laser materials; Tunable solid-state lasers; Spectroscopy; Chromium glass doping; Chemical vapor deposition; Transparent ceramics; Light scattering from amorphous solids; Speckle; Backscattering. (EDC)

Descriptors :   *CERAMIC MATERIALS, *GLASS, *LASER MATERIALS, *SOLID STATE LASERS, *TUNABLE LASERS, AMORPHOUS MATERIALS, BACKSCATTERING, CHEMICAL REACTIONS, CHROMIUM, CRYSTALS, DISTRIBUTION, DOPING, INTENSITY, LASER APPLICATIONS, LASERS, LIGHT SCATTERING, LIMITATIONS, LOSSES, SILICON DIOXIDE, SOLIDS, SPECTROSCOPY, SPECULAR REFLECTION, STATISTICAL DISTRIBUTIONS, STATISTICS, TRANSPARENCE, VAPOR DEPOSITION, VARIATIONS.

Subject Categories : Lasers and Masers
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE