Accession Number : AD0435158

Title :   SOLID STATE LASER EXPLORATIONS.

Descriptive Note : Interim engineering rept. no. 1, 15 Oct 6315 Jan 64,

Corporate Author : RCA LABS PRINCETON N J

Personal Author(s) : Kiss,Z. J. ; Pressley,R. J. ; Sterzer,F. ; Walsh,T. ; Wittke,J. P.

Report Date : 01 FEB 1964

Pagination or Media Count : 49

Abstract : Studies of the excitation of trivalent rare earth ion lasers by cross-pumping in absorption bands associated with color centers in the host crystal were made using ErOF-CaF2. These indicate considerable promise for laser action. Hosts presenting a site of non-cubic symmetry for the fluorescent ions were also investigated. These included SrCl2 and various halofluorides. Such hosts have strong fluorescent transitions of the electric dipole type, and several show strong fluorescence at room temperature. SrCl2, however, shows a strong tendency to cleave under thermal stress. A method of chemically reducing trivalent dysprosium to the divalent state has been found and will be exploited in the futrue. The variation of wavelength and line width with temperature in CaF2:Dy2+ was determined, and this information was applied to several problems concerning laser operation. Frequency shifts of fluorescence and laser output with excitation level were correlated with thermal tuning effects, and threshold measurements with part of the laser crystal shielded were used to gain insight into basic processes. (Author)

Descriptors :   (*LASERS, SOLID STATE PHYSICS), FLUORESCENCE, RARE EARTH ELEMENTS, CALCIUM COMPOUNDS, IMPURITIES, DYSPROSIUM, FLUORIDES, MICROWAVE FREQUENCY, MEASUREMENT, ATOMIC ENERGY LEVELS, SAMARIUM, COLOR CENTERS, ABSORPTION SPECTRA, EXCITATION, STRONTIUM COMPOUNDS, CHLORIDES, CRYSTAL STRUCTURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE