SPECTROSCOPIC CONSIDERATIONS OF CHROMIUM DOPED LITHIUM GERMANATE AS A POSSIBLE LASER MATERIAL.
Abstract
Continuous fluorescence, pulsed fluorescence, and excitation measurements were made on lithium germanate samples containing 0. 038, 0. 12, and 0. 18 percent chromium. The several sharp lines appearing in the fluorescence spectrum are attributed to chromium ions in nonequivalent lattice sites. It appears that these sites are filled randomly as chromium concentration is increased. The temperature dependence of the widths, positions, intensites, and lifetimes were investigated for the two most prominent sets of R lines associated with chromium in nonequivalent sites. These results are interpreted in terms of energy transfer between chromium ions in nonequivalent sites, which is efficient enough at high temperatures to allow thermal equilibrium to be established between the two florescent systems but which predicts pumping of the R system by the R' system at low temperatures. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0676001
Entities
People
- Richard C. Powell
Organizations
- Air Force Cambridge Research Laboratories