EXCITED STATE ABSORPTION FROM METASTABLE STATES OF IONS IN CRYSTAL.
JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF PHYSICS
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A spectrometer system for studying optical absorption from metastable states of ions in crystal is described. Absorption cross sections for excited state absorption from the metastable 2E state in Al2O3Cr3 were measured at temperatures of 300K, 105K and 40K in the wavelength region from 2300A to 7100A. The excited state population was obtained at 105K and 40K by using the vibronics of the 4T2 ground state absorption band. Excited state absorption from the 2E state was observed in MgOCr3 with a strong peak at 2800A. Strong excited state absorption bands were found near 4750A, 3170A, 2850A and 2470A of a pumped SrF2Sm2 crystal and near 4750A, 3280A, 2740A and 2470A of a pumped SrCl2Sm2 crystal. These bands were explained to be transitions from 5Do4f6 to higher quintet states of 4f55d configuration. Author
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy
- Solid State Physics