Transition-metal ions in Nd-doped glasses: spectra and effects on Nd fluorescence
We have measured transition-metal ion (Ti, V, Cr, Mn, Fe, Co, Ni, Cu) spectra and their effects on Nd fluorescence quenching in Nd-doped phosphate and silicate glasses. Our purpose was to determine the maximum allowable impurity content given particular limits on the absorption loss at 1053 nm and the Nd fluorescence quenching rate. To keep the absorption loss <0.1 m/sup -1/ the transition-metal impurity content should be kept below 0.5 ppMw. To keep the increase in the Nd fluorescence decay rate below 1%, the impurity content should be <3 ppMw. We have also found that the Nd quenching rates do not scale as predicted by the Forster-Dexter dipole-dipole energy transfer theory if we assume that the dominant variation with transition metal is the overlap integral of the Nd fluorescence spectrum and the transition-metal absorption. We suggest that phonon-assisted energy transfer to transition metals is effective in quenching Nd. We find that quenching rates increase 1.5 to 4 times as the Nd concentration increases from 0.5 to 10 x 10/sup 20/ cm/sup -3/.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA); Schott Glass Technologies, Inc., Duryea, PA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6369427
- Report Number(s):
- UCRL-92842; CONF-851217-49; ON: DE86006676
- Resource Relation:
- Conference: Materials Research Society meeting, Boston, MA, USA, 2 Dec 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
NEODYMIUM LASERS
LASER MATERIALS
ABSORPTION SPECTRA
CHROMIUM
COBALT
COPPER
FLUORESCENCE
GLASS
IRON
MANGANESE
NEODYMIUM PHOSPHATES
NEODYMIUM SILICATES
NICKEL
PHOSPHATE GLASS
QUENCHING
TITANIUM
VANADIUM
ELEMENTS
LASERS
LUMINESCENCE
MATERIALS
METALS
NEODYMIUM COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RARE EARTH COMPOUNDS
SILICATES
SILICON COMPOUNDS
SOLID STATE LASERS
SPECTRA
TRANSITION ELEMENTS
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420300 - Engineering- Lasers- (-1989)