Abstract

Measurements of absorption and excitation spectra for Nd3+ in soda-lime silicate glass, CaWO4, and Y3Al2(AlO4)3 (YAG) are presented. The relative quantum efficiency for F432I411/2 fluorescence is evaluated for principal absorptions over the wavelength range 3250–9300 Å. For the crystals, quantum efficiency is found to be independent of the level pumped, to within ±12% for CaWO4 and ±13% for YAG. Except for slight quenching of levels between 4000 and 5500 Å, quantum efficiency for the glass sample is independent of pumping level to within ±5%. These results indicate that the efficiency of each step in the process which populates the F432 level is near unity. Also, over the range of structures investigated, relative Nd3+ quantum efficiency appears to be independent of the details of crystal-field structure.

© 1967 Optical Society of America

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