Fluoride glasses luminescence

Tick et al. (1995) modified this system by adding Znp2 and YF and doping solely with the rare-earth ion Pr (Table 4-12) at the low level of 0.1 mol%. The luminescent quantum efficiency of Pr emission at the 1300 nm telecommunication band was measured at 7%, an improvement over similar Pr emission from the well-known fluoride glass, ZBLAN , measured at 4%. These glass-ceramics... 

From the point of view of luminescent behavior, the cascading down between eight excited /-levels of holmium(III) in ZBLA glass is one of the most spectacular effects in fluoride glasses (fig. 8). The multiphonon relaxation being... 

Reisfeld, R., Eyal, M., Greenberg, E., and Jorgensen, C.K. (1985) Luminescence of six /-levels of holmium(III) in barium zirconium fluoride glass at room temperature. Chem. Phys. Lett, 118, 25-28. 

B. Boulard, O. Peron, Y. Jestin, M. Ferrari, C. Duverger-Arfuso, Y. Gao, Characterizations of Er +-doped fluoride glass ceramics waveguides containing LaF3 nanocrystals, to be published in J. Luminescence, 129, 1637-1640 (2009). 

Fig. 3. Dependence of multiphonon relaxation on the number of phonons in the glass former needed to bridge the energy gap between the luminescent /-level and the closest lower-lying level. The curves refer to glasses of the following types (1) phosphate (2) borate (3) silicate (4) tellurite (5) fluoroberyllate (6) germanate (7) zirconium fluoride (ZBLA) (8) aluminum lanthanide sulfide (ALS) and gallium lanthanide sulfide (GLS) (9) the crystalline hosts YjAljOj CYAG), and (10)...

Glasses are usually non-stoichiometric mixtures (excepting molten NaP03) of differing oxides forming borates, silicates, phosphates,. .. or, under more special circumstances, mixed fluorides The narrow absorption and luminescence... 

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