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Energy transfer between manganese(II) and thulium(III) in transition-metal fluoride glasses

✍ Scribed by M. Eyal; R. Reisfield; A. Schiller; C. Jacobani; C.K. Jørgensen

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
672 KB
Volume
140
Category
Article
ISSN
0009-2614

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✦ Synopsis

Lead zinc gallium fluoride glass containing 2 mole% TmFS is shown to luminesce from 'Is (35200 cm-'), 'D, (28000), 'G, (2 1500) and 'Hq ( 12800) to several lower J levels. When the 24 mole% ZnF, is replaced by MnF, in the absence of thulium, the (broad band) quartet-to-sextet (ground state) emission at 16800 cm-' has a mean lifetime of 1 ms. If 2 mole% TmF, is added to the latter glass, energy transfer decreases the lifetime to below 0.03 ms. The high critical radius R. (above 20 A) is rationalized by Mn-Mn energy migration (concomitant with a lifetime shortened from 24 ms) to be compared with J&m 8 A for low Mn(II) con~ntration, almost identical with energy transfer between 1 mole% each of MnF2 and NdFs previously studied in an analogous

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