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Non-radiative relaxation of Ho3+ in various tellurite glasses

✍ Scribed by J. Hormadaly; R. Reisfeld

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
353 KB
Volume
45
Category
Article
ISSN
0009-2614

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✦ Synopsis

Non-radiative relaxation rates from 5Fa, 5Sz to 5Fs of Ho3+ _ m three tellurite glasses were measured as a function of temperature. The expcrlmental behaviour of the nonradiative decay rate IV&") with temperature lies between two theoretical curves fitted to 4 and 5 phonons. Phonon frequencies were obtained from Raman measurements, a correlation was founG between the magnitude of Wnr(0) and the amount of disorder in glass.

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Time evolution of the 'Fd, 'S2 -+ s 18 fh~orescence of HoB-doped zinc telhrrite glasses was studied from 37 10 3fJO K. The time needed to achieve equilibrium between \*r;4 and 'Sz states is 0.6 ps. Multiphonon reJ;lxstion from 'F+, sSz and SFs levels of Ho3+ in zinc t&&e was studied. Two ?ypcs of ph