Green and red up-conversions in co-doped Ersup(3+)/Ybsup(3+) telluride fibers pulled from bulk glasses
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2008
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ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 31.
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Glasses based on TeO2 are transparent in the visible, near and middle infrared regions; the position of
the IR cut-off may be shifted towards longer wavelength as heavier ions enter the glass composition in binary
and ternary systems. Tellurite glasses have low phonon energy and nonlinear optical properties because of the
high refractive index (∼2.0). The low phonon energy and high refractive index yield low nonradiative decay
rates and high radiative emission rates of rare-earth energy levels, as a result, these glasses can provide more
efficient up-conversion luminescence intensities. In particular TeO2-ZnO-Nb2O5 glasses have a transmission
window ranging from 0.36 µm to 6.5 µm and phonon energy of 700 cm−1
, similar to germanate glasses but
lower than silicate (1100 cm−1
) and phosphate (1200 cm−1
). Another essential property of telluride glasses is
the suitability to be fibered.
Er3+ doped glasses have attracted much interest due to their important optical properties for use in lasers,
photonic devices and other communications devices. When 980 nm laser diodes were developed, these interests
were stimulated, from the application point of view. The spectral region of the 2F7/2 → 2F5/2 transition of the
Yb3+ ion overlaps that of the 4
I15/2 → 4
I11/2 transition of the Er3+ ion, and it becomes possible to achieve an
effective Yb3+ to Er3+ transfer mechanism of the excitation energy.
We produce and characterize two samples of Er3+/Yb3+ co-doped telluride glasses with 0.5 wt% of Er2O3
and 1 wt% for the first sample and 5 wt% of Yb2O3 for the second one and then we pulled fibers from this
bulks. As a result we observe an increase of the green and red up-conversion intensities when the concentration
of Yb3+ increases in the bulks and the same occurred in the fibers.
Como referenciar
JAKUTIS NETO, JONAS; WETTER, NIKLAUS U.; AMANCIO, CARLOS T.; KASSAB, LUCIANA R.P. Green and red up-conversions in co-doped Ersup(3+)/Ybsup(3+) telluride fibers pulled from bulk glasses. In: ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 31., 5-9 de maio, 2008, Aguas de Lindoia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/19166. Acesso em: 30 Dec 2025.
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