Evaluation of the most suitable new glass laser medium to incorporate Ytterbium
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Boletim Técnico da Faculdade de Tecnologia de São Paulo
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The most important advantage of Ytterbium
compared to others dopants such as Neodymium is
its broadband emission nature, which is very suitable
for both tunable and ultrafast lasers.
In this paper we present the study and
characterization of three different glass families:
Alkali Niobium Tellurite, Lead Fluoroborate and of
Heavy Metal Oxides, all prepared containing
Ytterbium.
The Ytterbium (Yb) emission spectrum in Tellurite
glass samples was obtained by excitation into the
absorption peak at 975 nm. The Yb peak emission
cross-section was calculated using the fluorescence
lineshape, the radiative lifetime (0.59 ms) and the
refractive index 2.09. With these values we found
the emission cross-section of Yb in Tellurite glass
doped.
Lead Fluorborate glasses have high refractive index
of 2.2, and an absorption band centered at 968nm.
The spontaneous emission probability was
calculated and we determined that it decreases with
the increase of Yb concentration. The same applies
for the fluorescence lifetime and to the emission
cross-section. We measured the fluorescence
lifetime of 0.81ms, and an emission band at 1022nm
with an effective emission linewidth of 60nm.
Heavy metal oxide glass also has high refractive
index (2.5) and transmission cutoff of about 8mm. In
this glass the fluorescence effective linewidth was
86nm and radiative lifetime 300 ms.
Calculations of the minimum pump intensity are also
presented. A comparison of laser properties of these
three different glasses and their importance is shown
and analyzed.
Como referenciar
COURROL, LILIA C.; KASSAB, LUCIANA R.P.; FUKUMOTO, MARCOS E.; GOMES, LAERCIO; WETTER, NIKLAUS U.; VIEIRA JUNIOR, NILSON D.; CASSANJES, FABIA C.; MESSADDEQ, YOUNES; RIBEIRO, SIDNEY J.L. Evaluation of the most suitable new glass laser medium to incorporate Ytterbium: Alkali Niobium Tellurite, Lead Fluorborate or Heavy Metal Oxide. Boletim Técnico da Faculdade de Tecnologia de São Paulo, v. 12, 2002. Disponível em: http://repositorio.ipen.br/handle/123456789/34030. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.