Visible and near infra-red up-conversion in Tm3+/Yb3+ co-doped silica fibres under 980 nm excitation

David A. Simpson; Keith W. E. Gibbs; Stephen F. Collins; Wilfried Blanc; Bernard Dussardier; Gérard Monnom; Pavel Peterka; Gregory W. Baxter

arXiv · 0809.0229

Visible and near infra-red up-conversion in Tm3+/Yb3+ co-doped silica fibres under 980 nm excitation

David A. Simpson·Keith W. E. Gibbs·Stephen F. Collins·Wilfried Blanc·Bernard Dussardier·Gérard Monnom·Pavel Peterka·Gregory W. Baxter

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Abstract

The spectroscopic properties of Tm3+/Yb3+ co-doped silica fibers under excitation at 980 nm are reported. Three distinct up-conversion fluorescence bands were observed in the visible to near infra-red regions. The blue and red fluorescence bands at 475 and 650 nm, respectively, were found to originate from the 1G4 level of Tm3+. A three step up-conversion process was established as the populating mechanism for these fluorescence bands. The fluorescence band at 800 nm was found to originate from two possible transitions in Tm3+; one being the transition from the 3H4 to 3H6 manifold which was found to dominate at low pump powers; the other being the transition from the 1G4 to 3H6 level which dominates at higher pump powers. The fluorescence lifetime of the 3H4 and 3F4 levels of Tm3+ and 2F5/2 level of Yb3+ were studied as a function of Yb3+ concentration, with no significant energy back transfer from Tm3+ to Yb3+ observed.

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David A. Simpson, Keith W. E. Gibbs, Stephen F. Collins, Wilfried Blanc, Bernard Dussardier, Gérard Monnom, Pavel Peterka, Gregory W. Baxter. 2008-09-01. Visible and near infra-red up-conversion in Tm3+/Yb3+ co-doped silica fibres under 980 nm excitation. https://arxiv.org/abs/0809.0229

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