Cho, W.J. Kim, M.W. Jo, J.C. Choi, S.S. Park, S.J. 2024-01-21T21:17:23Z 2024-01-21T21:17:23Z 2022-01-10 1994-11 0021-4922 https://pubs.kist.re.kr/handle/201004/145470 The upconversion of 786 nm to visible fluorescence was studied for Tm3+ and Er3+ in both Tm3+-Er3+-codoped and Er3+ singly doped ZrF4-based fluoride glasses for several dopant concentrations. It was found that the addition of Tm3+ enhanced the upconversion efficiencies of the green and the red emission corresponding to the transitions from the4S3/2 and4F9/2 levels of the Er3+ion. The increase in the emission of samples containing 2 mol% TmF3 and 1.5 mol% ErF3 amounted to a factor of about 3 for the green emission and a factor of 300 for the red emission. The 1.48 μm emission from the transition of3F4 to3H4 for the Tm3+ ion decreased with increasing Er3+ concentration. The mechanism of the energy transfer from Tm3+ to Er3+ was discussed. ？ The Japan Society of Applied Physics. English Energy transfer from Tm3+ to Er3+ in zirconiumfluoride glasses pumped by a 786 nm laser diode Article 10.1143/JJAP.33.L1527 1 Japanese Journal of Applied Physics, v.33, no.11A, pp.L1527 - L1529 Japanese Journal of Applied Physics 33 11A L1527 L1529 N scopus 2-s2.0-0028543183 Article Addition reactions Emission spectroscopy Energy transfer Erbium Fluorescence Ions Optical pumping Semiconductor lasers Thulium Dopant Green emission Red emission Upconversion Zirconium fluoride glasses Glass Energy transfer Erbium Fluorescence Thulium Upconversion Zirconiumfluoride glass