Upconversion photon quantification of Ho3+ in highly transparent fluorotellurite glasses

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)8-14
Journal / PublicationOptics and Laser Technology
Online published19 May 2018
Publication statusPublished - Nov 2018


Multi-photon-excited green, red and oxblood UC emissions have been quantified in highly transparent Ho3+/Yb3+ doped fluorotellurite (BALMT) glasses under the excitation of 977 nm laser. The net powers of green, red and oxblood emissions are determined to be 88.1, 103.8 and 66.1 μW in 0.196% Ho2O3 and 0.752% Yb2O3 co-doping case under the excitation power of 870 mW, and the net emission photon numbers are identified to be 242.7 × 1012, 342.8 × 1012 and 250.8 × 1012 cps. The quantum yields (QYs) and luminous fluxes for visible UC emissions of Ho3+ are identified as a positive dependency with pumping powers, and when the excitation power density increase to 110.8 W/mm2, the QY values for 550 nm green, 650 nm red and 753 nm oxblood UC emissions are up to 0.63 × 10−4, 0.90 × 10−4 and 0.65 × 10−4, respectively. The values of QY in Ho3+ doped BALMT glass are one order of magnitude larger than that in NMAG glasses. The macroscopic quantization for UC photon generation from Ho3+ in low-phonon fluorotellurite glasses provides a reliable reference for developing compact high-power-density illuminant for remote sensing, radar detection and medical diagnosis.

Research Area(s)

  • Highly transparent fluorotellurite glass, Multi-photon excitation, Photon quantification of Ho3+

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