Broadband 1.20 μm emission in Tm3+-doped and Tm 3+/Tb3+, Eu3+ codoped gallogermanate glasses

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1776-1780
Journal / PublicationOptical Materials
Volume34
Issue number11
Online published23 May 2012
Publication statusPublished - Sept 2012

Abstract

Broadband 1.20 μm emission originating from the Thulium (Tm 3+): 1G43H4 transition was observed in Tm3+-doped gallogermanate glasses under 476.5 nm excitation. The stimulated emission cross-section is calculated to be 2.85 × 10-21 cm2 using the Füchtbauer-Ladenburg approach. Difficulty in the population inversion between the upper 1G4 and lower 3H4 levels resulting from the cross relaxation process Tm3+ [1G4, 3H6] → [ 3H4, 3H5] was overcome by the incorporation of Terbium (Tb3+) and Europium (Eu3+) ions. A Judd-Ofelt analysis was performed based on the absorption spectrum and the derived intensity parameters (Ω2 = 4.65 × 10 -20, Ω4 = 1.51 × 10-20, and Ω6 = 1.42 × 10-20 cm2) reveal a strong asymmetry and covalent environment between Tm3+ ions and ligands in the host matrix. The results indicate that the Tm3+/ Tb3+, Eu3+ codoping scheme is promising in the development of amplifiers and lasers operating at the relatively unexplored 1.2 μm wavelength region. 

Research Area(s)

  • Broadband 1.20 μm emission, Energy transfer, Optical amplification, Tm3+/tb3+, Eu 3+ codoping

Citation Format(s)

Broadband 1.20 μm emission in Tm3+-doped and Tm 3+/Tb3+, Eu3+ codoped gallogermanate glasses. / Zhou, Bo; Tao, Lili; Tsang, Yuen Hong et al.
In: Optical Materials, Vol. 34, No. 11, 09.2012, p. 1776-1780.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review