Broadband 1.20 μm emission in Tm3+-doped and Tm 3+/Tb3+, Eu3+ codoped gallogermanate glasses
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
---|---|
Pages (from-to) | 1776-1780 |
Journal / Publication | Optical Materials |
Volume | 34 |
Issue number | 11 |
Online published | 23 May 2012 |
Publication status | Published - Sept 2012 |
Link(s)
Abstract
Broadband 1.20 μm emission originating from the Thulium (Tm 3+): 1G4 → 3H4 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.
In: Optical Materials, Vol. 34, No. 11, 09.2012, p. 1776-1780.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review