Mid-infrared 2.7μm emission properties of Er3+ sensitized by Nd3+ in fluorotellurite glasses

• Published in: Journal of non-crystalline solids 2013-06, Vol.369, p.23-28
• Main Authors: Ma, Yaoyao, Guo, Yanyan, Huang, Feifei, Peng, Yapei, Hu, Lili, Zhang, Junjie
• Format: Article
• Language: English
• Subjects: 2.7 μm; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Fluorotellurite glasses; Fundamental areas of phenomenology (including applications); Glasses (including metallic glasses); Laser materials; Materials science; Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Optics; Physics; Specific materials; Spectroscopic properties
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2013.03.023

Er3+ singly doped and Er3+/Nd3+-codoped fluorotellurite glasses are prepared by melt-quenching method. The Judd–Ofelt intensity parameters (Ωλ,λ=2, 4, and 6), radiative transition rate (Arad), and radiative lifetime (τR) of Er3+ are calculated based on the absorption spectra. The 2.7μm emission spectra of Er3+ ions in fluorotellurite glasses are investigated under 808nm excitation. The enhancement of Er3+ 2.7μm emission shows that Nd3+ can be an effective sensitizer for Er3+: 4I11/2→4I13/2 transition, and the energy transfer efficiency can be as large as 84%. The absorption and emission cross sections are calculated using Füchtbauer–Ladenburg equation and McCumber theory with large values of 1.62×10−20cm2 and 1.11×10−20cm2, respectively. The results suggest that the present glasses have potential applications in 2.7μm laser materials. •Er3+ and Er3+/Nd3+-codoped flourotellurite glasses are fabricated and investigated.•The present glasses show better thermal stability with high △T.•Codoping Nd3+ in present glasses can be an effective way for Er3+ 2.7μm emission.•The emission cross section of the Er3+ 2.7μm in present glasses are larger.•The gain coefficient of the Er3+ 2.7μm in present glasses are larger.