Optical properties and energy transfer processes of Ho3+/Er3+- codoped fluorotellurite glass under 1550 nm excitation for 2.0 μm applications

Abstract

Articles you may be interested inEnergy transfer characteristics of silicate glass doped with Er3+, Tm3+, and Ho3+ for 2μm emission Fluorescence properties and energy transfer study of Er3+/Nd3+ doped fluorophosphate glass pumped at 800 and 980 nm for mid-infrared laser applications J. Appl. Phys. 111, 073503 (2012); 10.1063/1.3699059 Enhanced effect of Ce3+ ions on 2 μm emission and energy transfer properties in Yb3+/Ho3+ doped fluorophosphate glasses J. Appl. Phys. 109, 083535 (2011); 10.1063/1.3569855 2.05 µm emission properties and energy transfer mechanism of germanate glass doped with Ho3+, Tm3+, and Er3+ J. Appl. Phys. 109, 053503 (2011); 10.1063/1.3553877 2.0 μ m emission properties and energy transfer processes of Yb 3 + / Ho 3 + codoped germanate glassThis paper investigates 2.0 lm emission properties and energy transfer processes in the Er 3þ /Ho 3þ codoped fluorotellurite glass. The measured absorption spectra demonstrate that the codoped sample can be pumped by 1550 nm excitation efficiently. Judd-Ofelt and radiative parameters are calculated and discussed. Intensive 2.0 lm emission originating from Ho 3þ : 5 I 7 ! 5 I 8 transition is observed and a long lifetime (11 ms) of the 5 I 7 level is measured when Ho 3þ ions are sensitized by Er 3þ ions. Meanwhile, the upconversion spectra of the Er 3þ singly and codoped samples are obtained and the energy transfer processes of the two ions is discussed based on the change of the upconversion emissions. The microscopic interaction parameters of the phonon-assisted (Er 3þ : 4 I 13/2 !Ho 3þ : 5 I 7 ) process are calculated and the microparameter reaches as high as 10.1 Â 10 À41 cm 6 /s. Hence, these results indicate that this Ho 3þ /Er 3þ codoped fluorotellurite glass will be a suitable material for developing solid state laser around 2.0 lm. V C 2014 AIP Publishing LLC.

Quantitative Analysis of Energy Transfer and Origin of Quenching in Er3+/Ho3+ Codoped Germanosilicate Glasses

“…Reports on 2 µm emissions of Er 3+ /Ho 3+ codoped systems are less and they are mainly focused on the investigation of spectroscopic properties 14 . Therefore, the knowledge and quantification of energy transfer mechanism between Ho 3+ and Er 3+ based on the built rate equation model and phonon assisted energy transfer analysis is helpful to optimize and assure the technological applications of the codoped materials.…”

Novel Er3+/Ho3+‐codoped glass‐ceramic fibers for broadband tunable mid‐infrared fiber lasers

“…Based on the energy‐transfer mechanism between Er 3+ and Ho 3+ , many efforts have been devoted to the research of MIR emission in Er 3+ /Ho 3+ ‐codoped glass matrices, for example, fluoride and oxide glasses . Although with widely tunable MIR emission, they all exhibit their intrinsic weaknesses.…”

“…Based on the energy-transfer mechanism between Er 3+ and Ho 3+ , many efforts have been devoted to the research of MIR emission in Er 3+ /Ho 3+ -codoped glass matrices, for example, fluoride and oxide glasses. [6][7][8][9] Although with widely tunable MIR emission, they all exhibit their intrinsic weaknesses. The disappointing chemical and thermal performance of fluoride glass limit the output of stable MIR lasers, and the relatively high phonon energy and wide phonon energy distribution of oxide glass make the multiphonon nonradiative energy relaxation very easy to happen.…”

Spectroscopic properties in Er3+-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

“…On one hand, GCs combine the advantages of excellent fiber-drawing ability of glass 7 8 and strong crystal field of nanocrystals 9 10 . On the other hand, tellurite glasses possess wide transmission region (from 0.35 to 5 μm), the lowest phonon energy (~750 cm −1 ) among the common oxide glasses, large refractive index (~2.0), high solubility for rare earth ions and good chemical durability etc 11 12 13 14 . The low phonon energy is very beneficial to the 2.7 μm emission of Er 3+ ions due to the narrow gap between 4 I 11/2 and 4 I 13/2 levels.…”