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Title: Mid-infrared emission and quantitative analysis of energy transfer processes in Er{sup 3+} doped oxyfluogermanate glasses

Abstract

Oxyfluogermanate glasses with good thermal stability were prepared by melt-quenching method. The investigation of 2.7 μm fluorescence spectra and energy transfer mechanism was performed pumped by an 808 nm laser diode. The 2.7 μm radiative transition probability and emission cross section are 32.62 s{sup −1} and 12.88 × 10{sup −21} cm{sup 2}, respectively. The energy transfer parameters between {sup 4}I{sub 11/2} and {sup 4}I{sub 13/2} levels were calculated by Inokuti-Hirayama and Yokota-Tanimoto's model to further elucidate 2.7 μm fluorescent behaviors. It is found that the energy transfer mechanism among Er{sup 3+} is mainly dominated by dipole-dipole interactions. Results indicate that the prepared oxyfluogermanate glass is a promising candidate for mid-infrared laser applications.

Authors:
; ; ; ; ; ;  [1]
  1. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018 (China)
Publication Date:
OSTI Identifier:
22490720
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CROSS SECTIONS; DIPOLES; DOPED MATERIALS; ENERGY TRANSFER; ERBIUM IONS; FLUORESCENCE; FLUORESCENCE SPECTROSCOPY; GLASS; LASERS; PROBABILITY; QUENCHING

Citation Formats

Cai, Muzhi, Zhou, Beier, Wang, Fengchao, Tian, Ying, Zhou, Jiajia, Xu, Shiqing, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn, and Zhang, Junjie, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn. Mid-infrared emission and quantitative analysis of energy transfer processes in Er{sup 3+} doped oxyfluogermanate glasses. United States: N. p., 2015. Web. doi:10.1063/1.4923064.
Cai, Muzhi, Zhou, Beier, Wang, Fengchao, Tian, Ying, Zhou, Jiajia, Xu, Shiqing, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn, & Zhang, Junjie, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn. Mid-infrared emission and quantitative analysis of energy transfer processes in Er{sup 3+} doped oxyfluogermanate glasses. United States. doi:10.1063/1.4923064.
Cai, Muzhi, Zhou, Beier, Wang, Fengchao, Tian, Ying, Zhou, Jiajia, Xu, Shiqing, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn, and Zhang, Junjie, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn. Sun . "Mid-infrared emission and quantitative analysis of energy transfer processes in Er{sup 3+} doped oxyfluogermanate glasses". United States. doi:10.1063/1.4923064.
@article{osti_22490720,
title = {Mid-infrared emission and quantitative analysis of energy transfer processes in Er{sup 3+} doped oxyfluogermanate glasses},
author = {Cai, Muzhi and Zhou, Beier and Wang, Fengchao and Tian, Ying and Zhou, Jiajia and Xu, Shiqing, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn and Zhang, Junjie, E-mail: jjzhang@cjlu.edu.cn, E-mail: shiqingxu@cjlu.edu.cn},
abstractNote = {Oxyfluogermanate glasses with good thermal stability were prepared by melt-quenching method. The investigation of 2.7 μm fluorescence spectra and energy transfer mechanism was performed pumped by an 808 nm laser diode. The 2.7 μm radiative transition probability and emission cross section are 32.62 s{sup −1} and 12.88 × 10{sup −21} cm{sup 2}, respectively. The energy transfer parameters between {sup 4}I{sub 11/2} and {sup 4}I{sub 13/2} levels were calculated by Inokuti-Hirayama and Yokota-Tanimoto's model to further elucidate 2.7 μm fluorescent behaviors. It is found that the energy transfer mechanism among Er{sup 3+} is mainly dominated by dipole-dipole interactions. Results indicate that the prepared oxyfluogermanate glass is a promising candidate for mid-infrared laser applications.},
doi = {10.1063/1.4923064},
journal = {Journal of Applied Physics},
number = 24,
volume = 117,
place = {United States},
year = {Sun Jun 28 00:00:00 EDT 2015},
month = {Sun Jun 28 00:00:00 EDT 2015}
}
  • The influence of fluoride and shielding gas (O{sub 2} or Ar) on the physical and spectroscopic properties of Er{sup 3+} doped TeO{sub 2}-ZnO-ZnF{sub 2} glass system is investigated. The larger electronegativity of F than O accounts for the gradual decrease of refractive index, density, and J-O parameters with increasing ZnF{sub 2}. An analysis on Fourier transform infrared transmission spectra reveals that the absorption coefficient of OH{sup −} around 3 μm as low as 0.247 cm{sup −1} can be achieved when 30 mol% ZnF{sub 2} containing sample is treated with Ar gas during glass melting process. The reduction of OH{sup −}more » groups combined with the low multiphonon relaxation rate (207 s{sup −1}) contributes to the enhanced emissions at 1.5 and 2.7 μm, along with prolonged lifetimes of {sup 4}I{sub 11/2} and {sup 4}I{sub 13/2} levels. A high branching ratio (17.95%) corresponding to the Er{sup 3+}: {sup 4}I{sub 11/2} → {sup 4}I{sub 13/2} transition, the large absorption and emission cross section (0.44 × 10{sup −20} cm{sup 2} and 0.45 × 10{sup −20} cm{sup 2}), and good gain cross section demonstrate that oxyfluoride tellurite glass could be a promising material for a diode-pump 2.7 μm fiber laser.« less
  • An investigation of spectroscopic property and energy transfer process of Er{sup 3+} doped and Er{sup 3+}/Yb{sup 3+} co-doped germanate glasses is presented. The emission cross section of the {sup 4}I{sub 11/2}{yields}{sup 4}I{sub 13/2} transition of Er{sup 3+} doped germanate glass is calculated to be 1.2 x 10{sup -20} cm{sup 2}. The microparameter of energy transfer from Yb{sup 3+}:{sup 2} F{sub 5/2} to Er{sup 3+}:{sup 4}I{sub 11/2} is calculated to be 2.74 x 10{sup -39} cm{sup 6}/s, and that is not phonon dependent in the quasiresonant process. The intensity of the emission around 2.7 {mu}m is enhanced obviously when Er{sup 3+}more » co-doped with Yb{sup 3+}. The excited-state relaxation process of Er{sup 3+} is adequately described by a combination of the Judd-Ofelt model and the energy-gap law. With the exception of {sup 4}I{sub 13/2} and {sup 4}I{sub 11/2} levels, multiphonon relaxation is dominant for all excited states, making it possible to efficiently pump the 1.55 {mu}m {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 15/2} and 2.7 {mu}m {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 11/2} emission by excitation of Yb{sup 3+}:{sup 2}F{sub 5/2} and Er{sup 3+}:{sup 4}I{sub 11/2} at 980 nm.« less
  • A Er{sup 3+}/Tm{sup 3+}/Ho{sup 3+} tri-doped silicate glass with good thermal stability is prepared by melt-quenching method. Efficient ∼2 μm emission is observed under 808 nm laser excitation. It is found that the 2.0 μm emission of Ho{sup 3+} can be enhanced under the excitation at 808 nm by incorporating Er{sup 3+} and Tm{sup 3+}. Based on the measurement of absorption spectra, the Judd–Ofelt intensity parameters, radiation emission probability, and branching ratio are calculated to evaluate the spectroscopic properties simultaneously. The maximum value of emission cross section of Ho{sup 3+} is 3.54 × 10{sup −21} cm{sup 2} at 2008 nm.more » Additionally, the phonon assistance and the micro-parameters in the energy transfer process are quantitatively analyzed by using Dexter model. The energy transfer coefficient from Tm{sup 3+} to Ho{sup 3+} can reach as high as 21.44 × 10{sup −40} cm{sup 6}/s, respectively. The emission property together with good thermal property indicates that Er{sup 3+}/Tm{sup 3+}/Ho{sup 3+} tri-doped silicate glass is a potential kind of laser glass for efficient 2 μm laser.« less
  • Highlights: • Novel Er{sup 3+} doped germanosilicate glasses were synthesized. • Excellent thermal stability and 2.7 μm emission properties were obtained. • High A{sub rad} (33.75 s{sup −1}) and emission cross section (1.90 × 10{sup −20} cm{sup 2}) were achieved. • A reasonable energy transfer mechanism was put forward. - Abstract: 2.7 μm fluorescence has been achieved for the first time in Er{sup 3+} doped novel germanosilicate glasses. Thermal stability, spectroscopic properties and energy transfer mechanism have been investigated in detail. Moreover, the spontaneous transition probability (A{sub rad}) and emission cross section of samples were calculated and analyzed. The preparedmore » Er{sup 3+} doped germanosilicate glasses possessing excellent thermal stability, high A{sub rad} (33.75 s{sup −1}) and emission cross section of 2.7 μm (1.90 × 10{sup −20} cm{sup 2}) provide a new material for the realization of mid-infrared fiber lasers.« less
  • The energy-transfer rate from the Er/sup 3+/ /sup 4/I/sub 13/2/ level to the Tm/sup 3+/ /sup 3/H/sub 4/ level (C/sub 11//sub '/N/sub T/) in BaF/sub 2//ThF/sub 4/ fluoride glass is measured and calculated. The results can be used to determine whether rate equations can be used to predict energy-transfer rates.