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Title: Spectroscopic analysis on the basis Judd–Ofelt theory of Nd{sup 3+} in (Y{sub 0.985}Nd{sub 0.015}){sub 2}O{sub 3}: A transparent laser-host ceramic

Highlights: • Transparent Y{sub 2}O{sub 3} ceramic with 1.5 atm% doping of neodymium (Nd) was fabricated and its spectroscopic properties were investigated using Judd–Ofelt theory. • The Judd–Oflet parameters, computed from the absorption bands of Nd{sup 3+} ion, are Ω{sub 2} = 8.84 × 10{sup −20} cm{sup 2}, Ω{sub 4} = 9.82 × 10{sup −20} cm{sup 2} and Ω{sub 6} = 4.44 × 10{sup −20} cm{sup 2}. These parameters were used to determine absorption line strength, radiative transition probabilities, fluorescence branch ratio and radiative lifetime for different transitions of Nd{sup 3+}. • The branching ratios for {sup 4}F{sub 3/2} → {sup 4}I{sub 9/2} and {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transition are 0.548 and 0.389, respectively. The spectroscopic quality factor was determined to be 2.21, which is higher than 1.0 atm% neodymium doped Y{sub 2}O{sub 3} ceramic. A calculated radiation decay time (τ = 140 μs) is reasonably close to the experimentally measured life time (153 μs). The life time for 1.5 mol% Nd doped Y{sub 2}O{sub 3} ceramic which is lower than that of 1.0 atm% neodymium doped ceramic. The lowering of life time was attributed to the presence of concentration quenching effects. • The room temperature emissionmore » cross-section for individual Stark bands of {sup 4}F{sub 3/2} → {sup 4}I{sub 9/2} and {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transitions was determined. The total emission cross section for {sup 4}F{sub 3/2} → {sup 4}I{sub 9/2} and {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transition was found to be 25.49 × 10{sup −20} and 37.04 × 10{sup −20} cm{sup 2}, which is significantly higher than 1.0 atm% Nd{sup 3+} doped Y{sub 2}O{sub 3}ceramic. - Abstract: Spectroscopic investigation of 1.5 atm% Nd{sup 3+} doped Y{sub 2}O{sub 3} transparent ceramic was performed for different emission wavelengths. Judd–Oflet parameters, computed from the absorption bands of Nd{sup 3+} ion, are Ω{sub 2} = 8.84 × 10{sup −20} cm{sup 2}, Ω{sub 4} = 9.82 × 10{sup −20} cm{sup 2} and Ω{sub 6} = 4.44 × 10{sup −20} cm{sup 2}. These parameters were used to determine absorption line strength, radiative transition probabilities, fluorescence branch ratio and radiative lifetime for different transitions of Nd{sup 3+}. The branching ratios for {sup 4}F{sub 3/2} → {sup 4}I{sub 9/2} and {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transition are 0.548 and 0.389, respectively. The calculated radiative lifetime (140 μs) is in good agreement with the measured lifetime (153 μs). The room temperature emission cross-section of individual Stark bands of {sup 4}F{sub 3/2} → {sup 4}I{sub 9/2} and {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transitions was determined. The total emission cross section for {sup 4}F{sub 3/2} → {sup 4}I{sub 9/2} and {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transition was found to be 25.49 × 10{sup −20} and 37.04 × 10{sup −20} cm{sup 2}, which is significantly higher than 1.0 atm% Nd{sup 3+} doped Y{sub 2}O{sub 3}ceramic.« less
Authors:
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Publication Date:
OSTI Identifier:
22420722
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 60; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; BRANCHING RATIO; CERAMICS; CONCENTRATION RATIO; CROSS SECTIONS; DOPED MATERIALS; EMISSION SPECTRA; EMISSION SPECTROSCOPY; FLUORESCENCE; LIFETIME; NEODYMIUM; NEODYMIUM IONS; OPTICAL PROPERTIES; TEMPERATURE RANGE 0273-0400 K; YTTRIUM OXIDES