Frequency upconversion properties of Er{sup 3+}/Yb{sup 3+}-codoped lead-germanium-bismuth oxide glasses
- Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)
The frequency upconversion properties of Er{sup 3+}/Yb{sup 3+}-codoped heavy metal oxide lead-germanium-bismuth oxide glasses under 975 nm excitation are investigated. Intense green and red emission bands centered at 536, 556 and 672 nm, corresponding to the {sup 2}H{sub 11/2} {sup {yields}} {sup 4}I{sub 15/2}, {sup 4}S{sub 3/2} {sup {yields}} {sup 4}I{sub 15/2} and {sup 4}F{sub 9/2} {sup {yields}} {sup 4}I{sub 15/2} transitions of Er{sup 3+}, respectively, were simultaneously observed at room temperature. The influences of PbO on upconversion intensity for the green (536 and 556 nm) and red (672 nm) emissions were compared and discussed. The optimized rare earth doping ratio of Er{sup 3+} and Yb{sup 3+} is 1:5 for these glasses, which results in the stronger upconversion fluorescence intensities. The dependence of intensities of upconversion emission on excitation power and possible upconversion mechanisms were evaluated and analyzed. The structure of glass has been investigated by means of infrared (IR) spectral analysis. The results indicate that the Er{sup 3+}/Yb{sup 3+}-codoped heavy metal oxide lead-germanium-bismuth oxide glasses may be a potential materials for developing upconversion fiber optic devices.
- OSTI ID:
- 20895250
- Journal Information:
- Materials Research Bulletin, Vol. 41, Issue 8; Other Information: DOI: 10.1016/j.materresbull.2006.01.027; PII: S0025-5408(06)00052-3; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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