Comparison of optical parameters and luminescence between Er{sup 3+}/Yb{sup 3+} codoped phosphate glass ceramics and precursor glasses
Journal Article
·
· Journal of Applied Physics
- Photonics Center, College of Physical Science, Nankai University, Tianjin 300071 (China) and Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin 300457 (China)
- Department of Electronic Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon (Hong Kong)
Er{sup 3+}/Yb{sup 3+} codoped transparent phosphate precursor glasses and glass ceramics have been fabricated and characterized. The formation of ErPO{sub 4} and YbPO{sub 4} nanocrystals was studied using x-ray diffraction. The intensity parameters, the spontaneous radiative transition probabilities, the branching ratios, and the radiative lifetimes of Er{sup 3+} in both glass ceramics and precursor glasses were calculated based on the Judd-Ofelt theory, and the crystallization process in the glass ceramics is confirmed by the optical parameters obtained. Under 975 nm wavelength excitation intense 1.54 {mu}m fluorescence and upconversion luminescence were observed in the glass ceramics, the quantum efficiency of the Er{sup 3+} {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 15/2} transition is 95%, and the transition mechanisms of the upconversion luminescence are due to a two-photon process.
- OSTI ID:
- 21179985
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 104; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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