Origin of 2.7 {mu}m luminescence and energy transfer process of Er{sup 3+}: {sup 4}I{sub 11/2}{yields}{sup 4}I{sub 13/2} transition in Er{sup 3+}/Yb{sup 3+} doped germanate glasses
Journal Article
·
· Journal of Applied Physics
- Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
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+} 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.
- OSTI ID:
- 22036809
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 111; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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