Absorption intensities and emission cross sections of principal intermanifold and inter-Stark transitions of Er{sup 3+}(4f {sup 11}) in polycrystalline ceramic garnet Y{sub 3}Al{sub 5}O{sub 12}
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249-0697 (United States)
A comparative spectroscopic study is performed on Er{sup 3+}(4f{sup 11}) ions doped in polycrystalline ceramic garnet Y{sub 3}Al{sub 5}O{sub 12} (YAG) and single-crystal laser rod, both containing nominal 50 at. % of Er{sup 3+}. The standard Judd-Ofelt (JO) model is applied to the room-temperature absorption intensities of Er{sup 3+}(4f{sup 11}) transitions in both hosts to obtain the phenomenological intensity parameters. These parameters are subsequently used to determine the radiative decay rates, radiative lifetimes, and branching ratios of the Er{sup 3+} transitions from the upper multiplet manifolds to the corresponding lower-lying multiplet manifolds {sup 2S+1}L{sub J} of Er{sup 3+}(4f{sup 11}) in these garnet hosts. The emission cross sections of the intermanifold Er{sup 3+} {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 15/2} (1.5 {mu}m) transition as well as the principal inter-Stark transition Y{sub 1}{yields}Z{sub 4} (1550 nm) within the corresponding multiplet manifolds have been determined. The room-temperature fluorescence lifetimes of the {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 15/2} (1.5 {mu}m) transition in both polycrystalline ceramic and single-crystal YAG samples were measured. From the radiative lifetimes determined from the JO model and the measured fluorescence lifetimes, the quantum efficiencies for both samples were determined. The comparative study of Er{sup 3+}(4f{sup 11}) ions performed suggests that polycrystalline ceramic YAG is an excellent alternative to single-crystal YAG rod for certain applications.
- OSTI ID:
- 20711749
- Journal Information:
- Journal of Applied Physics, Vol. 97, Issue 12; Other Information: DOI: 10.1063/1.1928327; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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