YAG:Er{sup 3+}, CaF{sub 2}:Er{sup 3+}, and Er{sub 2}O{sub 3} Emission Spectra Under Laser and Laser Thermal Excitation
Journal Article
·
· Journal of Applied Spectroscopy
Experimental luminescence and selective-emission (SE) spectra of YAG:Er{sup 3+} (10 at.%) and CaF{sub 2}:Er{sup 3+} (1 at.%) single crystals and Er{sub 2}O{sub 3} polycrystal under laser and laser thermal excitation of the Er3+-ion multiplets are compared. Luminescence spectra under resonant excitation are determined by multiplet population relaxation with the corresponding radiative and nonradiative probabilities. The form of the SE spectra is determined by the thermal population of the multiplets and the probabilities of only radiative transitions. The SE band at 800 nm ({sup 4}I{sub 9/2} → {sup 4}I{sub 15/2}) is an indicator of high-temperature thermal emission of Er{sup 3+} ions. The absence of this band in luminescence spectra is explained by the short lifetime of the τ({sup 4}I{sub 9/2}) level of 53 ns at T = 300 K.
- OSTI ID:
- 22810093
- Journal Information:
- Journal of Applied Spectroscopy, Journal Name: Journal of Applied Spectroscopy Journal Issue: 2 Vol. 85; ISSN 0021-9037
- Country of Publication:
- United States
- Language:
- English
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