Er3+:YAG, Er3+:CaF2, and Er2O3 EMISSION SPECTRA UNDER LASER AND LASER THERMAL EXCITATION
Abstract
The experimental spectra of the luminescence and selective emission (SE) of 10 at.%Er3+: YAG and 1 at.%Er3+ :CaF2: single crystals and Er2O3 polycrystal under laser and laser thermal excitation of the multiplets of the Er3+ ion electron shell are compared. Luminescence spectra under resonant excitation are determined by the relaxation of the population of the multiplets with proper radiative and nonradiative probabilities. The form of the SE spectra is determined by the thermal population of the multiplets and the probabilities of radiative transitions. The SE band at λ ≈ 800 nm (4I9/2→4I15/2) is an indicator of the high temperature thermal emission of Er3+ ions. The absence of this band in the luminescence spectra is explained by the small lifetime of the level τ(4I9/ 2 )= 53 ns at T = 300 K.
About the Author
V. M. Marchenko
A. M. Prokhorov General Physics Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
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Review
For citations:
Marchenko V.M. Er3+:YAG, Er3+:CaF2, and Er2O3 EMISSION SPECTRA UNDER LASER AND LASER THERMAL EXCITATION. Zhurnal Prikladnoii Spektroskopii. 2018;85(2):226-230. (In Russ.)
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