Investigation of the interactions between dissimilar ions in (Er, Nd):Y/sub 3/Al/sub 5/O/sub 12/

Journal Article · Sun Jan 01 04:00:00 EST 1989 · J. Opt. Soc. Am. B: Opt. Phys.; (United States)

DOI:https://doi.org/10.1364/JOSAB.6.000023· OSTI ID:6564582

Shi, W Q; Bass, M; Birnbaum, M

Unusual fluorescence decay properties of both Er/sup 3+/ and Nd/sup 3+/ ions in (Er, Nd):YAG are reported. Studies reveal that the cross-relaxation-type ion--ion interactions involving Er/sup 3+/ and Nd/sup 3+/ ions are responsible. A rate-equation analysis is used to evaluate the interaction strengths of all the proposed processes. The rate-equation calculation does not fully explain the nonexponential nature of the measured fluorescence decay function of the /sup 4/F/sub 3/2/ Nd/sup 3+/ ions. As a result, the theory for donor--acceptor energy transfer processes, based on the inverse-power transfer rate model, is adopted to study the mechanism of the interactions between Er/sup 3+/ and Nd/sup 3+/ ions that result in the drastically altered fluorescence decay of Nd/sup 3+/ ions. It is found that the mechanisms governing the energy transfer processes have functional forms different from those for the commonly encountered electric multipolar interactions. The interaction strengths are evaluated by least-squares fitting of the theory to the experimental data. Effects of the ion--ion interactions on lasing properties of the (Er, Nd):YAG are also discussed.

• Research Organization: Center for Laser Studies, University of Southern California, Los Angeles, California 90089-1112
• OSTI ID: 6564582
• Journal Information: J. Opt. Soc. Am. B: Opt. Phys.; (United States), Journal Name: J. Opt. Soc. Am. B: Opt. Phys.; (United States) Vol. 6:1; ISSN JOBPD
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
EMISSION SPECTRA
ENERGY TRANSFER
ERBIUM ADDITIONS
ERBIUM ALLOYS
FLUORESCENCE
KINETICS
LASER MATERIALS
LASERS
LUMINESCENCE
MATERIALS
NEODYMIUM ADDITIONS
NEODYMIUM ALLOYS
NEODYMIUM LASERS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SOLID STATE LASERS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES