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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 9 — May. 1, 2006
  • pp: 3893–3905

Concentration quenching in fine-grained ceramic Nd:YAG

Larry D. Merkle, Mark Dubinskii, Kenneth L. Schepler, and S. M. Hegde  »View Author Affiliations

Optics Express, Vol. 14, Issue 9, pp. 3893-3905 (2006)

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We have studied the concentration dependent fluorescence decay kinetics of ceramic Nd:YAG, to resolve inconsistencies in the previous literature. Our data indicate that earlier reports of single exponential lifetimes even at Nd concentrations of a few percent were due to the effects of long-pulse excitation. Under short-pulse excitation the fluorescence decay is nonexponential for concentrations greater than about 1% atomic. Energy migration to sinks consisting of cross-relaxing Nd ions dominates at long times, whereas single-step energy transfer to randomly distributed quenching sites dominates at earlier times. The concentration dependence of this single-step transfer indicates direct cross-relaxation between individual ions at concentrations below 4% atomic, but resonant transfer to quenching sites consisting of Nd pairs at higher concentrations.

© 2006 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 6, 2006
Revised Manuscript: April 15, 2006
Manuscript Accepted: April 19, 2006
Published: May 1, 2006

Larry D. Merkle, Mark Dubinskii, Kenneth L. Schepler, and S. M. Hegde, "Concentration quenching in fine-grained ceramic Nd:YAG," Opt. Express 14, 3893-3905 (2006)

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