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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 10 — Oct. 1, 2006
  • pp: 2209–2216

Excited-state dynamics including radiative diffusion in quasi-three-level laser crystals: application to Yb 3 + -doped Y 3 Al 5 O 12

Alain Brenier  »View Author Affiliations


JOSA B, Vol. 23, Issue 10, pp. 2209-2216 (2006)
http://dx.doi.org/10.1364/JOSAB.23.002209


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Abstract

I present a model devoted to linking the properties of a quasi-three-level laser crystal to microscopic parameters. The role of the radiative diffusion is taken into account with a sample-size-dependent parameter, including the total internal reflections, allowing both radiative and nonradiative diffusions to be treated equally. The radiation self-trapping aspect is quantified with the number η imp of imprisoned photons engendered by one absorbed pump photon. The losses toward the traps that are not always well known are described with the dipole–dipole interaction, giving a microscopic interpretation of the heat dispensed in the sample from the pump. One prediction is that the excited-state decay of the donor subsystem is exponential, in agreement with experiment. The main experimental data, which are the excited-state intrinsic and extrinsic lifetimes τ and τ and the extrinsic fractional thermal loading ξ , can be calculated by adjusting a small number of parameters. This number can be reduced by use of spectroscopy. I have shown that this model can be applied with a reasonable success to Yb 3 + -doped Y 3 Al 5 O 12 .

© 2006 Optical Society of America

OCIS Codes
(140.3580) Lasers and laser optics : Lasers, solid-state
(160.3380) Materials : Laser materials
(260.0260) Physical optics : Physical optics

ToC Category:
Spectroscopy

History
Original Manuscript: October 14, 2005
Revised Manuscript: May 18, 2006
Manuscript Accepted: June 1, 2006

Citation
Alain Brenier, "Excited-state dynamics including radiative diffusion in quasi-three-level laser crystals: application to Yb3+-doped Y3Al5O12," J. Opt. Soc. Am. B 23, 2209-2216 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-10-2209

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