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Applied Optics

Applied Optics


  • Vol. 37, Iss. 30 — Oct. 20, 1998
  • pp: 7100–7106

Effects of chromophore dissociation on the optical properties of rare-earth-doped polymers

Renyuan Gao, Christopher Koeppen, Guoqi Zheng, and Anthony F. Garito  »View Author Affiliations

Applied Optics, Vol. 37, Issue 30, pp. 7100-7106 (1998)

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The observed dissociation of tetrakis rare-earth chromophores in rare-earth-doped organic polymers is reported, and a time-resolved spectroscopic technique is presented to determine quantitatively the fractional concentrations of different chromophore species in various solvents. Based on this technique, the equilibrium constants of tetrakis rare-earth chromophores in rare-earth-doped polymers are determined. Thus, the equilibrium constants for tetrakis rare-earth compounds of benzoyltrifluoroacetonate (BTF), for example, Sm(BTF)4P and Eu(BTF)4P in methyl methacrylate monomer, are K = 4.7 ± 0.5 × 10-4 M and K = 1.2 ± 0.5 × 10-4 M, respectively. In contrast, the tetrakis rare-earth compounds of hexafluoroacetylacetonate (HFA), for example, Sm(HFA)4Net4 and Eu(HFA)4Net4, are quite stable and show no evidence of dissociation. We further characterize the dissociation of several chromophore systems and discuss the influence such dissociation has on overall optical performance. The results enable determination of optimal doping concentrations as well as preferred rare-earth chromophore preparation and doped polymer fabrication procedures.

© 1998 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(140.4480) Lasers and laser optics : Optical amplifiers
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(160.4890) Materials : Organic materials
(160.5470) Materials : Polymers
(160.5690) Materials : Rare-earth-doped materials

Original Manuscript: April 13, 1998
Revised Manuscript: July 16, 1998
Published: October 20, 1998

Renyuan Gao, Christopher Koeppen, Guoqi Zheng, and Anthony F. Garito, "Effects of chromophore dissociation on the optical properties of rare-earth-doped polymers," Appl. Opt. 37, 7100-7106 (1998)

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  1. See, for example, M. J. F. Digonnet, ed., Rare Earth-Doped Fiber Lasers and Amplifiers (Marcel Dekker, New York, 1993).
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  3. See, for example, C. Koeppen, “Photonics studies: rare earth chromophores for polymer optical fiber and waveguide amplifiers,” Ph.D. dissertation (University of Pennsylvania, Philadelphia, Pa., 1997) and references therein.
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  9. C. Brecher, H. Samelson, A. Lempicki, “Laser phenomena in europium chelates,” J. Chem. Phys. 42, 1081–1096 (1965). [CrossRef]
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