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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 2 — Feb. 1, 1999
  • pp: 308–316

Infrared emission and ion–ion interactions in thulium- and terbium-doped gallium lanthanum sulfide glass

T. Schweizer, B. N. Samson, J. R. Hector, W. S. Brocklesby, D. W. Hewak, and D. N. Payne  »View Author Affiliations


JOSA B, Vol. 16, Issue 2, pp. 308-316 (1999)
http://dx.doi.org/10.1364/JOSAB.16.000308


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Abstract

Infrared emission at 0.7, 0.8, 1.2, 1.5, 1.8, 2.3, 3.8, and 4.8 μm is measured in thulium- (Tm3+) and terbium- (Tb3+) doped gallium lanthanum sulfide (GLS) glass. Emission cross sections are calculated from the absorption and emission spectra by use of Judd–Ofelt analysis, the Füchtbauer–Ladenburg equation, and the theory of McCumber. Fluorescence and lifetime measurements confirm energy transfer from Tm3+ to Tb3+ ions and reveal a number of new cross-relaxation and upconversion processes between Tm3+ ions involving the 3F2, 3 and 3H5 levels that can be observed only in low-phonon-energy materials. These processes indicate that the most efficient pump wavelength for the 1.2- and 3.8-μm transitions is 0.7 μm. The Tm3+ fluorescence at 3.8 μm coincides with an atmospheric transmission window, and the Tb3+ fluorescence at 4.8 μm overlaps the fundamental absorption of carbon monoxide, making the glass a potential fiber laser source for remote-sensing and gas-sensing applications.

© 1999 Optical Society of America

OCIS Codes
(160.2290) Materials : Fiber materials
(160.2750) Materials : Glass and other amorphous materials
(160.3380) Materials : Laser materials
(160.5690) Materials : Rare-earth-doped materials
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(300.6340) Spectroscopy : Spectroscopy, infrared

Citation
T. Schweizer, B. N. Samson, J. R. Hector, W. S. Brocklesby, D. W. Hewak, and D. N. Payne, "Infrared emission and ion–ion interactions in thulium- and terbium-doped gallium lanthanum sulfide glass," J. Opt. Soc. Am. B 16, 308-316 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-2-308


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