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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 19, Iss. 9 — Sep. 1, 2002
  • pp: 1982–1989

Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses

Daniel J. Coleman, Paul Golding, Terence A. King, and Stuart D. Jackson  »View Author Affiliations


JOSA B, Vol. 19, Issue 9, pp. 1982-1989 (2002)
http://dx.doi.org/10.1364/JOSAB.19.001982


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Abstract

The absorption and emission spectra and the rate parameters for the important energy-exchange processes relevant to the 4I11/24I13/2 laser transition in Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses are presented. The rate parameters are determined after optical excitation with a tunable pulsed optical parametric oscillator that excites the 4I11/2 and 4I13/2 energy levels directly. For the Er3+ singly doped samples, the energy-transfer upconversion (ETU) macroscopic rate parameters for the upper and lower laser levels were measured for a range of Er3+ concentrations. In correspondence with ZBLAN and the fluoride crystals, the (4I13/2, 4I13/2)→(4I9/2, 4I15/2) ETU process of the lower laser level is measured to be stronger than the corresponding ETU process of the upper laser level. Such a condition enables energy recycling to occur. A higher rate of energy transfer from the 4I13/2 level of Er3+ to Pr3+ deactivator is measured as compared with the corresponding energy transfer from 4I11/2 level to both the Pr3+ deactivator and OH impurity. With these favorable energy-transfer conditions, the prospect for the future development of highly efficient ∼3-μm fiber lasers with GeGaS glass as the host material is excellent.

© 2002 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(160.5690) Materials : Rare-earth-doped materials
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

Citation
Daniel J. Coleman, Paul Golding, Terence A. King, and Stuart D. Jackson, "Spectroscopic and energy-transfer parameters for Er3+-doped and Er3+, Pr3+-codoped GeGaS glasses," J. Opt. Soc. Am. B 19, 1982-1989 (2002)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-19-9-1982

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