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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 17, Iss. 10 — Oct. 1, 2000
  • pp: 1671–1677

Energy transfer and upconversion processes in Nd3+-doped GeO2–PbO–Nb2O5 glass

R. Balda, M. Sanz, J. Fernández, and J. M. Fdez-Navarro  »View Author Affiliations


JOSA B, Vol. 17, Issue 10, pp. 1671-1677 (2000)
http://dx.doi.org/10.1364/JOSAB.17.001671


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Abstract

The optical properties of Nd3+-doped lead germanate glass of composition (in mol. %) 60GeO225PbO15Nb2O5 have been investigated for several Nd3+ concentrations at various temperatures by steady-state and time-resolved laser spectroscopy. Judd–Ofelt parameters were derived from the absorption spectrum and used to calculate the  4F3/24I11/2 stimulated-emission cross section and the  4F3/2 radiative lifetime. The spectral features of the time-resolved fluorescence line narrowing  4F3/24I9/2 emission spectra obtained under resonant excitation reveal the existence of spectral migration of excitation among the Nd3+ ions. Analysis of the time evolution of the  4F3/24I9/2 narrowed emission showed that the electronic mechanism responsible for the ion–ion interaction can be identified as a dipole–dipole energy-transfer process. Green, orange, and red emissions were observed in this glass under continuous-wave infrared laser excitation and are attributed to transitions from the  4G7/2 level.

© 2000 Optical Society of America

OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(190.7220) Nonlinear optics : Upconversion
(300.6360) Spectroscopy : Spectroscopy, laser
(300.6500) Spectroscopy : Spectroscopy, time-resolved

Citation
R. Balda, M. Sanz, J. Fernández, and J. M. Fdez-Navarro, "Energy transfer and upconversion processes in Nd3+-doped GeO2–PbO–Nb2O5 glass," J. Opt. Soc. Am. B 17, 1671-1677 (2000)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-17-10-1671

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