Fluorescence lifetime study on sol-gel derived Er3+-doped SiO2-TiO2-Al2O3 planar waveguides

Q. Xiang*, Y. Zhou, B. S. Ooi, Y. L. Lam, Y. C. Chan, C. H. Kam

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


In the present paper, we report the preparation of Er3+-doped SiO2-TiO2-Al2O3 planar waveguides deposited on SOS (Silica on silicon) substrates using sol-gel process combining with spin-coating and rapid thermal annealing (RTA). The recipes used for preparing the solutions by sol-gel process are 93SiO2:7TiO2:20AlO1.5:×ErO1.5 (x = 0.5, to 1 and 2). The fluorescence spectra and lifetimes of the planar waveguides were measured under the excitation of 514 nm wavelength from an Ar+ laser. The lifetimes of 3.80 ms, 3.07 ms and 1.59 ms were obtained for 0.5 mole, 1.0 mole and 2.0 mole of Er3+ content planar waveguides respectively. The decay mechanism and the factors that influence the lifetime of the sol-gel planar waveguides have been analyzed.

Original languageEnglish (US)
Pages (from-to)54-59
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2000
Externally publishedYes
EventRare-Earth-Doped Materials and Devices IV - San Jose, CA, USA
Duration: Jan 26 2000Jan 27 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Applied Mathematics
  • Electrical and Electronic Engineering
  • Computer Science Applications


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