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Proceedings Article

High Er concentration phosphate glasses for planar waveguide amplifiers

[+] Author Affiliations
Seppo Honkanen, Tomoko Ohtsuki, Nasser Peyghambarian

Optical Sciences Ctr./Univ. of Arizona (USA)

Shibin Jiang

Optical Sciences Ctr./Univ. of Arizona and Kigre, Inc. (USA)

S. Iraj Najafi

Ecole Polytechnique de Montreal (Canada)

Proc. SPIE 2996, Rare-Earth-Doped Devices, 32 (May 2, 1997); doi:10.1117/12.271162
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From Conference Volume 2996

  • Rare-Earth-Doped Devices
  • Seppo Honkanen
  • San Jose, CA | February 08, 1997

abstract

Cooperative upconversion processes and Yb-Er energy transfer efficiencies in high Er concentration phosphate glasses were studied. The cooperative upconversion coefficients were deduced from the pump intensity dependence of luminescence decay curves. Cooperative upconversion coefficients of 4I13/2 level, for Er3+ concentrations higher than 1 X 1020 cm-3, are one order of magnitude smaller than the ones reported for silica glass. The increase in the cooperative upconversion coefficient with the increase in Er3+ concentration was found to be small and Er3+ concentrations as high as 3.7 X 1020 cm3+ in this glass are feasible. Yb-Er energy transfer efficiency in Yb/Er co-doped phosphate glasses, with Er concentrations as high as 1.9 X 1020 cm-3 and 2.4 X 1020 cm-3, were measured with a pump and probe technique and also estimated from lifetime measurements. The energy transfer efficiencies exceed 95 percent, although the ratio of the concentrations, Yb/Er, is only about 1.2 and 2 in the samples studied.This confirms that efficient pumping of high Er3+ concentration phosphate glass, required in waveguide amplifiers, can be achieved utilizing Yb/Er co-doping.

© (1997) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Seppo Honkanen ; Tomoko Ohtsuki ; Shibin Jiang ; S. Iraj Najafi and Nasser Peyghambarian
"High Er concentration phosphate glasses for planar waveguide amplifiers", Proc. SPIE 2996, Rare-Earth-Doped Devices, 32 (May 2, 1997); doi:10.1117/12.271162; http://dx.doi.org/10.1117/12.271162


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