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Proceedings Paper

High Er concentration phosphate glasses for planar waveguide amplifiers
Author(s): Seppo Honkanen; Tomoko Ohtsuki; Shibin Jiang; S. Iraj Najafi; Nasser Peyghambarian
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Paper 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.

Paper Details

Date Published: 2 May 1997
PDF: 9 pages
Proc. SPIE 2996, Rare-Earth-Doped Devices, (2 May 1997); doi: 10.1117/12.271162
Show Author Affiliations
Seppo Honkanen, Optical Sciences Ctr./Univ. of Arizona (United States)
Tomoko Ohtsuki, Optical Sciences Ctr./Univ. of Arizona (United States)
Shibin Jiang, Optical Sciences Ctr./Univ. of Arizona and Kigre, Inc. (United States)
S. Iraj Najafi, Ecole Polytechnique de Montreal (Canada)
Nasser Peyghambarian, Optical Sciences Ctr./Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 2996:
Rare-Earth-Doped Devices
Seppo Honkanen, Editor(s)

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