Articles

Temperature-dependent spectroscopic properties of Tm³⁺ in germanate, silica, and phosphate glasses: A comparative study

May 05, 2008

By: Giorgio Turri, Vikas Sudesh, Martin Richardson, Michael Bass, Alessandra Toncelli, and Mauro Tonelli

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Some of the results discussed in the article were obtained by analysis of Nufern Thulium-doped fibers.

Abstract

Spectroscopic properties of thulium-doped germanate, silica, and phosphate glasses were measured and compared since such glasses are of interest as materials for fiber lasers in the eye-safe wavelength region. ³F₄ excited state fluorescence decay dynamics was investigated at temperatures from 8 to 300 K and the results revealed a strong dependence of the ³F₄ lifetime on the host matrix. The temperature-dependent stimulated emission cross section was obtained by using the Fuchtbauer–Ladenburg technique. In phosphate glass the fluorescent lifetime is short, making this material difficult to use for 2 µm laser purposes. Tm³⁺-doped germanate glass shows a longer lifetime than silica, a comparable value of stimulated emission cross section and some interesting temperature-independent properties.

Complete text was published in the Journal of Applied Physics, and is © 2008 American Institute of Physics. Find access to the original article here.