Erbium‐doped fiber devices have been extraordinarily successful due to their broad optical
gain around 1.5–1.6 µm. Er‐doped fiber amplifiers enable efficient, stable amplification of …

Sesquioxides are outstanding host materials for rare-earth doped laser gain media.
Unfortunately, their very high melting points make it challenging for them to be fabricated in …

We show theoretically with the simplest possible model that the intensity of an upconversion
luminescence that is excited by the sequential absorption of n photons has a dependence …

We report on the first laser operation of a disordered Tm: CaGdAlO_4 crystal on the^
3H_4?^ 3H_5 transition. Under direct pumping at 0.79 µm, it generates 264? mW at 2.32 …

In this article, we demonstrate great potential of lightly-erbium (Er 3+)-doped ZrF 4 fiber in
efficient power scaling at∼ 2.8 μm, when excited at∼ 1.7 μm. Core-pumped by a random …

We investigate the influence of interionic upconversion between neighboring ions in the
upper laser level of Nd: YLF and Nd: YAG on population dynamics, heat generation, and …

Lasers based on erbium ions using 4 I 11/2​→​ 4 I 13/2 transition can generate laser
radiation in the spectral range from 2.7​ μm to 3​ μm. Since the strong absorption peak of …

With its recent breakthrough in terms of output power the erbium 3-/spl mu/m fiber laser has
become an object of intense scientific research and an increasingly attractive tool for …

The influence of energy migration and energy-transfer upconversion (ETU) among
neighboring Er3+ ions on luminescence decay and steady-state population densities in …

We report on a detailed revision of the spectroscopic properties of Er^ 3+ ions in the cubic
sesquioxide host crystals R_2O_3 (R= Y, Lu and Sc). The 4f-4f transition probabilities are …