Growth, thermal, and spectroscopic properties of a 2.911 μm Yb,Ho:GdYTaO₄ laser crystal

Abstract

A promising 2.911 μm Yb,Ho:GdYTaO4 laser crystal was grown successfully by the Czochralski method for the first time.

Growth and spectroscopic properties of the 2.9μm Tm,Ho:LuYAG laser crystals

“…However, the Ho 3+ singly doped crystals exhibit low absorption and pumping efficiencies when they are pumped by commercially laser diode (LD) or flash lamp. To solve this problem, Tm 3+ or Yb 3+ ions could be selected as the sensitizer for the Ho 3+ ions to improve the absorption and pumping efficiencies [12][13][14][15].…”

Upconversion luminescence and optical thermometry behaviors of Yb3+ and Ho3+ co-doped GYTO crystal

“…The low symmetry and strong crystal field effect of GdTaO 4 (GTO) crystal may lead to a higher probability of electro-dipole transitions which is an attractive property in enhancing the photoluminescence efficiency of Re ions [ 33 ]. As a result, the 2.1 μm GTO laser crystal doped with Ho 3+ and Yb 3+ /Ho 3+ co-doped Gd x Y 1− x TaO 4 (GYTO) crystal with the output wavelength of 2.9 μm have been realized by Zhang et al [ 33 ] and Dou et al [ 34 ]. However, there are scarce reports regarding the UC luminescence and temperature sensor application of Yb 3+ /Ho 3+ co-doped GTO or GYTO crystals.…”

“…The ionic radius of Y 3+ (0.893 Å) is slightly smaller than that of Gd 3+ (0.938 Å), and so the introduction of Y 3+ does not cause significant lattice mismatch or structural changes of GTO. Instead, the impurity Y 3+ efficiently distorts the local symmetry of Gd 3+ and tunes the crystal field of GTO [ 34 ], further amplifying the merits of this crystal. Therefore, the objective of this paper is to investigate the UC luminescence of Yb 3+ /Ho 3+ co-doped GYTO crystal and explore its potential applications in temperature sensing.…”

Investigation of Y2.1Er0.9(ScxGa1−x)5O12 Matrix Components on the Spectral Properties around 3.0 μm by Micro-Pulling-Down Method

“…As a result, it can lose little energy when going through the atmosphere to the space. The Yb,Ho:GdYTaO 4 laser crystal [5] and Tm,Ho:LuYAG laser crystal [6] have been grown and proved that they can be used to generate the 2.911 µm laser. These examples show that the emission wavelength can be controlled by using different host materials and different doping ions together.…”