Abstract
AbstractRecent progress on rare-earth doped polycrystalline YAG transparent ceramics has made them an alternative novel solid-state laser gain material. In this paper we present results of our research on polycrystalline RE:YAG transparent ceramics. High optical quality YAG ceramics doped with various rare-earth (RE) ions such as ${\rm Nd}^{3+}$, ${\rm Yb}^{3+}$, ${\rm Er}^{3+}$, ${\rm Tm}^{3+}$, and ${\rm Ho}^{3+}$ have been successfully fabricated using the solid-state reactive sintering method. Highly efficient laser oscillations of the fabricated ceramics are demonstrated.
Highlights
There has been a resurgence of interest in rareearth (RE) doped YAG (RE:YAG) transparent ceramics as laser gain media, because the optical quality of the ceramics has been greatly improved
Kim et al reported the fabrication of Yb:Lu2O3 transparent ceramic by a hot isostatic pressing (HIP) approach[19]
To illustrate the high optical quality of the fabricated YAG ceramics, as examples, we have shown in Figure 4 the optical transmission of Er3+ and Ho3+ doped YAG under different doping concentrations
Summary
There has been a resurgence of interest in rareearth (RE) doped YAG (RE:YAG) transparent ceramics as laser gain media, because the optical quality of the ceramics has been greatly improved. In 1995, Ikesue et al achieved highly efficient continuous-wave (CW) laser emission in a Nd:YAG transparent ceramic[4,5,6]. They fabricated transparent polycrystalline Nd:YAG ceramics by a solid-state reactive sintering method using high-purity powders as the starting materials. Kim et al reported the fabrication of Yb:Lu2O3 transparent ceramic by a hot isostatic pressing (HIP) approach[19] They successfully demonstrated efficient lasing with fabricated Yb:Lu2O3 ceramic. A ceramic rod with segments of undoped YAG, 0.25% Er:YAG, and 0.5% Er:YAG was fabricated With such a composite ceramic rod of length 62 mm, lasing with a slope efficiency of 27% was achieved, compared with the 39% slope efficiency achieved on a commercial 45 mm long 0.5% Er:YAG single crystal rod[20]
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