Room Temperature Cw Yb:GGG Laser Operation at 1,038-/spl mu/m

Abstract

Ybdoped materials. whith typically lase around 1,03 pm, have the simple electronic stNctwe of Yband have attraded cnnsiderable attention over the past few years. Only a several Ybdoped aystals have been extensively studied as laser media to date: %YAG 111, Yb-FAP,YbS-FAP lu and Yb-GSGG 131.In this paper we repotl for the first time about m m temperature single-mode CW operation of Yb-EdSGa~Ot2 ( YCGGG) laser at Ti-sapphire laser pump in the range of 0.944.97 pm.

Visible luminescence in Yb3+-doped gadolinium gallium garnets

“…It is worth noting that the emission spectrum extends up to nearly 1050 nm, which is promising for the development of broadly tunable laser sources, as well as for the design of femtosecond oscillators or amplifiers. We assumed that the radiative lifetime was 0.8 ms, which is the values measured by Belovolov et al [4] (while in our sample the measured lifetime are 1.7 and 0.6 ms for 10% and 30% Yb concentration because of radiation trapping and quenching by impurities ions such as Er and Ho which will be discussed later). These results are encouraging in terms of energy storage and laser power capacity.…”

“…Owing to this unique configuration, Yb 3+ presents remarkable properties. The thermal conductivity of Yb:GGG is larger than that of Yb:YAG with Yb doping level more than 4 at.% [3,4]. Owing to this unique configuration, Yb:GGG crystal presents remarkable properties.…”

Preparation and properties of Nd,Yb:GGG polycrystalline nanopowders

“…In the latest years, gadolinium gallium garnet (GGG) polycrystalline nanopowders have attracted great interest due to their high performance in technological applications [1][2][3][4][5]. Various methods have been explored to synthesize gadolinium gallium garnet (GGG) polycrystalline powders, such as solid-state method, sol-gel, hydrothermal method etc.…”

Growth and luminescence of epitaxial Yb0.3ErxGd2.7-xGa5O12films

“…Since a two-level model of the ytterbium ion does not account for such a strong anti-Stokes luminescence, it was suggested [1] that these crystals are characterised by a quasi-two-level spectrum of Yb 3 and by new cooperative effects as a result of which energy levels (or groups of levels) with transition energies corresponding to the blue^green part of the spectrum appear in the system of excited and interacting Yb 3 ions.…”

“…This should lead to filling of levels with energies of about 19 000 cm À1 as a result of up-conversion transitions between the real levels in the Er 3 energy spectrum. Moreover, the presence of the Er 3 ions and their sensitisation by the Yb 3 ions should excite strong luminescence in the region of l 1X55 mm [1]. The absence of this luminescence band may indicate a special nature of sensitisation of microscopic erbium impurities by ytterbium ions, leading to suppression of the corresponding radiative transitions.…”