Yb3+-doped Gd3Ga5O12 garnet single crystals grown by the micro-pulling down technique for laser application. Part I: Spectroscopic properties and assignment of energy levels

Why so deep research on Yb3+-doped optical inorganic materials?

“…These methods allow the development of characterization of optical parameters in solid-state samples, and also the growth of flexible single crystal laser fibres which might be mainly used as high average power solid-state lasers under high-power laser diode. We have chosen to study Y 3 Al 5 O 12 (YAG) yttrium aluminium garnet [13][14][15][16], Gd 3 Ga 5 O 12 (GGG) gadolinium gallium garnet [17,18], Y 2 O 3 yttria sesquioxide [14][15][16][17][18][19][20] and CaF 2 [21] fluoride as typical examples of Yb 3+ -doped hosts, which are considered among important laser crystals due to their unusual combination of favourable properties. The room temperature absorption and emission of spectra of Yb 3+ -doped YAG crystals, which were grown by LHPG technique, are shown in Fig.…”

Growth and properties of Nd:Lu3Ga5O12 laser crystal by floating-zone method

“…O2 ( Â 10 À 20 cm 2 ) O4 ( Â 10 À 20 cm 2 ) O6 ( Â 10 À 20 cm 2 ) b J 0 (%) 4 F 3/2 -4 F 9/2 b J 0 (%) 4 With a spectral analyzer (0.75 nm spectral resolution), the spectrum of the cw laser was recorded and it is shown in Fig. 6.…”

“…As an important part of solid-state lasers, the laser material is the key factor that determines the properties of lasers. Neodymium-(Nd) doped garnet crystals have been studied as excellent laser materials, including Y 3 Al 5 O 12 (YAG), Y 3 Ga 5 O 12 (YGG), Lu 3 Al 5 O 12 (LuAG), Gd 3 Ga 5 O 12 (GGG), Gd 3 Sc 2 Ga 3 O 12 (GSGG) and Y 3 Sc 2 Ga 3 O 12 (YSGG) due to their high optical quality, excellent heat conductivity and stable structure [1][2][3][4][5][6][7][8][9][10][11]. As the most important representative of garnet crystals, Nd-doped YAG has been one of the most widely used laser crystals and output power has reached tens of kilowatts [12,13].…”

Luminescence and Luminescence Kinetics of Gd3Ga5O12Polycrystals Doped with Cr3+and Pr3+

“…The laser action has been reported in GGG:Nd 3+ , in the spectral range 1.06-1.42 µm [1,2] and in GGG:Yb 3+ , in the spectral range 1.048 µm [3][4][5]. The GGG crystals doped with various rare-earth ions (Eu 3+ , Pr 3+ , Tb 3+ , Er 3+ [6] and Tm 3+ , and Yb 3+ [7]) have been also used for demonstration of up-conversion processes.…”