Neodymium Doped Gadolinium Gallium Garnet (Nd:Gd<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub>) (Nd:GGG) Crystals and Substrates

Nd:GGG (Neodymium doped Gadolinium Gallium Garnet) Chemical formula: Nd:Gd3Ga5O12 Nd:GGG single crystal has excellent properties, such as high mechanical strength, chemical stability, thermal conductivity and thermal capacity, wide absorption bands at around 808 nm and long fluorescence lifetime. Because of these unique properties,Nd:GGG crystal has been considered as one of the best materials for the high average power solid-state laser. The applications include semiconductor laser pump and can be operated with CW-laser and pulse laser. Both standard and custom made Nd:GGG crystals and substrates are available at MSE Supplies. Undoped GGG crystals are also available. Available Nd concentrations are 0.6 and 1.0 (atm%) Main Parameters Crystal structure Cubic Garnet Growth method Czochralski Unit cell constant a=12.38 Å, (Z=8) Melt point (°C) 1800 Purity 99.9% Density 7.09 g/cm3 Hardness 6-7 Mohs Index of refraction 1.95 @ 1064nm Thermal Expansion 8 x 10-6/K Sizes 5x5 mm, 10x10 mm, 20x20 mm, dia 2", other sizes are available upon request Thickness 0.5mm, 1.0mm Surface Polishing Single or double side polished (epi-ready) Crystal Orientations (100), (110), (111) Surface Roughness Ra: ~ 0.5nm Package Packed in a class 100 clean bag. Reference: Solid-State Heat-Capacity Lasers: Good Candidates for the Marketplace MARK D. ROTTER, C. BRENT DANE, SCOTT FOCHS, KAI LAFORTUNE, ROY MERRILL AND BOB YAMAMOTO, LAWRENCE LIVERMORE NATIONAL LABORATORY Nd:GGG (gallium gadolinium garnet) was identified as the laser material of choice, thanks to its high thermal diffusivity (roughly 10 times greater than that of glass), its greater emission cross section (five times larger than glass's) and its greater fracture stress (five times larger than glass's). An additional advantage of GGG is that large slabs may be cut from the boule. In the pump geometry of a diode-pumped Nd:GGG heat-capacity laser, each slab is pumped by four diode arrays. The individual bars in each array are oriented to direct their output at ~45° to the array surface, as indicated by the arrows. Ion-implanted Nd:GGG channel waveguide laser, S. J. Field, D. C. Hanna, A. C. Large, D. P. Shepherd, A. C. Tropper, P. J. Chandler, P. D. Townsend, and L. Zhang, Optics Letters Vol. 17, Issue 1, pp. 52-54 (1992), https://doi.org/10.1364/OL.17.000052

Neodymium Doped Gadolinium Gallium Garnet (Nd:Gd<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub>) (Nd:GGG) Crystals and Substrates

Nd:GGG (Neodymium doped Gadolinium Gallium Garnet)

Chemical formula: Nd:Gd3Ga5O12

Nd:GGG single crystal has excellent properties, such as high mechanical strength, chemical stability, thermal conductivity and thermal capacity, wide absorption bands at around 808 nm and long fluorescence lifetime. Because of these unique properties,Nd:GGG crystal has been considered as one of the best materials for the high average power solid-state laser. The applications include semiconductor laser pump and can be operated with CW-laser and pulse laser.

Both standard and custom made Nd:GGG crystals and substrates are available at MSE Supplies.  Undoped GGG crystals are also available. 

Available Nd concentrations are 0.6 and 1.0 (atm%)

Main Parameters
Crystal structure
Cubic Garnet
Growth method
Czochralski
Unit cell constant
a=12.38 Å, (Z=8)
Melt point (°C)
1800
Purity
99.9%
Density
7.09 g/cm3
Hardness
6-7 Mohs
Index of refraction
1.95 @ 1064nm
Thermal Expansion

8 x 10-6/K
Sizes
5x5 mm, 10x10 mm, 20x20 mm, dia 2", other sizes are available upon request
Thickness
0.5mm, 1.0mm
Surface Polishing
Single or double side polished (epi-ready)
Crystal Orientations
(100), (110), (111)
Surface Roughness Ra:
~ 0.5nm 
Package
Packed in a class 100 clean bag.


Reference:

Solid-State Heat-Capacity Lasers: Good Candidates for the Marketplace

MARK D. ROTTER, C. BRENT DANE, SCOTT FOCHS, KAI LAFORTUNE, ROY MERRILL AND BOB YAMAMOTO, LAWRENCE LIVERMORE NATIONAL LABORATORY

Nd:GGG (gallium gadolinium garnet) was identified as the laser material of choice, thanks to its high thermal diffusivity (roughly 10 times greater than that of glass), its greater emission cross section (five times larger than glass's) and its greater fracture stress (five times larger than glass's). An additional advantage of GGG is that large slabs may be cut from the boule.

In the pump geometry of a diode-pumped Nd:GGG heat-capacity laser, each slab is pumped by four diode arrays. The individual bars in each array are oriented to direct their output at ~45° to the array surface, as indicated by the arrows.

Ion-implanted Nd:GGG channel waveguide laser, S. J. Field, D. C. Hanna, A. C. Large, D. P. Shepherd, A. C. Tropper, P. J. Chandler, P. D. Townsend, and L. Zhang, Optics Letters Vol. 17, Issue 1, pp. 52-54 (1992), https://doi.org/10.1364/OL.17.000052

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