Almaz Optics, Inc.
12 Chadsford Ct.  Marlton, NJ 08053, USA
Tel:  856 797-0491, Fax: 856 797-0228
e-mail: mail@almazoptics.com

 

































Gallium Gadolinium Garnet, Gd3Ga5O12

Gallium Gadolinium Garnet (Gd3Ga5O12 or GGG) single crystal is material with good optical, mechanical and thermal properties which make it promising for use in fabrication of various optical components as well as substrate material for magneto optical films and high temperature superconductors.

Standard products: wafers and substrates with sizes from 10 x 10 mm to diameter 76.2 mm, thickness 0.5 mm and 1.0 mm, one side or both sides polished 20/10 S/D, [111] or [100] cut. Other products are available on request.

Material Properties

Crystal structure

cubic

Crystal growth method

Czochralsky

Crystal growth orientation

<111>

Melting point , C

1750

Density, g/cm3

7.08

Lattice parameter, A

12.383

Mohs hardness

7.5

Thermal expansion coefficient, K-1

8.2 - 10-6

Dielectric constant

30

Dielectric loss tangent, at 10 GHz

0.15

Transmission range, m

~3.0 x 10-4

Refractive index at:

 

480 nm

1.97

633 nm

1.96

1064 nm

1.95

Transparency range, nm

400 - 7000

Color

Colorless