Product Description
In optical communication equipment, 1.3 μ And 1.5 μ The core part of the optical isolator is YIG or big film placed in magnetic field. The GGG single crystal substrates with different tangential directions can match the crystal lattice of this kind of magneto-optical materials, so as to ensure the successful epitaxial growth of YIG and big films.
In the field of magnetic refrigeration, GGG Crystal has been successfully used in the temperature range below 20K for market he Ⅱ flow and pre stage refrigeration of helium nitrogen liquefaction.
Main Advantages:
Low optical losses (<0.1%/cm)
High thermal conductivity (7.4W m-1K-1)
High laser damage threshold (>1GW/cm2)
Typical applications:
Substrate materials for YIG and BIG magneto-optical epitaxial membranes
Magnetic bubble memory storage
Magnetic refrigeration
Material Properties
| Material | GGG |
| Chemical Formula | Gd3Ga5O12 |
| Crystal Structure | Cubic |
| Lattice Constant | a=12.383 Å |
| Growth Method | Czochralski |
| Hardness | 8.0 |
| Density | 7.13g/cm³ |
| Melting Point | 1725℃ |
| Refractive Index | 1.954 @ 1064nm |
Technical Parameter
Crystro offers
| Dimensions | Max Diameter 101.6mm (4 inch) |
| Thickness | 0.5mm Other thickness upon request |
| Polishing | Single or double sides polishing |
| Orientation | <111>±0.2° |
| Orientation Flat | 2°（within 1° for special requirement） |
| Ra | Ra≤1nm, EPI ready |
| Angle of Crystalline | Special size and orientation are available upon request |
