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Custom Gd3Ga5O12 Single Crystalline Substrates
GGG is also substrate material for microwave devices.
In the optical communication devices,require a lot of using 1.3u
and 1.5u optical isolator,which core component is the YIG or BIG
film been placed in a magnetic field.
GGG has been successfully applied in the magnetic refrigeration
industry in the temperature zone below 20 k for market HeII flow
and helium-nitrogen liquefaction pre-stage refrigeration.
Crystro's GGG has low optical lossed(<0.1%/cm),high thermal
conductivity(7.4W m-1K-1),High laser damage threshold(>1GW/cm2)
Size | Max 4inch dia |
Thickness | 0.5mm, 1.0mm |
Polishing | Single or double side |
Orientation | <111>,<100> ±2° |
Edge orientation accuracy | <2° |
Edge Cutting | custom |
Roughness | <0.5nm |
Package | thousand grade clean room,vaccum bags |
Orientation | [111] within ±15 arc min |
Wave Front Distortion | <1/4 wave@632 |
Diameter Tolerance | ±0.05mm |
Length Tolerance | ±0.2mm |
Chamfer | 0.10mm@45º |
Flatness | <1/10 wave at 633nm |
Parallelism | < 30 arc Seconds |
Perpendicularity | < 15 arc min |
Surface Quality | 10/5 Scratch/Dig |
Clear Apereture | >90% |
Large Dimensions of Crystals | 2.8-76 mm in diameter |
Compare GGG with SGGG:
Material | GGG | SGGG |
Chemical Formular | Gd3Ga5O12 | Substituted GGG |
Lattice Constant | 12.383A | 12.497A |
Growth Method | Czochralski | Czochralski |
Density | 7.13g/cm3 | 7.09g/cm3 |
Mohs Hardness | 8 | 7.5 |
Melting Point | 1725℃ | 1730℃ |
Refractive Index | 1.954 at 1064nm | 1.954 at 1064nm |
document:
GGG SGGG NGG Crystal.pdf
Crystro has perfect automatic production machine, the current
products are mainly concentrated in the YAG, TGG, TSAG,GGG
,LGS,Ce:GAGG ,Ce:YAG and Ce: LuYAG crystals.
We also established a crystal research center and developed
different kinds of crystals. Keep providing technical support and
training for new applications and product development staffs.