Custom Gd3Ga5O12 Single Crystalline Substrates For Microwave Devices
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 |
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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.
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