Terbium Gallium Garnet TGG Magneto Optical Crystal for Optical Isolators - 3" Diameter, 40 rad/T/m Verdet Constant
Price:
USD 20-100/pc
MOQ:
1pc
Delivery Time:
3-4 weeks
Brand:
Crystro
Product Description
Terbium Gallium Garnet (TGG) Magneto-Optical Crystal
Terbium Gallium Garnet (TGG) is the premier crystal material for Faraday devices used in optical isolators. This magneto-optical crystal enables precise control of light polarization through Faraday rotation, making it essential for advanced laser systems.
Core Technology & Function
Faraday rotators utilize TGG rods within specially designed magnets to rotate light polarization. The optical isolator configuration employs a 45-degree rotator positioned between two aligned polarizers, allowing unidirectional light transmission while blocking reverse propagation.
Key Performance Features
- Large Size Boule Diameter: up to 3 inches (76mm)
- Extinction Ratio: Standard >35 dB, High Grade >40 dB
- Verdet Constant: 40 rad/T/m at 1064 nm wavelength
- Refractive Index: 1.95 at 1064 nm
- Optimal Performance Range: 400nm-1100nm (excluding 470-500nm)
Primary Applications
- Faraday Rotators for polarization control
- Optical Isolators for laser system protection
- YAG lasers and Ti:sapphire tunable lasers
- Ring lasers and seed injected laser systems
Material Properties
| Property | Specification |
|---|---|
| Chemical Formula | Tb₃Ga₅O₁₂ |
| Lattice Parameter | a = 12.355 Å |
| Growth Method | Czochralski |
| Density | 7.13 g/cm³ |
| Mohs Hardness | 8.0 |
| Melting Point | 1725°C |
Manufacturing Specifications
| Parameter | Tolerance |
|---|---|
| Orientation | [111] within ±15 arc min |
| Wave Front Distortion | <1/8 wave |
| Extinction Ratio | >35 dB |
| Diameter Tolerance | +0.00mm/-0.05mm |
| Length Tolerance | ±0.2mm |
| Chamfer | 0.10mm @ 45° |
| Flatness | <1/10 wave at 633nm |
| Parallelism | <30 arc seconds |
| Perpendicularity | <5 arc min |
| Surface Quality | 10/5 Scratch/Dig |
| AR Coating | <0.2% |
| Available Diameters | 2.0-76 mm |
Technical Advantages
TGG crystals offer exceptional magneto-optical properties including high Verdet constant, minimal light loss, superior thermal conductance, and excellent light damage threshold. These characteristics make TGG the material of choice for demanding optical applications requiring precise polarization control and reliable isolation performance.
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Company
ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd.
Location
No. 176, Yuner Rd, Yunhai Rd Industrial Park, Baohe District，Hefei City，Anhui Province
Contact Person
Wu