TGG crystal
Terbium gallium garnet (Tb3Ga5O12, TGG) crystals have large magneto-optical constants, low optical losses, high thermal conductivity, and high laser damage thresholds, and are widely used in multi-level amplification, ring, and seed injection lasers such as YAG and Ti doped sapphire. TGG single crystal is the optimal magneto-optical material for making Faraday rotators and isolators, with suitable wavelengths ranging from 400 to 1100nm (excluding 470 to 500nm)
Physicochemical properties
| Chemical formula | Tb3Ga5O12 |
| The crystal structure | Cubic crystal system |
| The lattice constant | 12.355 A |
| Melting point | 1725 ℃ |
| Density, g/cm3 | 7.13 |
| Mohs hardness | 8.0 |
| Verdet Constant | 35 rad |
| Transmission loss | < 0.1% / cm |
| Thermal conductivity | 7.4W·m-1·K-1 |
| Laser damage threshold | > 1 GW/cm2 |
| The refractive index | 1.954 (1064 nm) |
Specification
| Directional | <111> |
| Dimensioin tolerance | Dia±0.1mm; L±0.2mm |
| Flatness | < λ/10 |
| Parallelism | ≤ 30″ |
| Vertical degree | ≤ 5 ′ |
| Surface finish | 10/5 |
| Optical quality | Extinction ratio: 30dB |
| Coating system | ≤ 0.2%@1064nm |
* Blanks or chips with the required crystal size and specifications of terbium gallium garnet (Tb3Ga5O12, TGG) can be provided upon special requirements.
