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Terbium Gallium Garnet Crystal (TGG)
Everfoton's TGG crystal is manufactured by advanced crystal pulling (CZ) technology, with superior characteristics such as high magneto-optical merit value, low light absorption, excellent thermal conductivity, and high laser damage threshold. It is the best magneto-optical material used for Faraday rotators and isolators. The suitable wavelength is 400nm~1100nm (not including 470nm~500nm). The size of TGG product can be customized according to customer's special requirements.
High Verdet constant
High laser damage threshold
High extinction ratio
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Applications
- Isolator
- Faraday rotator
Specifications
| Product Type | TGG Φ5×15，TGG 3.5×8×5 | ||||
| Basic Performance | Optical Performance | ||||
| Chemical Formula | Tb3Ga5O12 | Refractive Index | 1.954@1064 nm | ||
| Structure | Cubic Garnet | Laser Damage Threshold (W/cm2) | ＞1G | ||
| Lattice Constant (Å) | a = 12.355 | Verdet Constant (Rad/ T·m) | 35@1064 nm | ||
| Orientation | < 111 > | Extinction Ratio (dB) | ≥ 35 | ||
| Density (g/cm3) | 7.13 | Optical Losses (%/cm) | ＜0.1 | ||
| Moh’s Hardness | 8.0 | Antireflection Coating (%@1064 ± 30 nm) | AR:R＜0.2 | ||
| Processing Quality | |||||
| Directional ( ′ ) | ±15 | Diameter (mm) | + 0.00/- 0.05 | ||
| Length (mm) | ± 0.1 | Cleanliness | 10/5 | ||
| Flatness | ＜ λ / 8@633 nm | Parallelism ( ″ ) | ＜30 | ||
| Verticality ( ′ ) | ＜10 | Chipping (mm) | ＜0.1 | ||
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