TSAG Terbium Scandium Aluminum Garnet
TSAG single crystal is a material with excellent magneto-optical properties and is used in optical isolators for fiber lasers. It is compatible with the visible to near-infrared wavelength range (400–1600 nm) and combines a high Verdet constant with exceptional thermal and mechanical properties, making it a promising magneto-optical material for next-generation high-power lasers.
Compared to TGG crystals, TSAG offers a higher Verdet constant and lower absorption loss, enabling the miniaturization of optical isolators. It is particularly ideal as a magneto-optical material for high-power applications.
Compared to TGG crystals, TSAG offers a higher Verdet constant and lower absorption loss, enabling the miniaturization of optical isolators. It is particularly ideal as a magneto-optical material for high-power applications.
Features
- Verdet constant: 48 rad/T·m (@1064 nm)
※Approximately 20% higher compared to TGG - Absorption loss: ＜2500 ppm/cm (@1064 nm)
- Suitable for high-power laser applications
- Contributes to the miniaturization of optical isolators
Applications
- Faraday rotators
- Optical isolators
Physical Specifications
| Item | Specification |
|---|---|
| Chemical Formula | Tb3Sc2Al3O12 |
| Lattice Constant | a = 12.3 Å |
| Crystal Growth Method | CZ |
| Density | 5.91 g/cm3 |
| Melting Point | 1970 ± 10 ℃ |
| Transmission Wavelength Range | 400 nm ～ 1600 nm |
| Verdet Constant | 48 rad/T·m (@1064 nm) |
Optical Specifications
| Item | Specification |
|---|---|
| Crystal Orientation Accuracy | [111] ±15′ |
| Wavefront Distortion | < λ/8 (@633 nm) |
| Extinction Ratio | > 30 dB |
| Diameter Tolerance | 0.00 / -0.05 mm |
| Length Tolerance | ±0.1 mm |
| Chamfering | 0.10 mm × 45° |
| Flatness | < λ/10 (@633 nm) |
| Parallelism | < 30″ |
| Perpendicularity | < 5′ |
| Surface Quality (Scratch-Dig) | 10/5 |
| Coating | AR Coating (R < 0.2% @1064 nm) or Customizable |
| Laser Damage Threshold | > 10 J/cm2 (@1064 nm, 10 ns, 10 kHz) |