TGG Terbium Gallium Garnet
TGG single crystals are magneto-optical materials used for the fabrication of Faraday rotators and optical isolators. Their applicable wavelength range is 400 nm to 1100 nm (excluding the wavelength band of 470 nm to 500 nm).
Features
- Verdet constant: 40 rad/T·m (@1064 nm)
- Absorption coefficient: < 0.1%/cm
- Thermal conductivity: 7.4 W/m·K
- Laser damage threshold: > 1 GW/cm2
Applications
- Optical Isolator
- Faraday Rotator
Physical Specifications
| Item |
Specification |
| Chemical Formula |
Tb3Ga5O12 |
| Lattice Constant |
a = 12.355 Å |
| Crystal Growth Method |
CZ |
| Density |
7.13 g/cm3 |
| Hardness |
8 |
| Melting Point |
1725 ℃ |
| Transmission Wavelength Range |
400 nm ～ 1100 nm |
| Verdet Constant |
40 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 |
| Bevel |
0.10 mm × 45° |
| Flatness |
< λ/10（@633 nm） |
| Parallelism |
< 30″ |
| Perpendicularity |
< 5′ |
| Surface Quality |
10/5 |
| Coating |
AR Coating (R < 0.2% @1064 nm) or Customizable |
| Laser Damage Threshold |
> 10 J/cm2 (@1064 nm, 10 ns, 10 kHz) |
| Maximum Size |
φ100 mm |
