Terbium gallium garnet (Tb3Ga5O12, TGG) is a crucial category of magneto-optical materials for use in the visible and near-infrared spectral regions((400-470nm and 500-1500nm)). The TGG crystal possesses a large Verdet constant (35 RadT−1m−1 at 1064 nm), high thermal conductivity (7.4 Wm−1K−1), low optical losses (< 0.1%/cm), and high laser damage threshold (> 1 GW/cm2). Therefore, it is an attractive Faraday-rotating crystal suitable for constructing magneto-optical isolators, magneto-optical switches, magneto-optical modulators, and so on, widely used in YAG, Ti-doped sapphire, and other multi-stage amplification, ring type, seed injection laser.
Chemical Formula | TB3Ga5O12 |
Lattice Parameter | a=12.355Å |
Growth Method | Czochralski |
Density | 7.13g/cm3 |
Mohs Hardness | 8.0 |
Melting Point | 1725℃ |
Refractive Index | 1.954 at 1064nm |
We can offer to customize TGG crystal sizes upon your request.
Orientation | [111] within ±15 arc min |
Wavefront Distortion | <1/8 wave |
Extinction Ratio | >35dB |
Diameter Tolerance | +0.00mm/-0.05mm |
Length Tolerance | +0.2mm/-0.2mm |
Chamfer | 0.10mm@45º |
Flatness | <1/10 wave at 633nm |
Parallelism | < 30 arc Seconds |
Perpendicularity | < 5 arcmin |
Surface Quality | 10/5 Scratch/Dig |
AR Coating | <0.2% |
Large Dimensions of Crystals | MAX φ 101.6mm (4 inches) |