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TGG terbium gallium garnet crystal (Tb 3 Ga 5 0i2, TGG) has a high Verdet constant, low transmission loss, high thermal conductivity and high laser damage threshold in the visible and near-infrared region, and it is easy to grow large-sized crystals It is currently the best magneto-optical material for making Faraday isolators and optical rotators in this band (400-1100nm, excluding 470nm-500nm). It is widely used in YAG , Ti - doped sapphire and other multi-stage amplification, ring and The seeds are injected into the laser.
Main Feature
Large Verdet constant (40 rad/T m @1064nm)
Low light loss (<0.1%/cm)
High thermal conductivity (7.4W m K)
High laser damage threshold (>1GW/cm2 )
Typical Application
Faraday rotators, optical isolators
Material Properties
| molecular formula | Tb 3 Ga 5 O 12 |
| growth pattern | Czochralski |
| density | 7.13g/ cm3 |
| hardness | 8.0 |
| melting point | 1725°C |
| Refractive index | 1.954 @ 1064nm |
Product Parameters
| Orientation accuracy | [111] ±15′ |
| wavefront distortion | <λ/8 |
| Extinction Ratio | >30dB |
| Diameter Tolerance | 0.00-0.05mm |
| Length Tolerance | ±0.1mm |
| Chamfer | 0.10mm @45º |
| Flatness | <λ/10 @ 633nm |
| Parallelism | <30" |
| Perpendicularity | <5' |
| smoothness | 10-5 |
| coating | AR, R<0.2% @1064nm or according to customer requirements |
| damage threshold | ＞10J/cm 2 @1064nm 10ns 10KHZ |
| Size range | According to customer size |
