Product Code : CO-TGG-5N-CU
Terbium Gallium Garnet (Tb3Ga5O12, TGG) is an excellent magneto-optical crystal used in various Faraday devices (Rotators and Isolators) in the range of 400 nm-1100 nm, excluding 475 nm-500 nm.TGG (Terbium Gallium Garnet) Crystal is the best magneto-optical material used to make Faraday rotators and isolators.
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Product Information
Terbium Gallium Garnet (Tb3Ga5O12, TGG) is an excellent magneto-optical crystal used in various Faraday devices (Rotators and Isolators) in the range of 400 nm-1100 nm, excluding 475 nm-500 nm.TGG (Terbium Gallium Garnet) Crystal is the best magneto-optical material used to make Faraday rotators and isolators.
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.
Synonyms
TGG, terbium gallium oxide, TB-GLG-01, TB-LGL-01-ISX
TGG Crystal Specification
Size：customized
| Orientation | [111] within ±15′ |
| Extinction Ratio | ＞ 30 dB |
| Diameter Tolerance | ± 0.1 mm |
| Length tolerance | ± 0.2 mm |
| Surface Quality (Scratch/Dig) | 10/5 to MIL-PRF-13830B |
| Flatness | ＜ λ/8 @633 nm |
| Wavefront Distortion | ＜ λ/8 @633 nm |
| Parallelism | 20 arc sec |
| Perpendicularity | ≦ 15 arc min |
| Chamfer | ≦ 0.2 mm × 45° |
| AR coating | < 0.2% at 1064 nm |
Per your request or drawing
We can customized as required
Properties（Theoretical）
| Compound Formula | Tb3Ga5O12 |
| Molecular Weight | 1017.38 |
| Appearance | Yellowish crystalline solid |
| Melting Point | 1725 °C |
| Refractive Index | 1.954 @1064 nm |
| Density | 7.13 g/cm3 |
| Nonlinear Index, n2: | 8 |
| Refractive Index | 1.95 |
| Crystal Phase / Structure | [111] |
| Thermal Conductivity | 7.4 W/m·K |
| Lattice Parameter | a = 12.355 Å |
| Growth Method | Czochralski |
| Mohs Hardness | 8 Mohs |
| Extinction Ratio(over 2/3 clear aperture) | 30dB |
| Figure of Merit, V/a: | 27 |
| Figure of Merit, V/n2: | 5 |
TGG Crystal features
Large Verdet Constant (35 Rad T-1m-1).
TGG has twice the Verdet constant of a terbium-doped glass.
Thermal conductivity is an order of magnitude greater than typical glass.
Low optical losses (<0.1%/cm)
High thermal conductivity (7.4W m-1K-1).
High laser damage threshold (＞1GW/cm2).
Optical losses are lower for TGG than Tb-doped glasses.
Applications of TGG Crystal
Terbium Gallium Garnet Crystal is used to make Faraday rotators and isolators.
Famagneto-optic waveguide based on TGG crystal via 15 MeV C3+ ion irradiation. The ion irradiation process leads to the optical anisotropy in the as-irradiated TGG waveguide,which hinders the magneto-optical rotation in the waveguide. To remove the irradiation-induced optical anisotropy, we annealed the as-irradiated TGG waveguide under different conditions. After annealing at 400°C for one hour, the magneto-opticalrotation of 14° per centimeter is observed in the waveguide at the wavelength of 632.8 nm, under the magnetic field of 0.24T, which is comparable to that observed in the TGG crystal under the same magnetic field.
Packing of TGG Crystal
Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes Special package is available on request.
ATTs’ TGG Crystal is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition
Chemical Identifiers
| Linear Formula | Tb3Ga5O12 |
