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TGG - Terbium Gallium Garnet
Introduction
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.
CASTECH's magneto-optical crystal TGG is featured by • Large Verdet constant (35 Rad T-1 m-1)
• High thermal conductivity (7.4 W m-1 K-1)
• High laser damage threshold (> 1 GW/cm2)
Table 1. Basic Properties
Chemical Formula |
Tb3Ga5O12 |
Lattice Parameter |
a = 12.355 Å |
Growth Method |
Czochralski |
Density |
7.13 g/cm3 |
Melting Point |
1725℃ |
Mohs Hardness |
8 Mohs |
Refractive Index |
1.954 @1064 nm |
Specifications of TGG crystal from CASTECH
Table 2. Specifications
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 |
Products
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TGG - Terbium Gallium Garnet
- TGG is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.
-
Introduction
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.
CASTECH's magneto-optical crystal TGG is featured by • Large Verdet constant (35 Rad T-1 m-1)
• High thermal conductivity (7.4 W m-1 K-1)
• High laser damage threshold (> 1 GW/cm2)
Table 1. Basic Properties
Chemical Formula |
Tb3Ga5O12 |
Lattice Parameter |
a = 12.355 Å |
Growth Method |
Czochralski |
Density |
7.13 g/cm3 |
Melting Point |
1725℃ |
Mohs Hardness |
8 Mohs |
Refractive Index |
1.954 @1064 nm |
Specifications of TGG crystal from CASTECH
Table 2. Specifications
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 |