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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-1m-1)
• High thermal conductivity (7.4 W m-1K-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
-
TGG - Terbium Gallium Garnet
- 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.
-
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-1m-1)
• High thermal conductivity (7.4 W m-1K-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 |
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