KTF – Potassium Terbium Fluoride
Comparison of Products | ||
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Composition | TGG Tb3Ga5O12 |
KTF KTb3F10 |
Crystal structure | cubic | cubic |
Transparency range (rad/Tm) | 400 - 1500nm | 400 - 1500nm |
Verdet constant, 1064nm (rad/T•m) | 39 | 36 |
Refractive index at 1064nm | 1.944 | ~1.5 (in process) |
Density (g/cc) | 7.2 | 5.86 |
Absorption at 1064nm | ~0.16%/cm | ~0.02%/cm |
Thermo-optic coefficient (dn/dT) | 17.9x10-6K-1 | ~1x10-6/K |
Nonlinear refractive index | ~2x10-19m2/W | ~1x10-20m2/W |
Thermal conductivity (W/m•K) | 7.4 | 1.67 |
Thermal expansion x 10-6°C-1 | 7.3 | 13.7 |
KTF - General Specifications | |
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Crystal axis orientation: | <100> standard <111> available111>100> |
Diameter Tolerance: | +0.000" / -0.002" |
Chamfer: | 0.005" ± 0.003" @ 45° |
Barrel Finish: | 55μinches |
Perpendicularity: | within 10arc minutes |
Parallelism: | 60arc-seconds or less |
Rod End Face Flatness: | within λ/10 wave at 633 nm wavelength |
Surface Quality: | 10-5 |
Wave Front Distortion: | less than 1/4 wave per inch of length (measured at 633nm) |
Standard Coating: | Anti-Reflection with R ‹ 0.25% |
For more information contact the Sales Team: E-mail | (704) 588-2340
TGG (Terbium Gallium Garnet)
Applications | |
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Faraday Rotators and Isolators | |
Advantages | |
TGG has twice the Verdet constant of a terbium-doped glass. | |
Thermal conductivity is an order of magnitude greater than typical glass. |
|
Optical losses are lower for TGG than Tb-doped glasses. | |
Material Properties | |
Formula: | Tb3Ga5O12 |
Crystal Structure: |
[111] |
Extinction Ratio (over 2/3 clear aperture): | 30 dB |
Verdet Constant (632nm): | -134RadT-1m-1 |
Verdet Constant (1064nm): | -40RadT-1m-1 |
Thermal Conductivity: | 7.4Wm-1K-1 |
Refractive Index: | 1.95 |
Nonlinear Index, n2: |
8.0 |
Figure of Merit, V/a: | 27 |
Figure of Merit, V/n2: |
5 |
Northrop Grumman SYNOPTICS
1201 Continental Boulevard
Charlotte, NC 28273
Phone: 704-588-2340 | Fax: 704-583-5851
Email