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KTF crystal has lower absorption coefficient and thermo-optic coefficient. This crystal is very suitable for high-power Faraday rotator and optical isolator.
Product Description
KTF crystal has lower absorption coefficient and thermo-optic coefficient. This crystal is very suitable for high-power Faraday rotator and optical isolator.
Main Features
Wide wavelength coverage: 500nm-3000nm
large crystal size
High coating threshold
good uniformity
Material Properties
| Crystalline orientation | Regular <100> |
| Diameter Tolerance | + 0.00/-0.0 5mm |
| Chamfer | ≦0. 15mm @ 45° |
| roll off | fine grinding |
| Perpendicularity | ≤ 10 ′ |
| Parallelism | ≤ 6 0″ |
| Face type | ≤λ/10 @633nm |
| surface finish | 10-5 |
| through wavefront error | ≤λ /4 /25.4mm @633nm |
| coating | A R , R ≦0.25% |
TGG and KTF
| Material | TGG Tb 3 Ga 5 O 12 | KTF KTb 3 F 10 |
| Lattice structure | cube | cube |
| Through the spectral range | 400-1500nm | 400-1500nm |
| Verdet constant, 1064nm | 39 | 36 |
| Refractive index, 1064nm | 1.944 | ~1.5 |
| Density (g/cc) | 7.2 | 5.86 |
| Absorption, 1064nm | ~0.16%/cm | ~0.02%/cm |
| Thermo-optic coefficient ( dn/dT) | 17.9 x 10 -6 K -1 | ~1 x 10 -6 K -1 |
| nonlinear index of refraction | ~2 x 10-19 m 2 / W | ~1x 10 - 20 m 2 /W |
| Thermal conductivity (W/mK) | 7.4 | 1.67 |
| Thermal expansion×10 -6 ℃ -1 | 7.3 | 13.7 |
