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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 |
