Li:Nb:O3 is a low cost crystal with good physical and mechanical properties. LiNb:O3 wedges are widely used in fiber isolators and circulators.
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Dimension tolerance | ±0.05mm |
Wedge Angle tolerance | ±0.1° |
Optical axis orientation | ±0.5° |
Flatness | λ/4 @ 632.8nm |
Surface Quality | 20/10 |
AR-coating | R<0.2% @ 1550nm±40nm |
Crystal Structure | Trigonal, Space group R3c, Point group 3m |
Melting Point | 1253℃ |
Mohs Hardness | 5 |
Density | 4.64g/cm3 |
Deliquescence | None |
Optical Homogeneity | ~5×10-5/cm |
Transparency Range | 420nm-5200nm |
Absorption Coefficient | ~0.1%/cm @ 1064nm |
Refractive indices at 1064nm | ne = 2.146, no = 2.220 @ 1300 nm ne = 2.156, no = 2.232 @ 1064 nm ne = 2.203, no = 2.286 @ 632.8 nm |
Thermal Expansion Coefficients(at 25℃) | //a, 2.0×10-6/K //c, 2.2×10-6/K |
Thermal Conductivity Coefficient | 38 W/m/K at 25℃ |
Thermal Optical Coefficient | dno/dT=-0.874×10-6/K at 1.4 μm dne/dT=39.073×10-6/K at 1.4 μm |
The Sellmeier equations(λ in μm) | no2 = 4.9048 + 0.11768/(λ2-0.04750) – 0.027169λ2 ne2 = 4.5820 + 0.099169/(λ2-0.04443) – 0.02195λ2 |