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Lithium Niobate - LiNbO3 Crystal Material
LiNbO3 crystal combines low cost, good mechanical and physical properties as well as high optical homogeneity. Therefore, LiNbO3 wedges have been widely used in fiber isolators and circulators.
Crystro provides:
Basic Properties of LiNbO3
| Crystal Sturucture | Trigonal, Space group R3c, Point group 3m |
| Melting Point | 1253℃ |
| Mohs Hardness | 5 |
| Density | 4.64g/cm3 |
| Deliquescence | None |
| Optical Homogeneity | ~5x10-5/cm |
| Transparency Range | 420-5200nm |
| Absorption Coefficient | ~0.1%/cm @1064nm |
| Refractive Indices at 1064nm | ne=2.146, no=2.220@1300nm ne=2.156, no=2.232@1064nm ne=2.203, no=2.286@632.8nm |
| Thermal Expansion Coefficients (at 25℃ ) | //a,2.0x10-6/K //a,2.2x10-6/K |
| Thermal Conductivity Coefficients | 38 W/m/K at 25℃ |
| Thermal Optical Coefficients | dno/dT=-0.874 x 10-6/K at 1.4μm dne/dT=39.073 x 10-6/K at 1.4μm |
| 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 |
Specifications of LiNbO3 wedges
| Aperture | 1.0 x1.0 mm2 to 4 x 4 mm2 |
| 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 |
| Standard Size | 1.25mmx1.25mmx0.5mm with 13º or 15º wedge, phi=22.5º |
Note: Other sizes and coatings are available upon request.
