Iron Doped Lithium Niobate
Product DescriptionDeltronic Crystal’s Iron-Doped Lithium Niobate is one of the most preferred photorefractive materials due to its superior photorefractive properties.
Iron-Doped Lithium Niobate is a ferroelectric crystal with the paraelectric to ferroelectric phase transition around 1143 C°. Boules are electrically poled along the Z-axis to align antiparallel domains of the spontaneous polariztion.
Deltronic Crystal regularly grows large diameter boules of iron-doped lithium niobate for photorefractive applications. Lithium niobate is chemically stable at room temperature and is generally non-reactive to most solvents.
Applications
Features
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| Property at 25°C | Value |
| Empirical Formula | LiNbO3:Fe |
| Congruent Melt Composition | 48.6 mole % Li2O |
| Congruent Melting Point (°C) | 1253 |
| Crystal Structure | trigonal |
| Space Group | R3c |
| Bandgap (eV) | 3.7 |
| Point Group | 3m |
| Curie Temperature (°C) | 1143 |
| Density (g-cm-3) | 4.612 |
| Hardness (moh) | 5 |
| Thermal Expansion Coefficient (°C-1) | a = 16.7x10-6 |
| c = 2.0 x 10-6 | |
| Resistivity (ohm-cm) | > 1014 at 200°C |
| Lattice Constant (Å) | a = 5.1508 (hex) |
| c = 13.864 (hex) | |
| Spontaneous Polarization (Coul/m2) | 0.71 |
| Dielectric Constants | ås33 = 29 ås11 = 44 |
| ås33 = 30 åT11 = 84 | |
| Refractive index, 514.5nm | no = 2.2029, ne = 2.1476 |
| Refractive Index, 633nm | no = 2.2884, ne = 2.2019 |
| Refractive Index, 1064nm | no = 2.2340, ne = 2.1554 |
| Electro-optic Coefficients at 633nm | r13 = 9.6 r22 = 6.8 r33 = 30.9 |
| [pm/V] (constant tension) | r51 = 32.6 rc = 21.1 |
| Crystallographic Orientations, Dimensions, and Tolerances | |
| Standard Sizes | 10x10x10mm3, 0° cut and 45° cut |
| 10x10x20mm3, 0° cut and 45° cut | |
| Dimension Tolerances | ±0.1mm on polished faces |
| ±0.1mm on lapped faces | |
| Orientations | X-ray oriented within ±10 arc-minutes |
| Flatness | <λ/10 at 633nm |
| Surface Quality | <10/5 (scratch/dig) |
| Edges | 0.1 to 0.15mm chamfer at 45° |
| Parallelism | <10 arc-minutes |
| Anti-reflective Coatings | Specify |
| Other Dopants | Specify |
| Fe Standard Dopants | 0.015, 0.03, 0.05, 0.10 mole% |