LiNbO3 crystal (lithium niobate LN) was one of the first nonlinear crystals synthesized for the frequency conversion. Although nowadays for the second harmonic generation there are more effective and damage resistant crystals like BBO, LBO or KTP, lithium niobate crystal finds its own field of application. When lithium niobate crystals are doped with MgO, ZnO or Fe2O3 the properties like photorefractive damage threshold could increase by several times.
Crystals available from stock
Description
Lithium niobate (LN) nonlinear crystal was one of the first nonlinear crystals synthesized for the frequency conversion. Although nowadays for the second harmonic generation (SHG) there are more effective and damage resistant crystals like BBO, LBO or KTP, lithium niobate crystal finds its own field of application. When lithium niobate crystals are doped with MgO, ZnO or Fe2O3 the properties like photorefractive damage threshold could increase by several times.
Specifications
Physical and Optical Properties
| Chemical formula | LiNbO3 (lithium niobate) |
| Optical symmetry | negative uniaxial (no > ne) |
| Crystal structure | trigonal |
| Lattice constants | a = 5.15 Å, c = 13.86 Å |
| Density | 4.62 g/cm3 |
| Mohs hardness | 5 – 5.5 |
| Melting point | 1257 °C |
| Refractive index (at 1064 nm) | no = 2.2321, ne = 2.1555 |
| Thermal conductivity coefficient (300 K) | K⊥c = 4.5 Wm-1K-1, K//c = 4.4 Wm-1K-1 |
| Specific heat (300 K) | C = 0.648 Jg-1K-1 |
| Termal expansion coefficient (300 K) | α⊥c = 15.7 x 10-6 °C-1, α//c = 4 x 10-6 °C-1 |
| Direct band-gap energy (293 K) | Eg = 4.0 eV |
| Transparency range | 330 – 5500 nm |
Standard manufacturing specifications
| Cut orientation error: | +/- 30 arcmin |
| Dimensions tolerance: | +/- 0.1 mm |
| Clear aperture: | > 85% of aperture dimensions |
| Surface quality: | 10-5 S-D |
| Surface flatness: | λ/10 @ 633 nm |
| Parallelism error: | < 20 arcsec |
| Perpendicularity error: | +/- 5 arcmin |
Nonlinear Applications
SHG @ 1064 nm, Type 1
| Type 1 | 1064(o) + 1064(o) → 532(e) |
| Phase matching angle (293 K) | Theta (θ) = 83.1° , Phi (φ) = 90° |
| Effective nonlinearity | deff = -4.72 pm/V |
| Walkoff angle | 9.2 mrad (532(e)) |
| Angular acceptance | 2.59 mrad x cm |
| Thermal acceptance | 1.04 K x cm |
Products
Product | Dimensions | Length | Doping | Coatings | Price | Quantity | |
|---|---|---|---|---|---|---|---|
| Fe-LiNbO3-10x10x1 | 10 x 10 mm | 1 mm | 0.05 % Fe2O3 | Uncoated | 545.00€ | | |
