Description
Introduction
Lithium Niobate (LiNbO3 or LN) is widely used as frequency doublers for wavelength ˃ 1µm, optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Additionally due to its large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients, LiNbO3 crystal is the most commonly used material for Pockel cells, Q-switches and phase modulators, waveguide substrates, and surface acoustic wave (SAW) wafers, etc. We can provide LiNO3 crystals with high quality and large size for all these applications.
- 50,000 to 100,000 pcs/month of LiNbO3 wedges used for fiber optical isolators and circulators
- Strict quality control
- Technical support
- Fast delivery
- Competitive price
Basic Properties
| Table 1. Chemical and Physical Properties | |
| Crystal Structure | Trigonal, Space group R3c, Point group 3m |
| Lattice Parameter | a = 5.148 Å, c = 13.863 Å |
| Melting Point | 1253℃ |
| Curie Temperature | 1140℃ |
| Mohs Hardness | 5 Mohs |
| Density | 4.64 g/cm3 |
| Elastic Stiffness Coefficients | CE11 = 2.33 ( × 1011 N/m2)
CE33 = 2.77 ( × 1011 N/m2) |
| Table 2. Optical and Nonlinear Optical Properties | |
| Transparency Range | 420-5200 nm |
| Optical Homogeneity | ~5 ×10-5 /cm |
| Refractive Indices | 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 |
| NLO Coefficients | d33 = 86 × d36 (KDP) = 37.84 pm/V
d31 = 11.6 × d36 (KDP) = 5.10 pm/V d22 = 5.6 × d36 (KDP) = 2.46 pm/V |
| Effective NLO Coefficients | deff (I) = d31sinθ – d22cosθsin3Φ
deff (II) = d22cos2θ cos3Φ |
| Sellmeier Equations (λ in μm) | no2 = 4.9048 + 0.11768 / (λ2 – 0.04750) – 0.027169 λ2
ne2 = 4.5820 + 0.099169 /(λ2 – 0.04443) – 0.02195 λ2 |
| Damage Threshold | 100 MW/cm2 (10 ns, 1064 nm) |
| Table 3. Thermal and Electrical Properties of LiNbO3 | |
| Thermal Conductivity | 38 W/m/K @25 ℃ |
| Thermal Expansion Coefficients (at 25℃) | //a, 2.0 × 10-6 /K
//c, 2.2 × 10-6 /K |
| Resistivity | 2×10-6 Ω·cm @200 ℃ |
| Dielectric Constants | εS11/ε0 = 43, εT11/ε0 = 78
εS33/ε0 = 28, εT33/ε0 = 32 |
| Piezoelectric Strain Constant | D22 = 2.04 × 10-11 C/N
D33 = 19.22 × 10-11 C/N |
| Electro-Optic Coefficients | γT33 = 32 pm/V, γS33 = 31 pm/V,
γT31 = 10 pm/V, γS31 = 8.6 pm/V, γT22 = 6.8 pm/V, γS22 = 3.4 pm/V |
| Half-Wave Voltage, DC
Electrical field // z, light ⊥ z; Electrical field // x or y, light // z; |
3.03 KV 4.02 KV |
| Table 4. Specifications | |
| Dimension Tolerance | (W ± 0.1 mm) × (H ± 0.1mm) × (L ± 0.2mm) |
| Clear Aperture | Central 90% of the diameter |
| Surface Quality (Scratch/Dig) | 20/10 to MIL-PRF-13830B |
| Flatness | λ/8 @633 nm |
| Transmitted Wavefront Distortion | ≦λ/4 @633 nm |
| Parallelism | 20 arc sec |
| Perpendicularity | ≦15 arc min |
| Angle Tolerance | ≦±0.5° |
| Quality Warranty Period | One year under proper use |
Provides the following AR-coatings:
- Dual Band AR-coating (DBAR) at 1064/532 nm on both surface, with low reflectance (R<0.2% @1064 nm and R<0.5% @532 nm)
- AR-coating and gold/chrome plated on side faces for E-O applications
- Other coatings are available upon request
