Optical Grade Lithium Niobate Wafers
Application of Optical Grade Lithium Niobate Wafers
Optic Isolators.
Periodically poled lithium niobate (PPLN) waveguides.
EO Phase Modulators.
Optical Modulator.
- Electro-optic Q-switches.
Advantages of Optical Grade LiNbO3 Wafer
Stable mechanical properties.
Good machinability.
Heat and corrosion resistance.
High electro-optic and high nonlinear optic coefficients.
Ability of Optical Grade Lithium Niobate Wafers
Diameter: 2”, 3”, 4”.
Orientations: X, Y, Z etc.
Thickness: 0.25mm, 0.5 mm, 1.0 mm etc.
Available items: crystal wafers, congruent lithium niobate (CLN) wafers, near-stoichiometric lithium niobate (SLN) wafers, Tm/Pr/Er/Fe/MgO doped LiNbO3 wafers, boules, blanks and customized optics.
Why Choose Our Optical Grade LiNbO3 Wafers?
Strictly Optical Grade: Unlike cheaper SAW-grade materials, our wafers are specifically grown and processed to ensure high homogeneity, eliminating optical scattering for laser and photonics applications.
Exceptional Electro-Optic Properties: Perfect for manufacturing high-speed Mach-Zehnder modulators, phase shifters, and periodically poled (PPLN) devices.
CMP Polished Surfaces:Epi-ready, double-side polished (DSP) or single-side polished (SSP) with Ra < 0.5 nm to support integrated thin-film lithium niobate (TFLN) processes.
Custom Doping Available:We offer Magnesium-doped (MgO:LiNbO3) wafers to significantly increase the optical damage threshold for high-power laser systems.
| Product Parameters of Optical Grade Lithium Niobate Wafers | ||
| Material | LiNbO3 single crystal | |
| Curie Temp | 1142±2.0℃ | |
| Cutting Angle | X/Y/Z etc | |
| Orientation Tolerance (±) | ≤15′ | |
| Diameter | 2”/3”/4” | |
| Diameter Tolerance (±) | ≤0.20 mm | |
| Thickness | 0.18 ~ 0.5mm or more | |
| Thickness Tolerance (±) | ≤0.025 mm | |
| Primary Flat Length | 16mm/22mm/32mm | |
| TTV | <1~5 µm | |
| BOW | ± (25~40 um) | |
| Warp | <= 35 µm | |
| Orientation Flat | According to our standards or your requests | |
| Surface Type | Single side polished(SSP)/double sides polished(DSP)/double sides lapped(DSL) | |
| Polished Side Ra | <0.5nm | |
| Polished Side Surface Quality | S/D 20/10 | |
| Lapped Side Ra | General is 0.2-0.5 um or as customized | |
| Edge Criteria | Compliant with SEMI M1.2 Standard/refer to IEC62276 | |
| Quality | Free of crack (bubbles and inclusions) | |
| Optical Doped | Er/Fe/MgO etc | |
| Wafer Surface Criteria | Refractive index | No=2.2878/Ne=2.2033@632nm wavelength/prism coupler method. |
| Contamination | None | |
| Particles φ>0.3 um | <= 30 | |
| Scratch , Chipping | None | |
| Defect | No edge cracks, scratches, saw marks, stains | |
| Packaging | Qty/Wafer box | 25pcs per box |
| Product Parameters of Optical Grade Lithium Niobate Wafers | |||
| Material | Grade | Diameter | Growth direction |
| LiNbO3 | optical | 2”/3”/4” | X/Y/Z/Y135 etc |
| MgO:LiNbO3 | optical | 2”/3” | X/Z |
| Fe:LiNbO3 | optical | 2”/3” | Z |
| Tm:LiNbO3 | optical | 2”/3” | Z |
| Pr:LiNbO3 | optical | 2”/3” | Z |
| Er:LiNbO3 | optical | 2”/3” | X/Z |
| Properties of Optical Grade Lithium Niobate Wafers | |
| Growth method | Czochralski method |
| Crystal structure | M3 |
| Lattice Constant | a=b=5.148 Å c=13.863 Å |
| Melting point (℃) | 1250 |
| Density(g/cm3) | 4.64 |
| Hardness | 5 (Mohs) |
| Refractive index | no=2.286 ne=2.203 at 632.8nm |
| Nonlinear coefficient | d33=34.45, d31=d15=5.95, d22=13.07 (pmv-1) |
| Electro-optical coefficient | γ13=8.6, γ22=3.4, γ33=30.8, γ51=28.0, γ22=6.00 (pmv-1) |
| Optical transmittance | 370 ~ 5000nm and >68% at 632.8nm |
| Thermal expansion | a11=15.4×10^-6/K, a33=7.5×10^-6/K |
Q: What is the main difference between Optical Grade and SAW Grade Lithium Niobate?
A: Optical grade LiNbO3 is grown with extreme precision to ensure uniform refractive indices and eliminate structural defects, making it strictly suitable for light transmission. SAW (Surface Acoustic Wave) grade is optimized only for acoustic properties and often has high optical scattering, making it unsuitable for photonics.
Q: Do you provide MgO-doped Lithium Niobate wafers?
A: Yes. We supply MgO-doped LiNbO3 wafers which are highly resistant to photorefractive damage, making them the preferred choice for high-power optical applications and non-linear frequency conversion.
Q: Can I order small batches for my university research project?
A: Absolutely. ATR Crystal frequently partners with academic institutions and boutique importers globally, offering flexible MOQs (Minimum Order Quantities) to support scientific research.
