LiNbO3 Crystals is widely used as frequency doublers for wavelength > 1um and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to its large Elector-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 substrate, and surface acoustic wave (SAW) wafers, etc.
Applications:
Integrated Waveguide Photonics
Wave Guide Lasers
Polarizer for Optic Isolator
EO Waveguide Phase Modulators
EO Waveguide Amplitude Modulators
Quasi-phase Matching for SHG and OPO
Basic Properties
| Crystal Structure | Trigonal, point group 3m |
| Lattice Parameters | a=5.148?, c=13.863? |
| Density | 4.64g/cm3 |
| Melting Point | 1250℃ |
| Curie Point | 1142±2℃ |
| Mohs Hardness | 5 |
| Dielectric Constant | ε11/ε0=85; ε33/ε0=29.5 |
| Thermal Conductivity | 38W/m/℃ at25℃ |
| Thermal Expansion Coefficient | a1=a2=2×10-6/℃, a3=2.2×10-6/℃ at25℃ |
| Piezoelectric Strain Constant | d22=2.04×10-11C/N, d33=19.22×10-11C/N, |
| Elastic Stiffness Constant | C11E=2.04×1011N/m2, C33E=2.46×1011N/m2, |
SAW Grade LiNbO3 Wafer
| Orientation | 64°rot.Y-cut ± 0.2° | 127.86°rot.Y-cut ± 0.2° | Y-cut ± 0.2° |
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Diameter | 76.2mm ±0.3mm 100.0mm ±0.3mm | 76.2mm ±0.3mm 100.0mm ±0.3mm | 76.2mm ±0.3mm 100.0mm ±0.3mm |
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Orientation Flat (OF) | 22mm ±2mm 22mm ±2mm Perpendicular to X ± 0.2° | 22mm ±2mm 22mm ±2mm Perpendicular to X ± 0.2° | 22mm ±2mm 22mm ±2mm Perpendicular to X ± 0.2° |
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Second Refer. Flat (RF) | 10mm ±3mm Cw180° ± 0.5° from OF | 10mm ±3mm Cw225° ± 0.5° from OF | 10mm ±3mm Cw270° ± 0.5° from OF |
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Thickness | 500um ± 20um 350um ± 20um | 500um ± 20um 350um ± 20um | 500um ± 20um 350um ± 20um |
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Propagating surface | “+” side Ra ≤ 8 ? | “+” side Ra ≤ 8 ? | “+” side Ra ≤ 8 ? |
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Wafer backside | GC#1000lapped & etched 0.2um≤Ra≤0.7um | GC#1000lapped & etched 0.2um≤Ra≤0.7um | GC#1000lapped & etched 0.2um≤Ra≤0.7um |
| TTV | ≤ 10um | ||
| LTV | ≤ 2.0um within an area of 5 ×5mm2 | ||
| PLTV | ≥ 95% (3mmfrom edge excluded) | ||
| BOW | -25um ≤ Bow ≤ +25um | ||
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Curie Temperature | 1142℃ ± 3℃(DTA method) | ||
| Edge Beveling | Edge rounding | ||
Special specifications and requirements according to customer requirements
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