Product Description
Lithium niobate crystal is a good piezoelectric conversion material, ferro-electric materials, electric and optical materials. As electro-optical materials in optical communication, it is widely used in parametric oscillator, double frequency, acoustic and optical devices, and optical modulator. The doping of MgO can effectively improve the damage threshold of the crystal.
Main Advantages:
Very small chirp effect
High modulation bandwidth
High extinction ratio
Stable chemical and physical properties
Typical applications:
Acoustic surface wave filter
Separator
Narrow band filter
Sensors
Photon tunable filter
Acoustic and optical devices
Optical gyroscope
Optical waveguide
Optical switches
Optical modulation direction coupler
Optical communication modulator
Interferometer converter
High-speed long-distance communication
Material Properties
| Crystal Structure | Trigonal |
| Lattice constant | a=0.515Å, c=13.863Å, Z=6Å |
| Melting Point | 1250±5℃ |
| Curie Point | 1140±5℃ |
| Mohs Hardness | 5 |
| Density | 4.64 g/cm3 |
| Deliquescence | No |
| Dielectric Constant | ε11/ε0=85; ε33/ε0=29.5 |
| Thermal Expansion Coefficient | a1=a2=2×10-6/℃, a3=2.2×10-6/℃ at 25℃ |
| Thermal Conductivity | 38 W /m /K @ 25℃ |
| Transmission Range | 370-5000nm |
| Piezoelectric Constant | d22=2.04×10-11C/N,d33=0.6×10-11C/N,d15=7×10-11C/N，d31=-0.1×10-11C/N |
| E-O Coefficient | gT33=32pm/V, gS33=31pm/V；gT31=10pm/V, gS31=8.6pm/V；gT22=6.8pm/V, gS22=3.4pm/V |
| Refractive Indices | no=2.2827 ± 0.0003 ne=2.1928± 0.0003 |
Technical Parameter
Crystro Offers:
| Size | 4", 6" Boule or wafer, Acoustic or Optical grade |
| Doping | No Doping or With Mg |
| Boule Length | ≥50mm |
| Wafer Thickness | 0.25，0.35，0.50(mm) or upon request |
| Orientation | Y42°/Y36°/Y128°/X/Y/Z or Upon Request |
| Surface Process | Single/Double Sides Polishing |
| TTV | < 10µm |
| BOW | ± (25µm ~40µm) |
| Warp | ≤35µm |
| Flat Width | 32.0±2.0（mm) or Upon Request |
| Roughness | Ra≤10Å |
| Chamfer | 0.1mm@45°or round edge |
