Optical Grade Lithium Niobate Crystal And Wafer
Optical Grade Lithium Niobate Crystal And Wafer
Lithium niobate crystal is an important multifunctional crystal with good nonlinear optical properties and large nonlinear optical coefficient. Moreover, non-critical phase matching can be realized. As an electro-optical crystal, it has been used as an important optical wave-guide material. As a piezoelectric crystal, it can be used in the production of low frequency SAW filters, high power high temperature resistant ultrasonic transducers and so on. Doped lithium niobate materials are also widely used. Mg:LN can greatly improve the anti-laser damage threshold, and promote the application of lithium niobate crystals in the field of nonlinear optics. Nd:Mg:LN crystal, can achieve self-doubling effect; Fe:LN crystals can be used for holographic storage in optical volumes.
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 group3m |
| 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=0.6*10-11C/N,d15=7X10-11C/N，d31=-0.1X10-11C/N |
| Elastic Stiffness Constant | C11E=2.04*1011N/m2,C33E=2.46*1011N/m2, |
Optical Grade LiNbO3Wafer
| Orientation | X-cut | Z-cut |
| Diameter | 76.2mm±0.3mm 100.0mm±0.3mm | 76.2mm±0.3mm 100.0mm±0.3mm |
| Orientation Flat(OF) | 22mm±2mm 22mm±2mm Perpendicular to X ± 0.2° | 22mm±2mm 22mm±2mm Perpendicular toX±0.2° |
| Second Refer. Flat(RF) | Cw225°±0.5°from OF Cw315°±0.5°from OF | Cw225°±0.5°from OF Cw270°±0.5°from OF |
| Thickness | 500um±5um 1000um±5um | 500um ± 5um 1000um ± 5um |
| Surface Quality | Double sides polished S/D 20/10 | Double sides polished S/D 20/10 |
| TTV | ≤10um | |
| WARP | ≤50um | |
| Curie Temperature | 1142±0.7℃ | |
| Refractive Index | n0=2.2878±0.0002ne=2.2033±0.0002 prism coupler method @632.8nm | |
| Edge Beveling | Edge rounding | |
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