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Introduction:
Lithium Niobate (LiNbO3) is a ferroelectric material suitable for a variety of applications.
Its versatility is made possible by the excellent Electro-Optic, nonlinear, and piezoelectric properties of the intrinsic material. The boules are typically grown in Czochralsky method.
Basic Properties of LiNbO3:
|
Crystal Structure: |
Trigonal |
|
Space Group: |
3m |
|
Cell Parameters: |
a=b=5.148Å , c=13.863Å |
|
Melting Point: |
1253° C |
|
Curie Temperature: |
1140° C |
|
Mohs Hardness: |
5 |
|
Density: |
4.64 g/cm3 |
| Hygroscopic Susceptibility |
None |
|
Optical Homogeneity |
5x10-5/cm |
|
Transparency Range |
420nm-5200nm |
|
Absorption Coefficient: |
~0.1%/cm @ 1064nm |
|
Refractive indices at 1064nm: |
ne = 2.146, no = 2.220 @ 1300 nm ne = 2.156, no = 2.232 @ 1064 nm ne = 2.175, no = 2.254@ 808nm ne = 2.203, no = 2.286 @ 632.8 nm ne = 2.234, no = 2.323@ 532nm |
|
Thermal Expansion Coefficient:
|
//a, 15.4x10-6/K |
|
//c, 7.5x10-6/K |
|
|
Thermal Conductivity Coefficient:
|
0.056 W/cm.K |
|
Thermal Optical Coefficient: |
dno/dT=-0.874x10-6/K at 1.4μm dne/dT=39.073x10-6/K at 1.4μm |
|
The Sellmeier equations(λin μm) |
no2 = 4.9048 + 0.11768/(λ2-0.04750)-0.027169λ2 ne2 = 4.5820 + 0.099169/(λ2-0.04443)-0.021950λ2 |
Nonlinear Optical Properties:
|
NLO Coefficients (1064nm) |
d33 = -34.4 pm/V, d31 = d15 = -5.95 pm/V, d22 = 3.07 pm/V |
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Electro-Optic Coefficients |
|
||||
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Half-Wave Voltage, DC |
Electrical field ||z, light || x or y: |
Electrical field || x or y, light ||z: |
|||
|
~ 3 KV |
~ 4 KV |
||||
|
Damage Threshold |
~ 100 MW/cm2 |
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Main features
- Broad transparency region from 420 nm to 5200 nm
- High nonlinear, electro-optic and acousto-optic coefcients
- Nonhygroscopic, mechanically, and chemically stable
Application
- Electro-optic modulation and Q-switching
- Optical parametric oscillators (OPO) , Second Harmonic Generation (SHG)
- Frequency mixing (DFG) to generate tunable infrared wavelengths
LiNbO3’s Specifications:
Material: Laser grade congruent LiNbO3 or 5%MgO:LiNbO3
Orientation: ± 30 arcmin
Dimensional Tolerance: ± 0.1mm
Surface quality: 40/20 Scratch/Dig
Flatness: λ/6 at 633 nm
Perpendicularity: 15 arc min
Parallelism: better than 20 arc sec
Clear Aperture: > Central 90%
AR Coating: uncoated, or upon request
关键词：
电光开关 | 非线性晶体 | 光学镜片 | 激光晶体 | 器件
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