LiNbO3 crystals are widely used as frequency doubling for wavelengths 1m and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to their large
LiNbO3 crystals
LiNbO3 crystals are widely used as frequency doubling for wavelengths 1m and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to their large
LiNbO3 crystals are widely used as frequency doubling for wavelengths >1μm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to their large Electro-Optic(E-O) and Acousto-Optic (A-O) coefficients.
LiNbO3 crystals are the most commonly used material for pockel cells, Q-switches and phase modulators, waveguide substrates, surface acoustic wave (SAW) wafers, etc.LiNbO3 crystals are widely used as frequency doubling for wavelengths >1μm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to their large Electro-Optic(E-O) and Acousto-Optic (A-O) coefficients.
LiNbO3 crystals are the most commonly used material for pockel cells, Q-switches and phase modulators, waveguide substrates, surface acoustic wave (SAW) wafers, etc.
Physical and Optical Properties：
| Crystal Structure | Trigonal, space group R3c |
| Cell Parameters | a=0.515,c=13.863,Z=6 |
| Melting Point | 1255 +/-5℃ |
| Curie Point | 1140 +/-5℃ |
| Mohs Hardness | 5 |
| Density | 4.64 g/cm 3 |
| Absorption Coefficient | ~ 0.1%/cm @ 1064 nm |
| Solubility: | insoluble in H2O |
| Relative Dielectric Constant | εT11/ε0: 85 εT33/ε0:29.5 |
| Thermal Expansion Coefficients at 25℃ | ||a, 2.0 x 10 -6/K @ 25℃ ||c, 2.2 x 10 -6/K @ 25℃ |
| Thermal Conductivity | 38 W /m /K @ 25℃ |
| Transparency Range | 420 – 5200 nm |
| Refractive Indices | n e = 2.146, n o = 2.220 @ 1300 nm n e = 2.156, n o = 2.322 @ 1064 nm n e = 2.203, n o = 2.286 @ 632.8 m |
| Optical Homogeneity | ~ 5 x 10 -5 /cm |
| Sellmeier Equations( l in m m) | n o 2 (l ) = 4.9048+0.11768/(l2- 0.04750) – 0.027169l2 n e 2 ( l) = 4.5820+0.099169/( l2 – 0.04443) – 0.021950 l2 |
| Crystal Structure | Trigonal, space group R3c |
| Cell Parameters | a=0.515,c=13.863,Z=6 |
| Melting Point | 1255 +/-5℃ |
| Curie Point | 1140 +/-5℃ |
| Mohs Hardness | 5 |
| Density | 4.64 g/cm 3 |
| Absorption Coefficient | ~ 0.1%/cm @ 1064 nm |
| Solubility: | insoluble in H2O |
| Relative Dielectric Constant | εT11/ε0: 85 εT33/ε0:29.5 |
| Thermal Expansion Coefficients at 25℃ | ||a, 2.0 x 10 -6/K @ 25℃ ||c, 2.2 x 10 -6/K @ 25℃ |
| Thermal Conductivity | 38 W /m /K @ 25℃ |
| Transparency Range | 420 – 5200 nm |
| Refractive Indices | n e = 2.146, n o = 2.220 @ 1300 nm n e = 2.156, n o = 2.322 @ 1064 nm n e = 2.203, n o = 2.286 @ 632.8 m |
| Optical Homogeneity | ~ 5 x 10 -5 /cm |
| Sellmeier Equations( l in m m) | n o 2 (l ) = 4.9048+0.11768/(l2- 0.04750) – 0.027169l2 n e 2 ( l) = 4.5820+0.099169/( l2 – 0.04443) – 0.021950 l2 |
Some applications of pure LN crystal are limited by its relative low optical damage threshold. While when doped with 5mol% magnesium oxide, MgO:LN crystal shows 1-2 orders of magnitude increase in optical damage threshold, coercive field for domain reversal also decreases from 21KV/mm to 6KV/mm below, UV-absorption edge position shifts to 310nm and OH-infrared absorption peak to 3535cm-1,which greatly develops the application of LN crystal.
We can provide MgO:LN crystal wafers, crystal blocks and bars with various specifications. Crystal defects and distributions of refractive index are strictly examined.
Applications: Quasi-phase Matching for SHG and OPO
Orientation
Z-cut±0.2°
Diameter
76.2mm±0.3mm
Orientation Flat(OF)
22mm±2mm
Perpendicular to X±0.2°(⊥)
Second Refer Flat(RF)
10mm±3mm
Cw270°±0.5°from OF
Cw315°±0.5°from OF
Thickness
50μm±5μm
1000μm±5μm
Surface
Double sides polished
S/D 20/10
TTV
≤6μm
WARP
≤20μm
Concentration
4.9-6mol%
Refraction Index
No=2.2827±0.0003
Ne=2.1928±0.0003
Prism coupler method @632.8nm, Doped 5mol%
Edge Beveling
Edge rounding
Pure congruent lithium niobate biggest drawback is that laser damage threshold is very low, which limits its applications. When mixed with 5mol% MgO after the grown MgO: LN crystal laser damage threshold increased 1-2 orders of magnitude, from 21KV/mm poling voltage drops 6KV/mm, violet absorption edge moved 310mm, OH-absorption peak red shifted to 3535cm -1, these changes greatly expanded the scope of application of the LN crystal.