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LiNbO3 Crystals for EO Applications


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Code Material Size Orientation Coating Unit Price Delivery Cart
2043-001 LiNbO3 9x9x18.8mm Z-cut AR/AR@1064nm Cr+Au electrode $365 2-3 Days
2043-002 LiNbO3 9x9x25mm Z-cut AR/AR@1064nm Cr+Au electrode $365 2-3 Days
2043-003 LiNbO3 10x10x20mm Z-cut AR/AR@1064nm Cr+Au electrode $365 2-3 Days

Lithium niobate (LiNbO3) crystals demonstrate maltitude photoelectric effects, including piezoelectric effect, electro-optic effect, nonlinear effect, photorefractive effect, photovoltaic effect, and photoelastic effect, acousto-optic effects and other optoelectronic properties, for this, LiNbO3 has been used in various applications such as Surface Acoustic Wave (SAW) filters, Electro-optic (EO) pockels cells, Phase Modulators, Optical Modulators, Optical Isolators, Optical Parametric Oscillators (OPO), Difference-Frequency Generation (DFG), Second Harmonic Generation (SHG), etc. 

The lithium niobate crystals (LiNbO3) exhibit stable physical and chemical properties and are easy to process. Lithium niobate crystals have a wide light transmission range (0.3-5μm) and large electro-optic coefficients, which render them one of the most commonly used materials for EO pockels cells, optical modulators, and phase modulators with the advantage of low half-wave voltage and zero residual birefringences. However, LiNbO3 has a drawback of low damage threshold, therefore LiNbO3 pockels cells and modulators are fit for low and middle-power lasers. The damage threshold could be improved by MgO doping in LiNbO3, MgO:LiNbO3 has a higher damage threshold and could be utilized in high-power lasers.

Hangzhou Shalom EO offers off-the-shelf and custom LiNbO3 crystals and MgO:LiNbO3 crystals used for EO application of pockels cells and optical modulators, every piece of LiNbO3 crystals are under strict supervision and quality control, the AR coatings and Cr-Au electrodes are available upon request. A series of lithium-niobate products including SAW LiNbO3 WafersNonlinear LiNbO3 and MgO:LiNbO3MgO:LiNbO3 crystals for EO applicationOptical Grade LiNbO3 Wafers, and MgO:PPLN CrystalsLiNbO3 Pockels Cells are also procurable.


 

Common Specifications:

Crystal Materials LiNbO3 crystals Size  Customized 
Size Tolerance +/-0.1mm Length Tolerance +/-0.2mm
Surface Quality 20/10 S/D Parallelism <20 arc seconds
Flatness < Lambda/10 @633nm Chamfer 0.1-0.3mmx45°
Chips <0.15mm Side Surface Fine ground
Orientation Tolerance < 10 arc minutes Wavefront Distortion <Lambda/4@633nm
Extinction Ratio >200:1 Coating AR/AR@1064nm or customized
Damaging Threshold  >100mW/cm^2@1064nm 10nS 10Hz pulse Electrode on Side Surface Chrome gold electrode (Cr+Au)

 

Basic Properties:

Crystal Structure Trigonal, space group R3c Cell Parameters a = 5.15 Ang, c = 13.863Ang.,  Z = 6
Melting Point 1255±5℃ Curie Point 1140±5℃
Mohs Hardness 5 Density 4.64 g/cm3
Absorption Coefficient ~ 0.1%/cm @ 1064nm Solubility insoluble in H2O
Relative Dielectric Constant eT11/e0: 85
eT33/e0: 29.5
Thermal Expansion Coefficients( @ 25℃) ||a, 14.1 x 10-6 /K ||c, 4.1 x 10-6 /K
Thermal Conductivity 38 W /m /K @ 25℃

 

Linear Optical Properties:

Transparency Range 420-5200nm Optical Homogeneity ~ 5 x 10-5 /cm
Refractive Indices ne=2.146, no = 2.220 @ 1300nm
ne= 2.156, no = 2.232 @ 1064nm
ne= 2.203, no = 2.286 @ 632.8nm
Sellmeier Equations
(λ in mm)
n2o (l) = 4.9048+0.11768/(l2 - 0.04750) - 0.027169l2
n2e (l) = 4.5820+0.099169/(l2 - 0.04443) - 0.021950l2

 

Nonlinear Optical Properties:

NLO Coefficients d33 = 34.4 pm/V
d31 = d15 = 5.95 pm/V
d22 = 3.07 pm/V
Efficiency NLO Coefficients deff =5.7 pm/V or ~14.6 x d36 (KDP)
for frequency doubling 1300nm
deff =5.3 pm/V or ~13.6 x d36(KDP)
for OPO pumped at 1064nm
deff =17.6 pm/V or ~45 x d36(KDP)
for quasi-phase-matched structure
Electro-Optic Coefficients gT33 = 32 pm/V, gS33 = 31 pm/V
gT31 = 10 pm/V, gS31=8.6 pm/V
gT22 = 6.8 pm/V, gS22= 3.4 pm/V
Half-Wave Voltage, DC
Electrical field||z, light ^z
Electrical field||x or y, light||z
3.03 KV
4.02 KV

LiNbO3 crystals with brewster angle:

LiNbO3 Z-Cut, 9x9x18.8mm, Rectangular, Au electroded for EO applications

LiNbO3 Z-Cut, 9x9x18.8mm, Rectangular, Au electroded for EO applications

LiNbO3 Z-Cut, 9x9x25mm, Rectangular, Au electroded for EO applications

LiNbO3 Z-Cut, 9x9x25mm, Rectangular, Au electroded for EO applications

LiNbO3 Z-Cut, 10x10x20mm, Rectangular, Au electroded for EO applications

LiNbO3 Z-Cut, 10x10x20mm, Rectangular, Au electroded for EO applications