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LiNbO3 Crystals for EO Applications

  • Off-the-shelf and customized crystals 
  • Low Half Wave Voltage 
  • High Electro-Optical Coefficients
  • Laser grade polishing, AR coating and Cr-Au electrodes
  • Brewster angle cut LiNbO3 crystals for low amplification laser
  • Applications: Electro-optic pockels cells, Q-switches and phase modulators


Inquire for custom product  
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 have many 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 a variety of applications as: Surface Acoutic Waver (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) ect.. 

The lithium niobate crystals (LiNbO3) have stable physical and chemical properties, are easy to process. Lithium niobate crystals have a wide light transmission range (0.3 - 5 μm) and a large electro-optic coefficients, which makes it become one of the most common used materials for EO pockels cells, optical modulators and phase modulators with advantage of low half-wave voltage and zero residul birefringence. LiNbO3 has a draw back of low damage threshold, LiNbO3 pockels cells and modulators are fit for the low and middle-power laser systems. The damage threshold could be improved by MgO doping in LiNbO3, MgO:LiNbO3 has a higher damage threshold and could be used 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 pieces of LiNbO3 crystals are under strict test and quality control, the AR coating and Cr-Au electrode are available upon requesst. 

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 bruster 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