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LiTaO3

LiTaO3 is an E-O crystal widely used for E-O devices, due to its good optical NLO and E-O properties, as well as high damage threshold. CASTECH supplies high quality LiTaO3 boules and wafers with the following specifications for standard applications. We can also offer other specifications upon request.


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Basic Properties of LiTaO3

 

Crystal StructureTrigonal, Space group R3c, Point group 3m         
Cell Parametersa=5.154?,c=13.781?
Melting Point1650℃
Curie Temperature607℃
Mohs Hardness5.5
Density7.46g/cm3
Dielectric Constants

ε110:51.7

ε330:44.5

Elastic Stiffness Coefficients

CE11:2.33(×1011N/m2

CE33:2.77(×1011N/m2

Piezoelectric Strain Constants

d22:2.4(×10-11C/N)

d33:0.8(×10-11C/N)

Transmission range400-4500nm
Electro-optical coefficientsr33=30.4pm/V
Refractive index at 632.8nm          no=2.176,ne=2.180

 

Typical Specifications:

 

                                    Type

Specifications

BouleWafer
DiameterΦ3″Φ3″Φ4″
Length or Thickness≤100mm≤50mm0.35-0.5mm
Orientation127.86°Y,64°Y,135°Y,X,Y,Z,and other cut      
Ref. Flat OrientationX,Y
Ref. Flat Length22±2mm2mm22±2mm32±2mm
Front Side PolishingMirror polished 5-15?
Back Side Lapping0.3-1.0μm
Flatness(μm)≤15
Bow(μm)≤25

 

 

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