LiTaO3 Crystals
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 boule and wafers with the following specifications for standard applications. We can also offer other specifications upon request.
Basic Properties of LiTaO3
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Crystal Structure:
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Trigonal, space group R3c,Point group 3m
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Cell Parameters:
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a=5.154?,c=13.781?
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Melting point
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1650℃
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Curie Temperature:
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607℃
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Mohs hardness:
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5.5
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Density:
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7.46 g/cm3
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Dielectric Constant:
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ξ11/ξ0: 51.7
ξ33/ξ0 :44.5
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Elastic Stiffness Coefficient:
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CE11 :2.33(X 1011 N/m2)
CE33 :2.77(X 1011 N/m2)
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Piezoelectric Strain Constant:
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d22 :2.4(X 10-11 C/N)
d33 :0.8(X 10-11 C/N)
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Transmission range:
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400-4500nm
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Electro-optical coefficients:
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r33= 30.4pm/V
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Refractive index at 632.8nm:
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no=2.176,ne=2.180
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Typical Specifications:
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Type
Specifications
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Boule
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Wafer
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Diameter
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Φ3"
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Φ4"
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Φ3"
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Φ4"
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Length or Thickness
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≤100
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≤50
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≤0.35-0.5
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Orientation
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127.86°Y, 64°Y, 135°Y,X,Y,Z, and other cut
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Ref.Flat Orientation
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X,Y
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Ref.Flat Length
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22±2mm
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32±2mm
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22±2mm
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32±2mm
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Front Side Polishing
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Mirror polished 5-15?
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Back Side Lapping
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0.3-1.0μm
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Flatness(μm)
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≤15
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Bow(μm)
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≤25
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