LiTaO3 結晶
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.
Basic Properties
| Crystal Structure: | Trigonal, space group R3c,Point group 3m |
| Cell Parameters: | a=5.154Å,c=13.781Å |
| Melting point | 1650℃ |
| Curie Temperature: | 607℃ |
| Mohs hardness: | 5.5 |
| Density: | 7.46 g/cm3 |
| Dielectric Constant: | ε11/ε0: 51.7 |
| Elastic Stiffness Coefficient: | CE11 :2.33(X 1011 N/m2) CE33 :2.77(X 1011 N/m2) |
| Piezoelectric Strain Constant: | d22 :2.4(X 10-11 C/N) d33 :0.8(X 10-11 C/N) |
| Transmission range: | 400-4500nm |
| Electro-optical coefficients: | r33= 30.4pm/V |
| Refractive index at 632.8nm: | no=2.176,ne=2.180 |
Typical Specifications:
| Specifications | Boule | Wafer | ||
| Diameter | Φ3" | Φ4" | Φ3" | Φ4" |
| Length or Thickness | ≤100 | ≤50 | ≤0.35-0.5 | |
| Orientation | 127.86°Y, 64°Y, 135°Y,X,Y,Z, and other cut |
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| Ref.Flat Orientation | X,Y |
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| Ref.Flat Length | 22±2mm | 32±2mm | 22±2mm | 32±2mm |
| Front Side Polishing | Mirror polished 5-15Â | |||
| Back Side Lapping | 0.3-1.0µm | |||
| Flatness(µm) | ≤15 | |||
| Bow(µm) | ≤25 | |||
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- LiTaO3 結晶
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