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ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd. |
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LiTaO3 Lithium Tantalate Crystal
LiTaO3 is an E-O crystal widesly used for E-O devices, due to its good optical NLO and E-O properties, as well as high damage threshold. Crystro supplies hign quality LiTaO3 boules and wafers with the following specifications for standard applications. We can also offer other specification upon request:
Basic Properties of LiTaO3
| Crystal Sturucture | Trigonal, Space group R3c, Point group 3m |
| Cell Parameters | a=5.154 Å, c=13.781 Å |
| Melting Point | 1650℃ |
| Curie Temperature | 607℃ |
| Mohs Hardness | 5.5 |
| Density | 7.46g/cm3 |
| Dielectric Constants | ε11/ε0:51.7 ε33/ε0:44.5 |
| Elastic Stiffness Coefficients | CE11:2.33 (x 1011 N/m2) CE33:2.77 (x 1011 N/m2) |
| Piezoelectric Strain Constants | d22:2.4 (x 10-11 C/N) d33:0.8 (x 10-11 C/N) |
| Transmission Range | 400-4500nm |
| Electro-optical Coefficients | r33=30.4 pm/V |
| Refractive Index at 632.8nm | n0=2.176, ne=2.180 |
Typical Specifications:
| Specifications | Boule | Wafer | ||
| Diameter | Φ3'' | Φ3'' | Φ4'' | |
| Length or Thickness (mm) | ≤100mm | nm | 0.35-0.5mm | |
| Orientation | 127.86°Y,64°Y,135°Y,X,Y,Z, and other cut | |||
| Ref.Flat Orientation | X,Y | |||
| Ref.Flat Length | 22±2mm | 2mm | 22±2mm | 32±2mm |
| Front Side polishing | Mirror polished 5-15 Å | |||
| Back Side Lapping | 0.3-1.0μm | |||
| Flatness (μm) | ≤15 | |||
| Bow (μm) | ≤25 | |||
