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 3 m |
|---|---|
| Cell Parameters | a=5.154 Å, c=13.781 Å |
| Melting point | 1650 ℃ |
| Curie Temperature | 607 ℃ |
| Mohs hardness | 5.5 |
| Density | 7.46 g/cm3 |
| Dielectric Constant | ε11/ε0: 51.7 ε33/ε0 :44.5 |
| 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 - 4500 nm |
| Electro-optical coefficients | r33= 30.4pm/V |
| Refractive index at 632.8nm | no=2.176,ne=2.180 |
Typical Specifications
| Type Specifications | Boule | Boule | Wafer | Wafer |
|---|---|---|---|---|
| Diameter | Φ3 " | Φ4 " | Φ3 " | Φ4 " |
| Length or Thickness | ≤ 100 | ≤ 50 | ≤ 0.35 - 0.5 | ≤ 0.35 - 0.5 |
| Orientation | ※ | ※ | ※ | ※ |
| Ref.Flat Orientation | X,Y | X,Y | X,Y | X,Y |
| Ref.Flat Length | 22 ± 2 mm | 32 ± 2 mm | 22 ± 2 mm | 32 ± 2 mm |
| Front Side Polishing | Mirror polished 5-15Å | Mirror polished 5-15Å | ||
| Back Side Lapping | 0.3-1.0μm | 0.3-1.0μm | ||
| Flatness(µm) | ≤15 | ≤15 | ||
| Bow(µm) | ≤25 | ≤25 |
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※127.86° Y, 64° Y, 135° Y, X, Y, Z, and other cut
技術資料
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