LiTaO3 crystal is also widely used E-O crystal, due to its optical, NLO and E-O poperties similar to those of LiNbO3 crystal, but with higher damage threshold (> 500 MW/cm2 for ns pulsed). Main properties include:
- Transparent Range: 0.4 - 5.0 μm; E-O Coefficient: r33=30.4;
- Refractive Indices: no=2.176, ne=2.180 @ 633 nm.
Maximum LiTaO3 SAW wafer size we can offer is 6 inch in diameter.
Red Optronics provide LiTaO3 in as-cut boules, wafers or slices. Our production capabilities include:
Boules:
- Diameter: f40mm ~ 102mm
- Length: 50mm ~ 150mm
- Orientation: X, Z, 36°Y, 42°Y, 128°Y
- Polish: 0.016mm
Wafers:
- Diameter: f40mm ~ 102mm
- Length: 0.2~1.2mm
- Orientation: X, Z, 36°Y, 42°Y, 128°Ys
- Flatness:
<10mm for f40 ~ 65mm
<15mm for f65 ~ 102mm
- Bow:
<20mm for f40~ 65 mm,
<40mm for f65 ~102mm
Slices:
Size: 100x45x1.5mm ~ 120x40x2mm
| Boule Specifications |
|
|
| Typical Diameter |
φ3"±2mm |
φ4"±2mm |
| Typical Length |
≤120mm |
≤100mm |
| Typical Orientation |
36°Y,42°Y, |
|
| Wafer Specifications |
|
| Diameter |
φ3"±2mm,φ4"±2mm |
| Thickness |
0.3~1mm |
| Orientation |
36°Y,42°Y |
| Reference Flat Orientation |
X |
| Ref.Flat Width |
22±2 |
| Front Side Polishing |
0.25~0.016μm |
| Back Side Lapping |
10~15μm |
| Flatness (μm) |
≤20 |
| Bow (μm) |
≤30 |
|
Notes:
To inquire or order LiTaO3 crystals, please provide specifications as detailed in above.
| Physical and Optical Properties |
|
| Crystal Structure: |
Trigonal, space group R3c,Point group 3m |
| Cell Parameters: |
a=5.154A,c=13.781A |
| Melting point: |
1650°C |
| Curie Temperature: |
607°C |
| Mohs hardness: |
5.5 |
| Density: |
7.46 g/cm3 |
| Dielectric Constant: |
ξ11/ξ0 51.7
ξ33/ξ0 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: |
400-4500nm |
| Electro-optical coefficients: |
r33 30.4pm/V |
| Refractive index at 632.8nm: |
no=2.176, ne=2.180 Aperture |
|
| SAW Properties |
| Cut Type |
νs(m/s) |
κ2s(%) |
TCV(10-6/°C) |
TCD(10-6/°C) |
| X-112°Y |
3295 |
0.75 |
-16.50 |
22.3 |
| Y-Z |
3230 |
0.66 |
|
|
|
Innovation point: Through the crystal growth machine's modification in rotating and lifting system, the stability of crystal growth interface and growth rate become higher. Also the defects caused by the influence of crystal rotating and rising disturbance on the solid-liquid interface during the crystal growth process are reduced. we create simulation of crystal growth system and can design crystal shape. The computer chip control the changing of crystal shape according to crystal growth status, through the processing of precision sensor signals. The ultra low gradient interface growth temperature field we self-designed make the quality of optical crystals much better.
Optical grade lithium tantalate crystals and wafers
Lithium tantalate optical film
Various lithium tantalate LT shaped blocks
Photos:
SAW Level LT ingot
Optical LT wafers
Packing
Audited Supplier 
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