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Undoped and doped Barium Titanate crystals are the excellent photorefractive materials, their high SPPC (Self pumped Phase Conjugation) reflection and two wave mixing (optical amplification) efficiency, which make them important role for information processing and image storage. In adition, BaTiO3 is an important substrate material for some special film due to its unique ferroelectric and other properties. |
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| Transmission wavelength |
0.43 - 6.30μm |
| Index of Refraction |
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515 nm |
633 nm |
800 nm |
| no |
2.4912 |
2.4160 |
2.3681 |
| ne |
2.4247 |
2.3630 |
2.3235 |
| Electro Optic Coefficients |
rT13=8+/-2 pm/V |
| rT33=105-/+10 pm/V |
| rT42= 1300+/-100 pm/V |
| Reflectivity of SPPC ( 0o cut) |
50-70 % (Ce: BaTiO3) for λ = 515 nm |
| 40-60% (Pure BaTiO3) for λ = 515 nm |
| 50-80 % (Ce: BaTiO3) for λ = 633 nm |
| 40-60% (Pure BaTiO3) for λ= 633 nm |
| Two-wave mixing coupling constant |
10-40cm-1 |
| Absorption loss |
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515 nm |
633 nm |
800 nm |
| a |
0.285cm-1 |
0.108cm-1 |
0.033cm-1 |
| Wavelength range for photo refractive effect |
| Undoped BTO :for visible |
| Ce:BTO:480-780nm |
| Rh:BTO:720-1060nm |
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Specifications |
Standard Size |
10x10，10x5，10x3,5x5 mm |
Thickness |
0.5mm，1.0mm |
Polishing |
one or two side polished |
Bulk |
5x5x5,4x4x4,3x3x3 mm, 0°or 45°cut,2-6 faces polished |
Orientation |
＜100＞,? ＜110＞,? ＜001＞, ＜111＞ |
Angle tolerance |
better than ±0.5° |
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1.The tetragonal BaTiO3 single crystal (the useful phase for both photorefractive effect and substrate) changes the phase when its temperature is lower than 13℃ or higher 125℃, so it has to be keept its temperature in the safe range during its using, storage and transportation. |
2. The extra force causes a phase transition. Handle care is considered.
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3. Poling is needed for (001)orientation substrate |
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