高温偏硼酸钡
高温形成的BBO (α -BaB2O4)为负单轴晶体。它们在190nm到3500nm的宽透明范围内具有很大的双折射。α -BBO晶体的物理、化学、热学和光学性质与β -BBO晶体相似。然而，由于α -BBO晶体的中心对称性，其非线性光学性质不存在。
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Basic Properties |
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Transparency Range |
190~3500nm |
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Density |
3.85 g/cm 2 |
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Hygroscopic Susceptibility |
Low |
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Mohs Hardness |
4.5 |
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Thermal Expansion Coefficients（/CO） |
-9.3X10-6 （C ） |
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-9.5X10-6 （A ） |
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Damage Threshold |
1GW |
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Refractive Indices |
No=1.6776，Ne= 1.5534，532nm No=1.6579，Ne=1.5379，1064nm |
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Sellmeier Equation (λ in μm) |
no2 = 2.7471+0.01878/(λ2 -0.01822)-0.01354λ2 ne 2 = 2.37153+0.01224/(λ2 -0.01667)-0.01516λ2 |
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Capabilities |
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Material |
a-BBO Crystal |
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Size |
1mm-40mm |
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Surface Quality |
10-5 |
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Optical Axis Orientation |
6 arc min |
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Parallelism |
<10 ace sec |
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Flatness |
λ/4@633nm |
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Clear Aperture |
>90% |
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Coating |
AR coating |
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Mount |
Upon Customer's Specification |
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