α-BBO
α-BBO (barium metaborate) crystal is an excellent birefringent material with good transmission from ultraviolet to mid-infrared, good internal quality and low absorption. Because of its excellent ultraviolet transmission, it is widely used in high-extinction-ratio and deep-ultraviolet laser systems, mainly processed into polarizing devices such as Glan prisms. Advantages include high ultraviolet transmittance, large birefringence, low volume absorption, high damage threshold and stable physical and mechanical properties.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Crystal Structure | Trigonal |
| Transmission Range | 190-3500 nm |
| Hygroscopicity | Low |
| Mohs Hardness | 4.5 Mohs |
| Coefficient of Thermal Expansion | -9.3×10-6 /℃（C） -9.5×10-6 /℃（A） |
| Refractive Index | no=1.6776，ne=1.5534，@ 532 nm no=1.6579，ne=1.5379，@ 1064 nm |
| Sellmeier Equation (Pure YVO4, λ in μm) | no2 = 2.7471 + 0.01878 / (λ2 - 0.01822) - 0.01354 λ2 ne2 = 2.37153 + 0.01224 / (λ2 - 0.01667) - 0.01516 λ2 |
| Optical Axis Orientation Accuracy | 6′ |
| Parallelism | 20″ |
| Flatness | λ/4 @ 633 nm |
| Bracket | Per customer requirements |
Applications
Datasheet
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Supplier Information
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