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α-BBO
Optical Crystals

α-BBO

Supplier
Enlumen
Category
Optical Crystals
Origin
China

High temperature phase of BaB2O4 is an excellent birefringent crystal; it is characterized by large birefringent coefficient and wide transmission window from 189nm to 3500nm, particularly it is suitable to make the high power UV polarizer, due to its unique UV transparency and good mechanical properties. The physical, chemical, thermal and optical properties of β-BBO crystals are similar to those of α-BBO, for instant high optical homogeneity (better than 1x10-6/cm), extremely low absorption in the UV to IR range (<0.5% from 300-2300nm), low hygroscopic susceptibility, high damage threshold. However, the nonlinear optical propertie of α-BBO is vanished due to the centric symmetry with its crystal structure. a-BBO is an excellent crystal to replace Calcite, TiO2, and LiNbO3, etc. in Glan-Taylor and Glan-Thompson polarizers as well as walk-off beam splitters, especially for high power and UV polarizer, due to its unique UV transparency, good mechanical properties and high damage threshold.

Specification Snapshot
Dimensions
up to ϕ50 mm
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Overview

High temperature phase of BaB2O4 is an excellent birefringent crystal; it is characterized by large birefringent coefficient and wide transmission window from 189nm to 3500nm, particularly it is suitable to make the high power UV polarizer, due to its unique UV transparency and good mechanical properties. The physical, chemical, thermal and optical properties of β-BBO crystals are similar to those of α-BBO, for instant high optical homogeneity (better than 1x10-6/cm), extremely low absorption in the UV to IR range (<0.5% from 300-2300nm), low hygroscopic susceptibility, high damage threshold. However, the nonlinear optical propertie of α-BBO is vanished due to the centric symmetry with its crystal structure. a-BBO is an excellent crystal to replace Calcite, TiO2, and LiNbO3, etc. in Glan-Taylor and Glan-Thompson polarizers as well as walk-off beam splitters, especially for high power and UV polarizer, due to its unique UV transparency, good mechanical properties and high damage threshold.

Specifications

ParameterValue
Crystal structureTriclinic
Transmission range190-3500 nm
Density3.85 g/cm3
Mohs Hardness4.5 Mohs
Thermal Expansion Coefficient-9.3×10-6 /℃（C）
Thermal Expansion Coefficient [A]-9.5×10-6 /℃（A）
Refractive index [532nm]no=1.6776，ne=1.5534，@ 532 nm
Refractive index [1064nm]no=1.6579，ne=1.5379，@ 1064 nm
Sellmeier equation [λin μm]no2 = 2.7471 + 0.01878 / (λ2 - 0.01822) - 0.01354 λ2
Sellmeier equation [λin μm]ne2 = 2.37153 + 0.01224 / (λ2 - 0.01667) - 0.01516 λ2
Dimensionsup to ϕ50 mm
Lengthup to40 mm
Surface quality [MIL-PRF-13830B]10/5 According MIL-PRF-13830B
Crystal Orientation12′
Parallelism20″
Flatness [633nm]λ/8 @ 633 nm
Clear aperture＞90%
CoatingP coating or AR coating
MountUpon request

Key Features

Large Birefringence High UV transmittance High Damage Threshold Low bulk absorption suitable for high power applications Stable physical and mechanical properties

Datasheet

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Supplier Information

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Enlumen
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Fujian Enlumen Tech Co.,Ltd. is located in Fuzhou, China, and has gathered a core technical team with more than a decade of profound industry accumulation, committed to becoming a global leading one-stop solution provider for precision optical components. Enlumen is an ISO 9001 certificated company. The company owns a 5,000-square-meter workshop and advanced domestic and international testing instruments and coating machines, such as digital laser interferometers, high-precision angle measurement instrument, wave plate retardation detectors, and Japanese Optorun coating machines, which ensure the high quality of products. Focused on the R&D and manufacturing of high-precision, high-performance, and high-quality optical components, we strictly control every process from raw materials to finished products. Our core competitiveness is precision manufacturing capabilities and end-to-end services — whether you need customized optical design, high precision complex components, small-batch trial production or mass production, we can provide efficient and reliable end-to-end services. Relying on advanced manufacturing technologies, our products and services are trusted by global customers in Europe, America, and other regions. We continue to invest in technological innovation and quality management, with core values of excellent quality, quick response, and customer satisfaction, helping customers to make a breakthrough in the fields such as laser technology, biomedical, precision instruments, scientific research equipment, and consumer electronics.

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