Name: OP6814 α-phase Barium Borate Crystal (α-BBO)
Brand: Stanford Advanced Materials (SAM)
SKU: OP6814
Availability: InStock

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OP6814 α-phase Barium Borate Crystal (α-BBO)

Catalogue Number	OP6814
Material	α-BaB2O4, α-BBO
Density	3.85 g/cm3
Dimensions	Customized

The α-phase Barium Borate (α-BBO) crystal exhibits a high birefringence and excellent UV transparency, making it suitable for polarisation optics and high-performance laser applications. Stanford Advanced Materials (SAM) is a reliable global supplier of high-performance materials, providing high-quality optical crystals and advanced ceramics for state-of-the-art industrial and research applications.

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Description

Specification

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α-phase Barium Borate Crystal (α-BBO) Description

α-BBO Crystal (Alpha-Barium Borate, α-BaB₂O₄) is a negative uniaxial crystal known for its broad transmission range from 190 to 3500 nm and high birefringence. It performs exceptionally well in ultraviolet and high-power optical applications. While α-BBO shares similar physical, chemical, optical, and thermal properties with β-BBO, it differs in its centrosymmetric crystal structure, which means it lacks nonlinear optical properties. This makes α-BBO ideal for use in polarization optics, waveplates, and other applications where high transparency and stability are required without nonlinear effects.

α-phase Barium Borate Crystal (α-BBO) Applications

· UV and deep-UV optical systems

· High-power laser optics

· Polarization optics (e.g., polarizers, waveplates)

· Electro-optic modulators

· Optical isolators

· Beam displacers

· Ultrafast optics and instrumentation

· Spectroscopy and analytical instruments

α-phase Barium Borate Crystal (α-BBO) Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

packaging wood packaging

Packaging: Carton, Wooden box, Paper barrel, Iron barrel, or Customized.

Kindly review the packaging details provided for your reference.

α-phase Barium Borate Crystal (α-BBO) FAQs

Q1: What is α-BBO crystal?
A1: α-BBO (alpha-phase Barium Borate, α-BaB₂O₄) is a negative uniaxial crystal with high birefringence and excellent UV transmission. Unlike β-BBO, it is not suitable for nonlinear optical applications due to its centrosymmetric crystal structure.

Q2: What are the key optical properties of α-BBO?
A2: α-BBO has a wide transmission range from 190 to 3500 nm, high birefringence, low hygroscopicity, and excellent thermal and mechanical stability.

Q3: What is the difference between α-BBO and β-BBO crystals?
A3: While both share similar physical and thermal properties, β-BBO supports nonlinear optical applications, whereas α-BBO does not due to its centrosymmetric structure. α-BBO is primarily used for polarization optics.

Comparison Table

Property	α-BBO Crystal	β-BBO Crystal
Crystal Structure	Centrosymmetric (Trigonal)	Non-centrosymmetric (Trigonal)
Nonlinear Optical Property	Not present	Strong nonlinear optical properties (e.g., SHG, OPO)
Birefringence	High	Moderate
Transparency Range	190 – 3500 nm	190 – 3500 nm
Applications	Polarization optics, waveplates, UV optics, beam displacers	Frequency conversion, SHG, OPO, OPA, ultrafast pulse generation
Hygroscopicity	Low	Low
Damage Threshold	High (suitable for high-power lasers)	High (but slightly lower than α-BBO)
Refractive Index	Higher birefringence (larger Δn between no and ne)	Lower birefringence
Typical Use Environment	Polarization and linear optics	Nonlinear optical systems

Specification

Basic Characteristics

Property	Value
Crystal Structure	Trigonal
Transmission Range	190-3500 nm
Density	3.85 g/cm³
Hygroscopicity	Low
Mohs Hardness	4.5 Mohs
Thermal Expansion Coefficient	-9.3 × 10⁻⁶ /°C (C-axis) -9.5 × 10⁻⁶ /°C (A-axis)
Damage Threshold	1 GW/cm² @ 1064 nm, 10 ns, 10 Hz (AR coating)
Refractive Index	n_o = 1.6776, n_e = 1.5534 @ 532 nm n_o = 1.6579, n_e = 1.5379 @ 1064 nm
Sellmeier Equation (μm)	n_o² = 2.7471 + 0.01878 / (λ² - 0.01822) - 0.01354 λ² n_e² = 2.37153 + 0.01224 / (λ² - 0.01667) - 0.01516 λ²

Product Specifications

Property	Specification
Dimensions	Clear aperture up to φ50 mm Length up to 40 mm
Surface Quality	10/5 (per MIL-PRF-13830B standard)
Optical Axis Orientation Accuracy	6"
Parallelism	20"
Flatness	λ/4 @ 633 nm
Clear Aperture	> 90%
Coating	AR coating or protective coating
Mount	Customizable upon request