Lithium Triborate (LBO) Crystal Properties – Shape Optics

Key Features:

  • Broad transparency range (160 – 2600 nm)
  • High optical homogeneity (δn ~ 10⁻⁶/cm)
  • High damage threshold
  • Efficient frequency conversion
  • Non-critical phase matching (NCPM)
LiB3O5- LBO Crystal

Description:

Lithium Triborate (LBO, LiB3O5) crystals are highly efficient nonlinear optical materials known for their excellent properties and versatility. LBO crystals are widely used in laser systems for second harmonic generation (SHG), third harmonic generation (THG), optical parametric oscillation (OPO), and other applications. The broad transparency range, high damage threshold, and efficient frequency conversion make LBO crystals suitable for various high-power laser applications.

The most common applications include frequency doubling of high-power 1064 nm lasers to generate 532 nm green light or tripling 1064 nm lasers to produce 355 nm UV light. The unique properties of LBO crystals, such as their high optical homogeneity and non-critical phase matching (NCPM), ensure stable and efficient performance in demanding environments.

Physical Properties:

PropertyValue
Crystal StructureOrthorhombic
Unit Cell Dimensionsa = 8.447Å, b = 5.139Å, c = 10.054Å
Melting Point917°C
Mohs Hardness6
Density2.47 g/cm³
Transparency Range160 – 2600 nm

Optical Properties:

PropertyValue
Refractive Indices (at 1064 nm)nx = 1.551, ny = 1.605, nz = 1.546
Effective Nonlinear Coefficientsd31 = 0.85 pm/V, d32 = 1.05 pm/V, d33 = 0.51 pm/V
Angular AcceptanceΔθ = 2.8 mrad·cm
Temperature AcceptanceΔT = 1.5°C·cm
Walk-off Angle< 2 mrad
Damage Threshold> 10 GW/cm² @ 1064 nm, TEM00, 10 ns, 10 Hz

Standard Specifications:

SpecificationValue
Surface Quality10 – 5 Scratch-Dig (MIL-PRF-13830B)
Flatnessλ/8 @ 633 nm
Parallelism< 20 arcsec
Perpendicularity< 5 arcmin
Angle Tolerance< 30 arcmin
Aperture Tolerance± 0.1 mm
Clear Aperture> 90% of full aperture

Applications:

  • Second Harmonic Generation (SHG): Frequency doubling of high-power lasers to generate green light.
  • Third Harmonic Generation (THG): Frequency tripling of high-power lasers to produce UV light.
  • Optical Parametric Oscillation (OPO): Generation of tunable laser sources.
  • Sum Frequency Generation (SFG) and Difference Frequency Generation (DFG): Used in various spectroscopic applications.

Processing and Handling:

LBO crystals require careful handling to avoid surface contamination and mechanical damage. It is recommended to clean the crystals with appropriate solvents and non-abrasive materials regularly. Temperature control during operation is crucial to maintain optimal performance. Custom sizes and coatings are available upon request to meet specific application requirements.

Why Choose Shape Optics:

Shape Optics offers LBO crystals with unparalleled quality and performance. Our extensive experience in nonlinear optics and advanced manufacturing techniques ensure that our products meet the highest standards. We provide comprehensive technical support and customization options to enhance your optical systems.

Shape Optics Strength and Capabilities:

  • Advanced Manufacturing: State-of-the-art technology for precise crystal growth and processing.
  • Customization: Tailored solutions to meet unique customer specifications.
  • Global Distribution: Reliable delivery and support worldwide.
  • Expert Team: Dedicated professionals with extensive experience in nonlinear optics.
  • Quality Assurance: Rigorous testing and quality control to ensure product reliability and performance.

Shape Optics is your trusted partner for high-quality LBO crystals. Our commitment to excellence guarantees superior products and exceptional service for all your optical needs. Choose Shape Optics for unparalleled performance and innovation in optical materials.