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CLBO Crystals

POC-OC-122405- CLBO Crystals

  • Exceptional UV nonlinear optical properties with a cut-off wavelength down to 180 nm.
  • High FOHG and FIHG conversion efficiencies for Nd:YAG lasers.
  • Wide acceptance angles with minimal walk-off, enhancing beam quality.
  • VUV output achievable at 193 nm using precise phase matching.
  • Durable and stable, suitable for high-power applications with no saturation.

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General Description

Cesium Lithium Borate (CsLiB₆O₁₀ or CLBO) is a cutting-edge nonlinear optical crystal, optimized for UV and deep UV applications. It is characterized by its excellent optical clarity, minimal absorption, and superior nonlinear optical efficiency. CLBO exhibits a larger temperature and spectral acceptance than other crystals, making it ideal for high-power laser systems and applications demanding precise harmonic generation. Its low hygroscopicity ensures stability under dry and sealed conditions. The crystal’s rapid growth cycle and scalable dimensions enable cost-effective manufacturing for industrial and research needs.

General Applications and Examples

CLBO crystals are extensively employed in various advanced photonics applications:

  1. High-Order Harmonic Generation:
    • Used for FOHG (Fourth Order Harmonic Generation) and FIHG (Fifth Order Harmonic Generation) in Nd:YAG lasers, enabling applications in microlithography and semiconductor manufacturing.
    • Example: Generating 193 nm deep UV for microprocessing applications.
  2. UV and Deep UV Lasers:
    • Applied in LiDAR systems, biomedical imaging, and UV spectroscopy.
    • Example: UV-LiDAR systems use CLBO for environmental monitoring and mapping.
  3. Microprocessing and Optical Communication:
    • Ideal for high-precision material processing and advanced optical fiber communication technologies.
    • Example: CLBO’s phase matching supports coherent UV light generation, critical for high-speed optical networks.
  4. Biomedical Research:
    • Suitable for UV imaging techniques and fluorescence-based diagnostics.
    • Example: CLBO crystal enables enhanced imaging resolution in molecular biology studies.
  5. Laser-Based Instrumentation:
    • Widely used in scientific setups requiring stable and efficient nonlinear optical conversion.
    • Example: CLBO crystals Facilitates efficient SHG and THG for pump lasers in OPO systems.

Chemical and Structural Properties

PropertySpecification
Crystal StructureTetragonal, Space Group I42m
Lattice Parametersa = 10.49 Å, c = 9.939 Å
SymmetryZ = 4
Melting PointApprox. 844.5 °C
Density3.85 g/cm³
Thermal Expansionαa = 4.8 × 10⁻⁵/K, αc = 2.69 × 10⁻⁵/K

Optical and Nonlinear Optical Properties

PropertySpecification
Transparency Range180–2750 nm
Angle Acceptance1.02 mrad·cm (1064 nm)
Temperature Acceptance9.4 °C·cm
Spectral Acceptance7.03 nm·cm (1064 nm)
Walk-off Angle1.78° (1064 nm)
Effective NLO Coefficientsd₃₃ = 1.16 pm/V (at 488 nm)
NLO Coefficientsd_ijk = d*sin(2θ)*sin²(φ)
Sellmeier Equationsn² = 2.2104 + 0.01018λ² – 0.01258λ⁻²

Standard Fabrication Specification

ParameterSpecification
Dimension ToleranceW ± 0.1 mm x H ± 0.1 mm x L ± 0.2 mm
Flatnessλ/8 @ 633 nm
Surface Quality10-5 to MIL-PRF-13830B
Chamfer0.2 mm ± 45°
Damage Threshold>300 MW/cm² (266 nm, 10 Hz)

Base Material AR-Coating Reflectance
CLBO AR-532/266 nm R < 0.2% @ 532nm
CLBO AR-1064/213 nm R < 2% @ 213nm
  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

 

Dimension (mm)CoatingApplicationPrice (USD)Customization
5 × 5 × 0.5AR-532/266 nmFOHG/FIHG$420Available
10 × 10 × 1.0AR-1064/213 nmSHG/THG$580Available

POC-OC-122405-CLBO Crystal

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