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LilO3 Crystal

POC-OC-122413-LilO3 Crystal

  • Wide transparency range from 300 nm to 5000 nm.
  • High nonlinear optical coefficient (d15 = -5.5 × 10^-12 m/V).
  • Negative uniaxial refractive indices for improved optical performance.
  • Suitable for frequency-doubling, tripling, and mixing applications.
  • Available in polished or as-cut formats with AR-coated options.

Customizable Components Available for This Material to Meet Your Specific Needs!

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Material General Description of  LilO3 Crystal

Lithium Iodate (LiIO3) is one of the oldest commercial nonlinear optical (NLO) crystals, widely recognized for its high nonlinear coefficient and broad transparency range. It is used extensively in frequency-doubling, tripling, and laser mixing applications, particularly for low and medium power laser systems. Its hexagonal structure and excellent optical homogeneity make it ideal for critical laser components. However, LiIO3 is highly hygroscopic and requires dry storage and sealed housing for extended durability. Photonics On Crystals (POC) ensures high-quality fabrication to meet industry standards for precision optics.

 

General Applications and Examples of  LilO3 Crystal

  1. Frequency-Doubling and Tripling
    LiIO3 crystals are extensively used in frequency-doubling and tripling processes for lasers operating in the UV and visible ranges. This capability is especially valuable in laser spectroscopy and bioimaging applications.
    Example: Conversion of a 532 nm laser to 266 nm for biomedical imaging.
  2. Laser Mixing Applications
    The high nonlinear coefficient makes LiIO3 a preferred choice for laser mixing in low to medium power setups, enabling a variety of wavelength combinations for research and industrial applications.
    Example: Generating 355 nm output from 1064 nm and 532 nm lasers.

Optical Parametric Oscillators (OPOs)
LiIO3 is also used in OPO systems due to its wide transparency range and excellent phase-matching properties.
Example: Generating tunable wavelengths for spectroscopy and telecommunications

Chemical and Structural Properties

Property

Value

Crystal Structure

Hexagonal, Point Group 6

Transparency Range

300–5000 nm

Nonlinear Coefficient (d15)

-5.5 × 10^-12 m/V

Refractive Indices

nₒ = 1.8571, nₑ = 1.7165 (at 1064 nm)

Optical and Nonlinear Optical Properties

Property

Value

Transparency Range (nm)

300–5000

Refractive Indices (1064 nm)

nₒ = 1.8571, nₑ = 1.7165

Nonlinear Coefficient (d15)

-5.5 × 10^-12 m/V

Sellmeier Equation (nₒ)

n² = 3.415716 + 0.047031 / (λ² – 0.035306) – 0.008801

Sellmeier Equation (nₑ)

n² = 2.918692 + 0.035145 / (λ² – 0.028224) – 0.003641

Standard Fabrication Specifications

Specification

Value

Dimension Tolerance (mm)

W ± 0.2 × H ± 0.2 × L + 0.5 / -0.2

Clear Aperture

Central 90% of the diameter

Surface Quality (Scratch/Dig)

20/10 to MIL-PRF-13830B

Flatness

λ/4 @ 633 nm

Transmitted Wavefront Distortion

λ/4 @ 633 nm

Parallelism

< 30 arc sec

Perpendicularity

≤ 15 arc min

Angle Tolerance (°)

Δθ ≤ 0.5

Quality Warranty Period

One year under proper use

Spectrum Transmission Curve:

Spectrum transmission curves for LiIO3 crystals can be provided upon request, showcasing their excellent UV and visible light transmission characteristics.

Coating Specification:

  • AR Coatings: Anti-reflective coatings available for specific wavelengths upon request.
  • Customization: Custom coatings (e.g., BBAR, HR) are available for diverse applications.
  • 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.

 

POC Strength and Capabilities

Photonics On Crystals (POC) specializes in the high-precision fabrication of LiIO3 crystals. Our capabilities include:

  • Customization: Dimensions, coatings, and finish can be tailored to specific requirements.
  • High Quality Assurance: Each crystal undergoes stringent quality checks to ensure performance and durability.
  • Technical Support: Our team provides comprehensive support for application-specific needs.

Standard Products

Product Code

Dimensions (mm)

Coating

Application

POC-LiIO3-532-10

10 × 10 × 10

AR @ 532 nm

Frequency Doubling

POC-LiIO3-266-12

12 × 12 × 12

AR @ 266 nm

Tripling

POC-LiIO3-Custom

Customizable

On Request

All Applications

POC-OC-122413-LilO3 Crystal

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