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Er:Yb:YAB Crystal

POC-OC-122438-Er:Yb:YAB Crystal

  • High thermal conductivity and excellent transparency.
  • Strong absorption and emission cross-sections for optimal laser performance.
  • High Yb³⁺ to Er³⁺ energy transfer efficiency, minimizing losses.
  • Wide absorption bandwidth near 976 nm for versatile laser pumping.
  • Highly durable uniaxial crystal with robust structural integrity.

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

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Er:Yb:YAB Crystal Material General Description

Er³⁺/Yb³⁺ co-doped Yttrium Aluminum Borate (Er:Yb:YAB Crystal) crystals are designed for eye-safe laser applications, particularly at 1.55 µm. They offer superior thermal conductivity, high quantum efficiency, and minimal upconversion loss, outperforming alternative materials like phosphate glasses. With excellent transparency to environmental factors such as smoke and atmospheric absorption, Er:Yb:YAB crystals are well-suited for precise applications like LiDAR, 3D imaging, and target recognition. The robust structural integrity and high laser efficiency make it a preferred choice for both continuous wave (CW) and pulsed laser operations.

 

Er:Yb:YAB Crystal General Application and Examples

  • LiDAR Systems: Utilized in remote sensing and 3D imaging due to its eye-safe wavelength and efficient laser output.
  • Telecommunications: Er:Yb:YAB Crystal Offers stable and efficient operation in telecom lasers at 1.55 µm.
  • Medical Applications: Suitable for diagnostics and surgical lasers due to its precision and high absorption capabilities.
  • Military and Aerospace: Applied in targeting systems, rangefinders, and laser designators due to excellent penetration and robustness.
  • Scientific Research: Preferred for high-precision spectroscopy and quantum applications requiring ultra-low noise.

Chemical and Structural Properties

Property

Specification

Chemical Formula

Er:Yb:YAl(BO₃)₄

Crystal Structure

Trigonal, D₃₂-R32

Atomic Density

0.55 × 10²⁰ atoms/cm³ (at.% Yb³⁺ or Er³⁺)

Mohs Hardness

7.5 Mohs

Density

3.7 g/cm³

Refractive Index

1.75 (nᴇ), 1.68 (nᴏ) at 1550 nm

Thermal Expansion

10^-6/K, anisotropic: 2.0 (a-axis), 9.7 (c-axis)

Thermal Conductivity

4.7 W/m/K

Optical, Laser and Nonlinear Optical Properties

Parameter

Er:Yb:YAB

Comparison (Phosphate Glass)

Pumping Wavelength

976 nm

976 nm

Peak Absorption Cross-section

3 × 10^-20 cm² (σ-polarization)

1 × 10^-20 cm²

FWHM of Absorption Band

19 nm

10 nm

Peak Fluorescence Wavelength

1530 nm

1533 nm

Emission Cross-section

2 × 10^-20 cm²

0.8 × 10^-20 cm²

Fluorescence Lifetime

0.3 ms

0.8 ms

Refraction Index

1.75 (nᴇ), 1.68 (nᴏ)

1.54

Maximum Slope Efficiency

>30%

>30%

Standard Fabrication Specifications

Specification

Value

Dopant Concentration

Er³⁺: 0.1–3 at.%, Yb³⁺: 5–30 at.%

Dimension Tolerance

±0.1 mm

Surface Quality

10/5 to MIL-PRF-13830B

Wavefront Distortion

<λ/8 at 633 nm

Parallelism

<20 arc sec

Perpendicularity

<15 arc min

Flatness

<λ/8 at 633 nm

Chamfer

<0.2 mm × 45°

Spectrum Transmission Curve:

Spectrum transmission curves highlight high absorption near 976 nm and strong emission at 1530 nm with minimal overlap, enabling efficient laser operation and high selectivity. Data consolidated indicates high pump efficiency.

Coating Specification:

 

  • AR Coating: Anti-reflection coating for 976 nm and 1480–1600 nm, with reflectivity R < 0.25%.
  • Custom Coatings: Available for additional wavelengths upon request.
  • 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) leverages cutting-edge manufacturing techniques to produce premium-grade Er:Yb:YAB crystals. Our rigorous quality control ensures high consistency and customization capabilities, with flexible design options tailored to meet the demands of scientific, industrial, and military applications.

Standard Products

Dimensions

Length

End Faces

Doping

Coating

Price (USD)

3 × 3 mm

1 mm

Brewster-angle cut

12% Yb³⁺, 1.5% Er³⁺

AR @ 976 nm + 1480–1600 nm

$540

3 × 3 mm

2 mm

Right-angle cut

12% Yb³⁺, 1.5% Er³⁺

Uncoated

$540

3 × 3 mm

3 mm

Right-angle cut

12% Yb³⁺, 1.5% Er³⁺

AR @ 976 nm + 1480–1600 nm

$590

Customization

As required

As required

As required

As required

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POC-OC-122438-Er Yb YAB Crystal

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