Crystals Materials
Ho:YAG Crystals application for laser remote sensing, medical surgery, and pumping Mid-IR OPO's.
ho-yag-laser-crystal
  • Size: Upon customer request
  • Nd Concentration: 0.1- 2.5(+/-0.1)atm%
  • Length: 3 ~ 150mm
  • Surface Quality: 10/5 Scratch/Dig MIL-O-1380A
  • Parallelism: < 10″
  • Perpendicularity: < 5'
  • Clear Aperture: > 90%
  • Surface Flatness: < λ/10 @ 632.8 nm
  • Coating: AR/HR/PR coating upon customer's request
  • Quality Warranty Period: One year
  • Ho:YAG crystal is excited by a 1.9 μm laser to generate unpolarized laser light with a wavelength of 2.09 μm. For applications such as laser remote sensing, medical surgery, and pumping Mid-IR OPO’s.

    Specifications of Ho:YAG Crystal
    Diameter 3 ~ 20 mm
    Length 5 ~ 180 mm
    Orientation [111] < ± 0.5°
    Thickness/Diameter Tolerance ±0.05 mm
    Surface Quality 10/5 S/D
    Parallelism < 10″
    Perpendicularity < 5'
    Clear Aperture > 90%
    Wavefront Distortion λ/8 @ 632.8 nm
    Surface Flatness < λ/10 @ 632.8 nm
    Chamfer < 0.1 mm @ 45°
    Coating upon customer's request
    Physical and chemical properties
    Chemical Formula Ho3+:Y3Al5O12
    Crystal Structure Cubic
    Lattice Constant 12.01 Å
    Density 4.56 g/cm³
    Melting Point 1970°C
    Thermal Conductivity 14 W/m/K @ 20°C
    10.5 W/m/K @ 100°C
    Thermal Optical Coefficient (dn/dT) 7.3×10-6/K
    Thermal Shock Resistance 790 W/m
    Thermal Expansion 7.8 × 10-6/K @ 25°C
    Hardness (Mohs) 8.5
    Young’s Modulus 317 GPa
    Shear Modulus 310 GPa
    Extinction Ratio 28 dB
    Poisson Ratio 0.3
    Optical properties
    Laser Transition 5I7→5I8
    Laser Wavelength 2.05 μm
    Absorption Cross Section 1.09×10-20 cm2
    Emission Cross Section 1.14×10-20 cm2
    Pump Wavelength 1908 nm
    Laser Wavelength 2090 nm
    Fluorescence Lifetime 7 ms
    Quantum Efficiency 1
    Refractive Index @1.030 μm 1.82
    Upper Conversion Loss Factor 1.8, 2.6, 5.3×10-18 cm3/s

    Stock specification list

    If need other specifications and quantities products, please contact us(sales@aogcrystal.com).
    Part Number Face size Length Doping, atm.% Coating
    Ho-YAG-001 Φ5.0 mm 2.5 mm 1.0 AR/AR@1980 nm + 2090 nm
    Ho-YAG-0801 Φ5.0 mm 6.0 mm 1.0 AR/AR@1980 nm + 2090 nm

    Notes

  • Anti-reflection coatings are available at your specified wavelength.
  • Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
  • To inquiry or order a finished Ho:YAG laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Ho-dopant concentration, sizes, and coating. For special request, please specify specification in details for evaluation and fabrication.
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