Yb:YAG Crystals


  • Chemical: Yb:YAG
  • Output Wavelength: 1.029 um
  • Absorption Bands: 930 nm to 945 nm
  • Pump Wavelength: 940 nm
  • Melting Point: 1970°C
  • Density: 4.56 g/cm3
  • Mohs Hardness: 8.5
  • Thermal Conductivity: 14 W.s /m /K @ 20°C
  • Product Detail

    Specification

    Video

    Yb:YAG is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped systems. Compared with the commonly used Nd:YAG crsytal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-laser level lifetime, three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replace Nd:YAG crystal for high power diode-pumped lasers and other potential applications. 
    Yb:YAG shows great promise as a high power laser material. Several applications are being developed in the field of industrial lasers, such as metal cutting and welding. With high quality Yb:YAG now available, additional fields and applications are being explored.
    Advantages of Yb:YAG Crystal:
    • Very low fractional heating, less than 11%
    • Very high slope efficiency
    • Broad absorption bands, about 8nm@940nm
    • No excited-state absorption or up-conversion
    • Conveniently pumped by reliable InGaAs diodes at 940nm(or 970nm)
    • High thermal conductivity and large mechanical strength
    • High optical quality 
    Applications:
    • With a wide pump band and excellent emission cross-section Yb:YAG is an ideal crystal for diode pumping.
    • High Output Power 1.029 1mm
    • Laser Material for Diode Pumping
    • Materials Processing, Welding and Cutting

    Basic Properties:

    Chemical Formula Y3Al5O12:Yb (0.1% to 15% Yb)
    Crystal Structure Cubic
    Output Wavelength 1.029 um
    Laser Action 3 Level Laser
    Emission Lifetime 951 us
    Refractive Index 1.8 @ 632 nm
    Absorption Bands 930 nm to 945 nm
    Pump Wavelength 940 nm
    Absorption band about pump wavelength 10 nm
    Melting Point 1970°C
    Density 4.56 g/cm3
    Mohs Hardness 8.5
    Lattice Constants 12.01Ä
    Thermal Expansion Coefficient 7.8×10-6 /K , [111], 0-250°C
    Thermal Conductivity 7.8×10-6 /K , [111], 0-250°C

    Technical Parameters:

    Orientation within 5°
    Diameter 3 mm to 10mm
    Diameter Tolerance +0.0 mm/- 0.05 mm
    Length  30 mm to 150 mm
    Length Tolerance ± 0.75 mm
    Perpendicularity  5 arc-minutes
    Parallelism 10 arc-seconds
    Flatness 0.1 wave maximum
    Surface Finish 20-10
    Barrel Finish  400 grit
     End Face Bevel: 0.075 mm to 0.12 mm at 45° angle
    Chips No chips allowed on end face of rod; chip having maximum length of 0.3 mm permitted to lie in the area of bevel and barrel surfaces.
    Clear aperture Central 95%
    Coatings Standard coating is AR at 1.029 um with R<0.25% each face. Other coatings available.