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  • Er:YAG Crystals
  • Er:YAG Crystals

Er:YAG Crystals

  • High efficiency 
  • High damage threshold
  • Eye-safe laser wavelength 2.94nm
  • Excellent for cosmetic and medical lasers
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Dopant Concentration Er: ~50 at% Wavefront Distortion ≤0.125λ/inch(@1064nm)
Extinction Ratio ≥25 dB Rod Sizes Diameter:3~6mm, Length:50~120 mm
Upon request of customer
Dimensional Tolerances Diameter:+0.000"/-0.002"Length: ± 0.02" Barrel Finish Fine Ground
Parallelism ≤10" Perpendicularity ≤5′
Flatness λ/10 Surface Quality 10/5(MIL-PRF-13830B)
AR Coating Reflectivity ≤ 0.25% (@2940nm)


Basic Properties:

Physical and Optical Properties:

Laser Transition 4I11/2to4I13/2 Laser Wavelength 2940nm
Photon Energy 6.75×10-20J(@2940nm) Emission Cross Section 3×10-20cm2
Index of Refraction 1.79 @2940nm Pump Bands 600~800 nm

Erbium-doped yttrium aluminum garnet or Er:YAG crystals is an excellent laser crystal which lasers at 2.94 μm, This wavelength is the most readily absorbed into water and hydroxylapatite of all existing wavelengths and is considered a highly surface cutting laser. The 2.94μm is a eye-safe wavelength, which makes Er:YAG crystals widely be used in medical applications as dental (hard tissues), orthopedics, etc.