Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties, Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier



Nd Dopant Concentration
High 1.1±0.1at%
Middle 0.9±0.1at%
Low 0.7±0.1at%
Crystallographic Orientation
  [111]within 5 o
Wavefront Distortion
Extinction Ration
  Φ3 -Φ6.35mm: ≥28dB
  Φ7-Φ10mm: ≥25dB
  Φ 11- Φ 13mm: ≥22dB
  Φ 14- Φ 15mm: ≥18dB
Dimensional Tolerances
Diameter ± 0.05mm
Length ± 0.5mm
End Surface Finish
Flatness/Sphericity ≤0.1 wave
Scratch-Dig 10-5 (per MIL-O-13830A)
End Configuration
Parallelism ≤ 10"
Perpendicularity ≤ 5′
Depth: 0.05±0.03 inch
Angle: 45±5 o
Anti-reflection, R ≤ 0.25%, or other kinds of coatings upon requirement
 Nd:YAG Material Properties 
Formula Nd: Y3AL5O12
Crystal Structure Cubic
Moh Hardness 8.5
Melting Point 1970 oC
Density 4.55 g/cm3 
Atomic Density 1.38 x 1020 atoms/cm3
Thermal Conductivity 0.14Wcm-1K-1
Thermal Expansion 6.9 x 10-6/ o C-1 (111)
Stimulated Emission Cross Section 2.8x10-19 cm2
dn/dT 7.3 x 10-6 o C-1
Young's Modulus 3.17x104 kg/mm­­­-2
Poisson Ratio 0.25
Lasing Wavelength 1064nm
Index of Refraction 1.8197 at 1.0 mm
Fluorescent Lifetime 230 ms
Pumping Wavelength 807.5 nm
Thermal Shock Resistance 790 Wm-1


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