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Nd:YAG Crystals

Spectroscopic and thermo-mechanical properties

Absorption peak wavelength 808 nm
Absorption cross-section at peak 6.7×10-20 cm2
Absorption bandwidth at peak wavelength 2.5 nm
Laser wavelength 1064 nm
Lifetime of 4F3/2 neodymium energy level 250 μs
Emission cross-section 3×10-19 cm2
Refractive index @1064 nm 1.82
Crystal structure cubic
Density 4.56 g/cm3
Mohs hardness 8.5
Thermal conductivity ~13 Wm-1K-1
dn/dT 9.86×10-6K-1
Thermal expansion coefficient 6.96×10-6K-1
Typical doping level 0.5-1.2at. %

Standard specifications

Orientation [111]
Extinction ratio >28 dB
Clear aperture >90%
Face dimensions tolerance +0/-0.1 mm
Length tolerance ±0.1 mm
Parallelism error 20 arcsec
Perpendicularity error <10 arcmin
Protective chamfers <0.1 mm at 45˚
Surface quality 10-5 S-D
Surface flatness <λ/8@632.8 nm
Wavefront distortion λ/4@632.8 nm
Coatings AR(R<0,15%)@1064 nm on both sides or
HT(T>95%)@808 nm + HR(R>99,5%)@1064 nm/
AR(R<0,15%)@1064 nm
Laser induced damage threshold >10 J/cm2@1064 nm, 10 ps
Mount Unmounted