Nd:YLF Crystals

Spectroscopic and thermo-mechanical properties

Absorption peak wavelength 792 nm
Absorption coefficient at peak 10 cm-1
Absorption bandwidth at peak wavelength ~5 nm
Laser wavelength 1047, 1053 nm
Lifetime of 4F3/2 neodymium energy level 485 μs
Emission cross-section 15×10-20 (E||C) cm2@1047 nm
10×10-20 (E⊥C) cm2@1053 nm
Refractive index @1064 nm no=1.448 ne=1.470
Crystal structure tetragonal
Density 3.95 g/cm3
Mohs hardness 5
Thermal conductivity 6 Wm-1K-1
dn/dT -4.6×10-6 (||c) K-1, -6.6×10-6 (||a) K-1
Thermal expansion coefficient 8×10-6 (||c) K-1, 13×10-6 (||a) K-1
Typical doping level 0.1-2 at. %

Standard specifications

Orientation a-cut, c-cut
Clear aperture >90%
Face dimensions tolerance +0/-0,1 mm
Length tolerance ±0,1 mm
Parallelism error <10 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 R<0,5%@790-810 nm + R<0,2%@1047-1053 nm on both faces
Laser induced damage threshold >10 J/cm2@1064 nm, 10 ps
Mount Unmounted