Crystals Materials
Nd:YLF Crystals application for gain media for laser oscillators and preamplifier
  • Nd3+ Concentration: 0.01% ~ 3%
  • Orientation: a-cut or c-cut
  • Surface Quality: 10/5 Scratch/Dig MIL-O-1380A
  • Parallelism: < 10″
  • Perpendicularity: < 5'
  • Clear Aperture: > 90%
  • Surface Flatness: < λ/10 @ 632.8 nm
  • Coating: AR/HR/PR coating upon customer's request
  • Quality Warranty Period: One year
  • Nd: YLF crystal is an important near infrared laser material. It can generate 1047 nm and 1053 nm wavelength lasers, and pump lasers with a wavelength of 755 nm - 811 nm. It can be used as gain media for laser oscillators and preamplifier.

    The thermal lens effect of Nd:YLF crystal is very small, with a wide fluorescence linewidth and output linearly polarized light.

    Specifications of Nd:YLF Crystal
    Material Nd3+:LiYF4
    Doping 0.1% ~ 3 atm%
    Orientation a-cut or c-cut
    Dimension Tolerances ±0.05 mm
    Surface Quality 10/5 S/D
    Parallelism < 10 arcsec
    Perpendicularity < 5 arcmin
    Clear Aperture > 90%
    Wavefront Distortion λ/10 @ 633 nm
    Surface Flatness < λ/10 @ 632.8 nm
    Chamfer < 0.1 mm @ 45°
    Coating AR/HR/PR coating upon customer's request
    Damage Threshold 750mW/cm2 at 1064 nm, TEM00, 10 ns, 10Hz
    Physical and chemical properties
    Chemical Formula Nd:LiYF4
    Crystal Structure Tetragonal
    Cell Parameters a=5.16 Å , c=10.85 Å
    Space Group I41/a
    Modulus of Elasticity 85 GPa
    Melting Point 819℃
    Mohs Hardness 4~5
    Density 3.99 g/cm³
    Thermal Conductivity 0.063 W/cm/K
    Specific Heat 0.79 J/g/K
    dn/dT -4.6 x 10-6 (||c) K-1
    -6.6 x 10-6 (||a) K-1
    Optical properties
    Laser Transition 4F3/24I11/2
    Laser Wavelength 1047nm (∥c, a-cut crystal)
    1053nm(⊥c, a or c-cut crystal)
    Absorption Peak Wavelength 792 nm
    Peak Absorption Coefficient (for 1.2% Nd) α= 10.8cm-1 (792.0 nm E∥c)
    α= 3.59cm-1 (797.0 nm E⊥c)
    Absorption Bandwidth at Peak Wavelength ~5 nm
    Peak Stimulated Emission Cross Section 1.8 x 10-19/cm2 (E∥c) @ 1047nm
    1.2 x 10-19/cm2 (E⊥c) @ 1053nm
    Fluorescence Lifetime 485 μs (1.0at%-Nd)
    Scatter Losses <0.2%/cm
    Refractive Index no=1.443, ne=1.464 @633 nm
    n o=1.448, ne=1.470 @1064 nm
    Nd3+:YLF Laser Crystals Absorption and Emission

    Stock specification list

    If need other specifications and quantities products, please contact us(
    Part Number Face size Length Doping, atm.% Orientation Coating
    Nd-YLF-001 Φ3.0 mm 20.0 mm 0.7 c-cut AR/AR 808+1053 nm
    Nd-YLF-002 3.0*3.0 mm 10.0 mm 0.7 c-cut AR/AR@1053 nm
    Nd-YLF-003 Φ5.0 mm 10.0 mm 0.7 c-cut AR/AR 808+1053 nm
    Nd-YLF-004 Φ5.0 mm 10.0 mm 0.7 a-cut AR/AR@(790-810)+(1047-1053) nm
    Nd-YLF-005 Φ5.0 mm 100.0 mm 0.7 a-cut AR/AR@(790-810)+(1047-1053) nm


  • Anti-reflection coatings are available at your specified wavelength.
  • Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
  • To inquiry or order a finished Nd:YLF laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Nd-dopant concentration, sizes, and coating. For special request, please specify specification in details for evaluation and fabrication.
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