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    Laser Crystals

    • Product Name: Nd:YLF (Er/Tm/Ho etc.)
    • Dopant Concentration Tolerance :+/- 0.1%
    • Parallelism:< 10 arc seconds
    • Perpendicularity:< 5 arc minutes
    • Chamfer:0.1mm at 45°
    • Clear Aperture:95%
    • Scratch and Dig:10/5
    • Surface Flatness:λ/10 at 633nm
    • Wavefront Distortion:λ/10 at 633nm (< dia7mm) λ/8 at 633nm (≥ dia7mm)
    • Damage Threshold:Over 15 J/cm2 TEM00, 10ns, 10Hz

    Product overview

    Neodymium doped Yttrium Lithium Fluoride (Nd:YLF) is a good performance laser crystal, with low thermal lensing effect and high power. We can offer Nd, Pr, Er, Tm, Ho and no doped YLF crystals performing the specifications upon your request.



    Scitlion is able to offer
    Nd dopand concentration from 0.4% to 1.2% (atm%)
    Er dopand concentration from 0.5% to 3% (mol%)
    Rod diameter from 1mm to 25.4mm
    Length from 1mm to 180mm
    Coating upon your request


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    Nd:YLF Crystal Properties

    Optical Properties  
    Peak Stimulated Emission Cross Section 1.2 x 10-19 cm2 at 1053 nm (E⊥c-axis)
    1.81 x 10-19 cm2 at 1047 nm (E∥c-axis)
    Transparency Region 180 nm to 6.7 μm
    Spontaneous Fluorescence Lifetime 485 μs for 1% Nd
    Scatter Losses < 0.2% cm-1
    Peak Absorption Coefficient (1.2% Nd) a=3.59 cm-1 at 797 nm (E⊥c-axis)
    a=10.8 cm-1 at 792 nm (E∥c-axis)
       
    Physical Properties  
    Chemical Formula LiY1.0xNdxF4
    Crystal Structure Tetragonal
    Lattice Constants a=5.16A  c=10.85A
    Concentration ~ 1.4 x 1020 /cm3 for 1% Nd doped
    Density 3.99 g/cm3
    Melting Point 819℃
    Knoop Hardness 300 Kg/mm2
    Refractive Index 1.82
    Thermal Expansion Coefficient 8.3 x 10-6 /K, 0-250℃along c-axis
    13.3 x 10-6 /K, 0-250℃along c-axis
    Thermal Conductivity 0.063 W/cm/K
    Specific Heat 0.79 J/g K

    dn/dT    
    Wavelength E⊥c-axis E∥c-axis
    436 nm -0.54 x 10-6 /℃ -2.44 x 10-6 /℃
    578 nm -0.91 x 10-6 /℃ -2.86 x 10-6 /℃
    1064 nm -2.00 x 10-6 /℃ -4.30 x 10-6 /℃
         
    Refractive Index    
    Wavelength ‘no ‘ne
    262 nm 1.485 1.51
    350 nm 1.473 1.49
    525 nm 1.456 1.479
    1050 nm 1.488 1.470
    2065 nm 1.442 1.464
    Sellmeier Equation  
    no2 = 1.38757 + 0.70757λ2/(λ2-0.00931) + 0.18849λ2/(λ2-50.99741)
    ne2 = 1.31021 + 0.84903λ2/(λ2-0.00876) + 0.53607λ2/(λ2-134.9566)
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