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Nd:YLF 

Crystals >>> Laser Crystals >>> Nd:YLF Crystal

Main Specifications
Nd dopant concentration 0.4 ~ 1.2 at%
Diameter 2mm ~ 10mm
Length 1mm ~ 150mm
Orientation a-axis or c-axis <2o 
Wavefront distortion <λ/4 at 633nm
Parallelism < 10 arc seconds
Perpendicularity < 5 arc minutes
Chamfer 0.13 � 0.07mm @ 45o
Surface quality better than 10/5 Scratch/Dig per MIL-O-1380A
Surface flatness <λ/8 at 633nm
End coating R<0.15%@1047/1053nm

 

Physical Properties  
Chemical Formula LiY 1.0-xNdxF4
Lattice Parameters a=5.16�
b=10.85�
Crystal Structure Tetragonal
Space Group I41/a
Nd atoms/cm3 1.40x1020 atoms/cm3 for 1% Nd doping,
Mohs Hardness 4 ~ 5
Melting Point 819
Density 3.99 g/cm3
Modulus of Elasticity 85 GPa
Thermal Expansion Coefficient 8.3x10-6/k ^c, ac=13.3x10-6/k ||c
Thermal Conductivity Coefficient 0.063 W/cm K
Specific Heat 0.79 J/g K
Optical Properties
Transparency Region 180nm to 6.7mm
Peak Simulation Emission Cross Section 1.8x10-19cm2 (E || c) at 1.047mm
1.2x10-19cm2 (E
^ c) at 1.053mm
Spontaneous Fluorescence Lifetime 485ms for 1% Nd doping
Scatter Losses <0.2% / cm
Peak Absorption Coefficient a=10.8cm-1 (792.0 nm E || c)
a=3.59cm-1 (797.0 nm E ^ c)
Refractive Indices
Wavelength (nm) ne ne
262 1.485 1.511
350 1.473 1.491
525 1.456 1.479
1050 1.448 1.470
2065 1.442 1.464
Sellmeier Equations ni2(l) = A + Bl2/(l2-C) - Dl2/(l2-E)
A B C D E

no

3.38757

0.70757 0.00931 0.18849 50.99741

n2

1.31021

0.84903 0.00876 0.53607 134.9566

   

   

   
 

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