bainaben

  • YAG based Laser crystals
  • Vanadate based Laser crystals
  • YLF based Laser crystals

    • YLF based Laser crystals

     YLF (Yttrium Lithium Fluoride) features weak thermal lensing, large fluorescence linewidth and naturally polarized oscillation. Using Czochralski technique, LNG Optics provide Nd:YLF, Ho:YLF, Tm:YLF and Pr:YLF with different doping rates. We also accept contract growth of special doped YLF crystals according to customers’ requirements. 

     

    Features & Standard Specifications from LNG Optics:

     

    Laser Rods, Slabs:Flat/Flat, Parallel/Antiparallel wedged, Brewster angle
    Coating: single-band and dual-band AR
     
    Dimension Tolerance: ±0.1mm
    Length Tolerance: ± 0.5mm
    Surface quality: 10/5 S/D
    Surface Flatness: λ/8 @ 633nm
    Wavefront Distortion: λ/4 per inch @ 633nm
    Parallelism: 10 arc seconds (Plano/Plano)
    Perpendicularity: 5 arc minutes
    Chamfer: 0.1mm x 45°
    Barrel finish: 50-80 micro-inch (RMS) or Prepolished
     
    Laser Gain Properties:
    Nd:YLF
    Tm:YLF
    Ho:YLF
    Pr:YLF
    Lasing action
    4 level
    Quasi 3 level
    3 level
    4 level
    Current dopant level in LNG (at%)
    0.5 – 1.1
    2 & 3
     
    0.5
    Lasing wavelength (nm)
    1047&1053/4F3/2→4I11/2
    1900/3F4→3H6
    2050/5I7→5I8
    640/3P0→3F2
    Stimulated Emission Cross-Section 
    (×10-20 cm2)
    18 @ 1047nm
    12 @ 1053nm
    0.2
    0.9
    22
    Spontaneous Fluorescent Lifetime (μs)
    480 @ 1 at%
    14000
    15000
    50
    Refractive Index
    no = 1.4481 
    ne = 1.4704 
    @ 1050nm
    no = 1.448 
    ne = 1.470 
    @ 1064nm
    no=1.448
    ne=1.470
    @ 1064nm
    no=1.443
    ne=1.464
    @ 600nm
    Pump wavelength (nm)
    792
    792
    1940
    444
    * Other transition wavelengths are available upon request.