Crystals Materials

Pr:YLF Crystals

for aerospace, medical, and industrial applications
pr-ylf-laser-crystal
  • Pr Concentration: 0.1 ~ 2 at.%
  • 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

    • Pr3+:YLF crystal has been found to be a promising laser material for producing visible lasers directly and UV lasers through intracavity second-harmonic generation. Under LD pump with wavelength of 444 nm, Pr: YLF Crystal has five relatively strong absorption peaks, which are 523 nm, 604 nm, 640 nm, 698 nm and 720 nm respectively. Among them, 570 to 620 nm laser light source has many applications in environmental and medical fields. The laser with 720 nm Pr: YLF Crystal doubling frequency into 360 nm wavelength through nonlinear crystal has also made great contribution to the micro manufacturing industry.

    Specifications of Pr:YLF Crystal

    Material Pr:LiYF4
    Doping 0.1 ~ 2 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 > 5J/cm2@532nm, 10ns

    Physical and chemical properties

    Crystal Structure tetragonal
    Lattice Constants a=5.164 Å, c=10.732 Å
    Specific Mass 3.95 g/cm3
    Melting Point 819°C
    Thermal Conductivity 6 W/m/K
    Mohs Hardness 5
    Thermal Expansion ~16 × 10-6 K-1

    Optical properties

    Absorption Peak Wavelength 444 nm
    Absorption Cross-section at Peak 8 × 10-20 cm2
    Absorption Bandwidth at Peak Wavelength ~5 nm
    Laser Wavelengths 523 nm, 607 nm, 639 nm, 698 nm, 721 nm
    Emission Cross-section 20 × 10-20 cm2
    Refractive Index @1064 nm no=1.448, ne=1.470
    dn/dT -5.2 × 10-6 (||c) K-1, -7.6 × 10-6 (||a) K-1
    Thermal Expansion Coefficient ~16 × 10-6 K-1
    Typical Doping Level <1 at.%

    Stock specification list

    If need other specifications and quantities products, please contact us(sales@aogcrystal.com).
    Part Number Face size Length Doping, atm.% Orientation Coating
    Pr-YLF-001 2.0*2.0 mm 6.0 mm 0.5 a-cut AR/AR@440-444 nm+500-725 nm
    Pr-YLF-002 Φ3.0 mm 6.0 mm 0.5 a-cut AR/AR@440-444 nm+500-725 nm
    Nd-YLF-003 3.0*3.0 mm 5.0 mm 0.5 a-cut HR@522 nm+AR@444 nm/AR@522 nm

    Notes

  • 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 Pr:YLF laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Pr-dopant concentration, sizes, and coating. For special request, please specify specification in details for evaluation and fabrication.

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