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    Nd:YAP
    Product Information :

     

    Nd:YAP is a well-known laser crystal for high output power resonators, and especially suitable for lasers with electro-optic cells or harmonic generators for its polarized output. The 1340nm emission wavelength of Nd:YAP is more advantageous for application in laser medicine than 1319nm emission wavelength of Nd:YAG.

    Advantages of Nd:YAP Crystals

    Comparable threshold and slope efficiency at 1079nm to Nd:YAG at 1064nm

    Higher efficiency at 1340nm compared to Nd:YAG at 1319nm

    Linearly polarized output beam

    Higher absorption in water and body fluid of 1340nm compared to 1319nm

    Specifications

    Dopant concentration

    Nd: 0.7-0.9 at% for cw and pulse at 1079nm
    0.85~0.95 at% for cw at 1340nm
    Other dopant concentrations are available upon request.

    Orientation

    [010] within 5°

    Rod sizes

    Diameter 2~10mm, Length 20~150mm
    Upon request of customer

    Dimensional tolerances

    Diameter: +0.00/-0.05mm, Length: ± 0.5mm

    Barrel finish

    Ground and polished

    Parallelism

    ≤ 10"

    Perpendicularity

    ≤ 5′

    Flatness

    ≤ λ/10 @632.8nm

    Surface Quality

    10-5(MIL-O-13830A)

    Chamfer

    0.15±0.05mm

    AR Coating Reflectivity

    ≤ 0.25% (@1064nm)

    Optical and Spectral Properties

    Laser transition

    4F3/2→4I9/2 for 930nm

    4F3/2→4I11/2 for 1079nm

    4F3/2→4I13/2 for 1340nm

    Fluorescence lifetime

    180μs

    Emission cross section

    2.4 x 10-19 cm2(1079 nm)
    1.22 x 10-19 cm2(1340 nm)

    Diode pump band

    803 nm for E∥c
    807 nm for E∥a

    Physical and Chemical Properties

    Crystal Structure

    Orthorhombic

    Lattice Constant

    a = 0.518 nm
    b = 0.532 nm
    c = 0.736 nm

    Density

    5.35 g/cm3

    Mohs Hardness

    8.5

    Refractive Index n

    na=1.91,nb=1.92,nc=1.94

    dn/dT

    na : 9.7 x 10-6 /K
    nc : 14.5 x 10-6/K

    Thermal Conductivity

    11W/(m·K)

    Thermal Expansion

    a: 9.5 x 10-6/K
    b: 4.2 x 10-6/K
    c: 10.8 x 10-6/K

    Specific Heat

    400 J/(kg K)

    Melting Point

    1870 °C





     
     
     
     
     


       
       
     
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