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    Tm:YAP
    Product Information :

     


    Tm:YAP is the best LD-pumping laser crystal of 2μm range for its 795nm adsorption band easily accessible with high power AlGaAs diode, high quantum efficiency, good physical, chemical and optical properties, linearly polarized output and wider absorption band of 4nm than Tm:YAG. It can be used in all-solid-state laser of 2μm range in medicine and military fields.

    Advantages of Tm:YAP Crystal

    Good physical, chemical and optical properties

    Higher efficiency at 2μm range compared to Tm:YAG

    Linearly polarized output beam

    Wide absorption band of 4nm compared to Tm:YAG

    More accessible to 795nm with AlGaAs diode than the adsorption peak of Tm:YAG at 785nm

    Specifications

    Dopant concentration

    Tm: 1.0 ~ 4.0 at%

    Orientation

    [100] or [010] within 5°

    Wavefront distortion

    ≤0.125λ/inch@632.8nm

    Rod sizes

    Diameter 2~10mm, Length 2~100mm
    Upon request of customer

    Dimensional tolerances

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

    Barrel finish

    Ground or polished

    Parallelism

    ≤ 10"

    Perpendicularity

    ≤ 5′

    Flatness

    ≤λ/8@632.8nm

    Surface Quality

    10-5(MIL-O-13830A)

    Chamfer

    0.15±0.05mm

    AR Coating Reflectivity

    ≤ 0.25%

    Optical and Spectral Properties

    Laser transition

    3F4→ 3H6

    Absorption cross section

    3.7~8.5 x 10-21cm2

    Fluorescence lifetime

    4.4~7.7 ms

    Emission cross section

    5.0~6.0 x 10-21cm2

    Emission wavelength

    1.98 μm for a axis and 1.94 μm for b axis

    Diode pump band:

    794.8 nm for a axis and 793.5 nm for b axis

    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

    dna/dT=9.7 x 10-6/K

    dnc/dT=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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