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    • 摻釹釩酸釔(Nd:YVO4)
     
    摻釹釩酸釔(Nd:YVO4)

     

    摻釹釩酸釔(Nd:YVO4)晶體是一種性能優良的激光晶體,適于制造激光二極管泵浦特別是中低功率的激光器。與Nd:YAG相比Nd:YVO4對泵浦光有較高的吸收系數和更大的受激發射截面。激光二極管泵浦的Nd:YVO4晶體與LBO,BBO,KTP等高非線性系數的晶體配合使用,能夠達到較好的倍頻轉換效率,可以制成輸出近紅外、綠色、藍色到紫外線等類型的全固態激光器?,F在Nd:YVO4激光器已在多個領域得到廣泛的應用。而且Nd:YVO4二極管泵浦固態激光器正在迅速取代傳統的水冷離子激光器和燈泵浦激光器的市場,尤其是在小型化和單縱模輸出方面。

    Capabilities:

    Nd dopant:
    0.27%, 0.3%, 0.4%, 0.5%, 0.7%, 1.0%, 2.0%, 3.0%
    Width x Height:
    1x1 ~ 16x16mm
    Length:
    0.02 ~ 20mm

    Specifications:

    Orientation:
    a-cut( ± 0.5° )
    Dimensional Tolerance:
    +/-0.1mm
    Wavefront Distortion:
    <λ/8 at 633nm
    Surface Quality:
    20/10
    Parallelism:
    < 10 arc seconds
    Perpendicularity:
    < 5 arc minutes
    Surface Flatness:
    <λ/10 at 632.8nm
    Clear Aperture:
    Central 95%
    Chamfer:
    0.15x45°
    Coating:
    1.AR@1064nm R<0.1%
    2.AR@1064nm R< 0.1% & HT@808nm T>95%
    3.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%

    Properties: 

    Atomic Density
    ~1.37x1020 atoms/cm2
    Crystal Structure
    Zircon Tetragonal, space group D4h, a=b=7.12, c=6.29
    Density
    4.22 g/cm3
    Mohs Hardness
    Glass-like, ~5
    Thermal Expansion Coefficient
    aa=4.43x10-6/K, ac=11.37x10-6/K
    Thermal Conductivity Coefficient
    ||C: 5.23 W/m/K; ^C: 5.10 W/m/K
    Lasing Wavelengths
    914nm, 1064 nm, 1342 nm
    Crystal Class
    positive uniaxial, no=na=nb ne=nc
    no=1.9573, ne=2.1652, @ 1064nm
    no=1.9721, ne=2.1858, @ 808nm
    no=2.0210, ne=2.2560, @ 532nm
    Thermal Optical Coefficient
    dna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K
    Stimulated Emission Cross-Section
    25.0x10-19 cm2 , @1064 nm
    Fluorescent Lifetime
    90 ms (about 50 ms for 2 atm% Nd doped) @ 808 nm
    Absorption Coefficient
    31.4 cm-1 @ 808 nm
    Absorption Length
    0.32 mm @ 808 nm
    Intrinsic Loss
    Less 0.1% cm-1 , @1064 nm
    Gain Bandwidth
    0.96 nm (257 GHz) @ 1064 nm
    Polarized Laser Emission
    p parallel to optic axis (c-axis)
    Diode Pumped Optical to Optical fficiency
    > 60%

    Sellmeier Equation (for pure YVO4 crystals)
    no2=3.77834+0.069736/(l2 - 0.04724) - 0.0108133l2
    no2=4.59905+0.110534/(l2 - 0.04813) - 0.0122676l2

     

    Note: Kinds of sizes, coating are available upon request.


       PDF to download

     
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