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        • Product name: Nd:GdVO4
        • Product ID: 118
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        description:

        Neodymium Doped Gadolinium Orthovanadate(Nd:GdVO4)
        CASTECH’s Nd:GdVO4 is featured by
            • Large stimulated emission cross section at laser wavelength;
            • High absorption coefficient and wide bandwidth at pump wavelength;
            • Low dependency on pump wavelength;
            • Good thermal conductivity;
            • Low lasing threshold and high slope efficiency;
            • High laser induced damage threshold;
            • Strongly-polarized laser output.  

        Specifications of Nd:GdVO4

        Crystal structure

         Tetragona

        Space Group

         I41/amd

        Lattice paramete

         a=0.721nm, b=0.635nm

        Lasing Transition

        4F3/2 → 4I11/2

        Lasing wavelength

         1062.9nm

        Emission Cross Section (at 1064nm)

         7.6x10-19 cm2

        Absorption Cross Section (at 808nm)

         4.9x10-19  cm2

        Absorption Coefficient (at 808nm)

         74cm-1

        Index of Refractivity (at 1064nm)

         n0=1.972,   ne=2.192

        Thermal Conductivity (<110>)

         11.7W/(mxK)

        Density

         5.47g/cm3

        Nd Dopent level (atomic)

         0.1%, 0.2%, 0.3%, 0.5%, 0.7%, 1.0%...

        Information Regarding Neodymium Laser Host Crystals

        Crystal Nd:YVO4 Nd:GdVO4 Nd:YAG
        Laser wavelengths 1064.3nm,1342.0nm 1062.9nm,1340nm 1064.2nm,1338.2nm
        Emission bandwidth (linewidth at 1064nm) 0.8nm No dara 0.45nm
        Effective laser cross section (emission cross section at 1064nm) 15.6x10-19cm2 7.6x10-19cm-2 6.5x10-10cm-2
        Polarization Parallel to c-axis Parallel to c-axis unpolarized
        Radioactive lifetime (microseconds) at 1% Nd doping ~ 100μs ~ 95μs 230μs
        Pump wavelength 808.5nm 808.4nm 807.5nm
        Peak pump absorption at 1% doping ~ 41 cm-1 ~ 57 cm-1  
        Thermal conductivity, W/nK 5.1 11.7(Ref.7) 14
        Doping concentration range 0.1-3.0% 0.1-3.0% 0.1-2.0%

        Material Properties:Comparing Nd:GdVO4 and Nd:YVO4

        Crystal Nd:GdVO4 Nd:YVO4
        Crystal Structure,Space Group Tetragonal,141/amd tetragonal,141/amd
        Lattice constants,nm a:0.721     b:0.635 a:0.721     b:0.629
        Melting temperature,℃ 1780 1825
        Thermal expansion@25℃, X10-6/℃ a 1.5 a 4.43
        b 7.3 b 11.4
        Specific heat@25℃,cal/mol K 32.6 24.6
        dn/dT, x10-6/℃ 4.7 2.7

        CASTECH Warranty on Nd:GdVO4 Specifications
        • Transmitting wavefront distortion:less than λ/4 @ 633nm
        • Dimension tolerance:(W±0.1mm)x(H±0.1mm)x(L+0.2mm/-0.1)
        • Clear aperture:>90% central area
        • Flatness: λ/8 @ 633 nm, and λ/4 @ 633nm for thickness less than 2mm
        • Scratch/Dig code: 10/5 to MIL-PRF-13830B
        • Parallelism:better than 20 arc seconds
        • Perpendicularity: 5 arc minutes
        • Angle tolerance:<±0.5°
        • AR coating: R<0.2% at 1064nm
        •     HR coating:R>99.8%@1064nm,T>95%@808nm
        • Quality Warranty Period:one year under proper use.