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            福州高特光電科技有限公司

             Nd:YVO4 crystal is one of the most efficient laser host crystal currently existing for diode laser pumped solid state lasers. Its large stimulated emission cross-section at lasing wavelength, high absorption coefficient and wide absorption bandwidth at pump wavelength, high laser induced damage threshold as well as good physical, optical and mechanical properties make Nd:YVO4 an excellent crystal for high power, stable and cost effective diode pumped solid-state lasers.

            Main Features

            Low lasing threshold and high slope efficiency
            Low dependency on pump wavelength
            Large stimulated emission cross-section at lasing wavelength
            High absorption over a wide pumping wavelength bandwidth
            Optically uniaxial and large birefringence emits polarized laser


            Typical Applications

            For Single-longitudinal-mode output and compact design
            Diode laser-pumped Nd:YVO4 compact laser and its frequency-doubled green, red or blue laser will be the ideal laser tools of machining, material processing, spectroscopy, wafer inspection, light show, medical diagnostics, laser printing and other most widespread applications


            Specifications
             

            Nd Dopant Level0.1 - 5.0 atm%
            Standard Dimensions3x3x3 mm3, 3x3x1 mm3, 3x3x0.5 mm3
            Wavefront Distortionλ/8@ 633nm
            ScatteringInvisible, probed with a He-Ne laser
            Orientation Tolerance±0.5deg
            Dimensional Tolerance±0.1mm
            End-faces ConfigurationPlano/Plano
            Surface Flatnessλ/10 at 633 nm
            Surface Quality10/5 Scratch and Dig
            Parallelism< 10 arc seconds
            Clear Aperture> Central 90%
            Intrinsic Loss< 0.1%cm-1
            Physical Properties

            Atomic Density~1.37x1020 atoms/cm3
            Crystal StructureZircon Tetragonal, space group D4h
            a=b=7.12, c=6.29
            Density4.22 g/cm3
            Mohs HardnessGlass-like, ~5
            Thermal Expansion Coefficienta=4.43x10-6/K, c=11.37x10-6/K

            Optical Properties (typically for 1.1 atm% Nd:YVO4, a-cut crystals)

            Lasing Wavelengths914nm, 1064 nm, 1342 nm
            Thermal Optical Coefficientdna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K
            Stimulated Emission Cross-Section25.0x10-19cm2 @1064 nm
            Fluorescent Lifetime90us @808 nm, (50us @808 nm for 2atm% Nd doped)
            Absorption Coefficient31.4 cm-1@808 nm
            Absorption Length0.32 mm @808 nm
            Intrinsic LossLess than 0.1% cm-1@1064 nm
            Gain Bandwidth0.96 nm (257 GHz) @1064 nm
            Polarized Laser Emissionp polarization, Parallel to optic axis (c-axis)
            Diode Pumped Optical to Optical Efficiency> 60%
            Crystal ClassPositive 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
            Sellmeier Equation
            (for pure YVO4 crystals, λ in um)
            no2=3.77834+0.069736/(λ2-0.04724) - 0.0108133λ2 ne2=4.59905+0.110534/(λ2-0.04813) - 0.0122676λ2

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