Your present location:Home
        Products Detail
        • Product name: LiNbO3
        • Product ID: 109
        • Views : 1904

        LiNbO3 Crystal is widely used as frequency doublers for wavelength > 1μm and optical parametric oscillators (OPOs) pumped at 1064 nm and quasi-phase-matched (QPM) devices. Additionally due to its large Electro-Optic(E-O) and Acousto-Optic(A-O) coefficients,, LiNbO3 is the most commonly used material for Pockel Cells,Q-switches and phase nodulators,waveguide substrate,and surface acoustic wave (SAW) wafers,etc.CASTECH can provide high quality and large size LiNbO3 crystals for all of these applications.

                                                           Structural and Physical Properties of LiNbO3

         

         

        Crystal Structure:

        Trigonal, Space group R3C, Point group 3m

        Cell Parameters:

        a=5.148Å , c=13.863 Å

        Melting Point:

        1253°C

        Curie Temperature:

        1140°C

        Mohs Hardness:

        5

        Density:

        4.64 g/cm3

        Elastic Stiffness Coefficients

        CE11= 2.33(×1011N/m)

        CE33= 2.77(×1011N/m)

                                                                Optical and Electro-optical Properties of LiNbO3

         

        Transparency Range:

        420-5200nm

        Optical Homogeneity:

        ~ 5 x 10-5 /cm

        Refractive indices at 1064nm:

        ne = 2.146, no = 2.220 @ 1300 nm
        ne = 2.156, no = 2.232 @ 1064 nm
        ne = 2.203, no = 2.286 @ 632.8 nm

        NLO Coefficients:

        d33 = 86 x d36 (KDP)
        d31 =11.6 x d36 (KDP)
        d22 = 5.6 x d36 (KDP)

        Effective NLO Coefficients:

        deff(I)=d31sinθ-d22cossin3Φ
        deff(II)=d22cos2θcos3Φ

        Electro-Optic Coefficients

        r T33 = 32 pm/V,   rS33 = 31 pm/V,
        rT31 =10 pm/V,     rS31=8.6 pm/V,
        rT22 = 6.8 pm/V,   rS22= 3.4 pm/V,

        Half-Wave Voltage, DC
        Electrical field // z, light z:
        Electrical field // x or y, light // z:

        3.03 KV
        4.02 KV

        Damage Threshold

        100 MW/cm2 (10 ns, 1064nm)

                                                                    Thermal and Electrical Properties of LiNbO

         

        Melting Point:

        1250°C

        Cruie Temperature:

        1140°C

        Thermal Conductivity:

        38W/m/K@25°C

        Thermal Expansion Coefficients(at 25°C):

        // a, 2.0x10-6/K

        // c, 2.2x10-6/K

        Resistivity:

        2x10-6Ω?cm@200°C

        Dielectric Constants:

        εS110­  =43               εT110­ =78  

        εS110­  =28               εT330­  =32  

        Piezoelectric Strain Constant:

        D22=2.04(x10-11C/N)

        D33=19.22(x10-11C/N)

        The Sellmeier equations(λ in μm):

        Specifications
        · Transmitting wavefront distortion: less than λ/4 @ 633 nm
        · Dimension tolerance: (W ± 0.1 mm) x (H ± 0.1 mm) x (L ± 0.2mm)
        · Clear aperture: > 90% central area
        · Flatness: λ/8 @ 633 nm
        · Scratch/Dig code: 20/10 to MIL-PRF-13830B
        · Parallelism: better than 20 arc seconds
        · Perpendicularity: 5 arc minutes
        · Angle tolerance: < ± 0.5°
        · AR coating: dual wave band AR coating at 1064/532 nm on both surfaces, with R < 0.2% at 1064 nm and R < 0.5% at 532 nm per surface. Other coatings are available upon request.