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LN LiNbO3 Single Crystal

ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd.
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    Buy cheap LN LiNbO3 Single Crystal from wholesalers
     
    Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers
    • Buy cheap LN LiNbO3 Single Crystal from wholesalers

    LN LiNbO3 Single Crystal

    Ask Lasest Price
    Brand Name : Crystro
    Model Number : CR210.205-1
    Certification : SGS/COC
    Price : USD 20~200/pc
    Payment Terms : T/T, Western Union, MoneyGram, Paypal
    Supply Ability : 2000pcs per month
    Delivery Time : 4-5 weeks
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    LN LiNbO3 Single Crystal

    Lithium Niobate - LiNbO3 Crystal Material


    LiNbO3 crystal combines low cost, good mechanical and physical properties as well as high optical homogeneity. Therefore, LiNbO3 wedges have been widely used in fiber isolators and circulators.


    LiNbO3 (Lithium niobate, LN) crystal is a negative uniaxial crystal and one of the most thoroughly characterized optical materials. With its wide transparency range in the visible and mid-infradred and the excellent chemical and mechanical stability, LN crystal can be used as a bifrengent material for applications in infrared.


    With its large electro-optic coefficients, wide optical transparency window, and availability of high optical quality crystals, LN (lithium niobate) crystal is often the material of choice for optical modulation and Q-switch at near-infrared and infrared wavelengths. For electro-optic modulators (EOM) the crystal can be z-cut with zero residual birefringence along the direction of light propagation or x-cut with non-zero residual birefringence and the maximized effective electro-optic coefficient. For Q-switch the crystal is typically z-cut with zero residual birefringence and an electric field is applied transverse to the direction of light propagation. The piezoelectric ringing in LN is a disadvantage at high repetition frequency, but can be overcome to some extent with proper piezoelectrically damped designs.

    Both pure LN and MgO doped LN (MgO:LN) crystals with gold coatings on side faces for electrodes are available


    b.Crystro's GGG wafer is grown by Czochralski method.Max diameter reach 4inch,it's now the biggest size in this filed,we can custom size and specs ,rougness<0.5nm.Magneto-optical single crystals like GGG,SGGG,TGG,TSAG are our main products.
    c.Anhui Crystro participate in the kinds exhibitions every year: Laser World of Photonics Munich, Shanghai, Photonics West in San Francisco, CIOE in Shenzhen, etc.

    Crystro provides:

    • LiNbO3 wedges used for fiber optical isolators and circulators.
    • Reliable delivery
    • Strict quality control
    • Technical support
    • Very competitive prices

    Basic Properties of LiNbO3

    Crystal StuructureTrigonal, Space group R3c, Point group 3m
    Melting Point1253℃
    Mohs Hardness5
    Density4.64g/cm3
    DeliquescenceNone
    Optical Homogeneity~5x10-5/cm
    Transparency Range420-5200nm
    Absorption Coefficient~0.1%/cm @1064nm
    Refractive Indices at 1064nmne=2.146, no=2.220@1300nm ne=2.156, no=2.232@1064nm ne=2.203, no=2.286@632.8nm
    Thermal Expansion Coefficients (at 25℃ )//a,2.0x10-6/K //a,2.2x10-6/K
    Thermal Conductivity Coefficients38 W/m/K at 25℃
    Thermal Optical Coefficientsdno/dT=-0.874 x 10-6/K at 1.4μm dne/dT=39.073 x 10-6/K at 1.4μm
    The Sellmeier Equations (λ in μm)no2=4.9048+0.11768/(λ2-0.04750)-0.027169λ2 ne2=4.5820+0.099169/(λ2-0.04443)-0.02195λ2

    Specifications of LiNbO3 wedges

    Aperture1.0 x1.0 mm2 to 4 x 4 mm2
    Dimension Tolerance±0.05mm
    Wedge Angle Tolerance±0.1°
    Optical Axis Orientation±0.5°
    Flatnessλ/4 @632.8nm
    Surface Quality20-10
    AR-CoatingR<0.2% @1550nm±40nm
    Standard Size1.25mmx1.25mmx0.5mm with 13º or 15º wedge, phi=22.5º

    Note: Other sizes and coatings are available upon request.


    Nonlinear Optical Properties:

    NLO Coefficientsd33 = 34.4 pm/V
    d31 = d15 = 5.95 pm/V
    d22 = 3.07 pm/V
    Effective NLO coefficientsdeff =5.7 pm/V for frequency doubling 1300 nm;
    deff =5.3 pm/V for OPO pumped at 1064 nm;
    deff =17.6 pm/V for quasi-phase-matched structure.
    Electro-Optic CoefficientsγT33 = 32 pm/V, γs33 = 31 pm/V,
    γT31 = 10 pm/V, γs31 = 8.6 pm/V,
    γT22 = 6.8 pm/V, γs22 = 3.4 pm/V,
    Photorefractive Damage Threshold50 MW/cm2 (10 ns, 1064 nm)
    Surface Damage Threshold300 MW/cm2 (10 ns, 1064 nm)

    Specifications of LN EO components:

    Wavefront Distortion:Less than λ/8 @ 633 nm
    Dimension Tolerance:(W+/-0.1 mm) x (H+/-0.1 mm) x (L+0.5/-0.1 mm)
    Clear Aperture:> 90% central area
    Flatness:λ/8 @ 633 nm
    Surface Quality:Scratch/Dig 10/5 per MIL-O-13830A
    Parallelism:better than 20 arc seconds
    Perpendicularity:5 arc minutes
    Angle Tolerance:Δθ < 0.5o, Δφ < 0.5o

    LiNbO3 is also widely used as electro-optic modulators and O-switches for Nd: YAG, Nd: YLF and Ti:Sapphire lasers as well as modulators for fiber optics. The following table list the specifications of a typical LiNbO3 crystal used as Q-switch with transverse E-O modulation. The light propagates in z-axis. The electro-optic coefficients of LiNbO3 are: r33= 32 pm/V, r31= 10 pm/V, r22= 6.8 pm/V at at low frequency and r33= 31 pm/V, r31= 8.6 pm/V, r22= 3.4 pm/V at high electric frequency. The halfwave voltage: Vπ=λd/no3γc1, γc=(ne/no)3γ3313.


    LiNbO3 Q-switch Specifications

    Size9 X 9 X25 mm3 or 4 X 4 X 15 mm3
    Other size is available upon request
    Tolerance of SizeZ-axis: ± 0.2mm
    X-axis and Y-axis: ± 0.1mm
    Chanferless than 0.5 mm at
    Accuracy of OrientationZ-axis: < ±5′,X-axis and Y-axis: < ±10′
    Parallelism<20′′
    Finish10/5 scratch/dig
    Flatnessλ/8 at 633nm
    AR-CoatingR<0.2% @1064nm
    ElectrodesGold/Chrome plated on X-faces
    Wavefront Distortion<λ/4 @633nm
    Extinction Ratio>400:1 @633nm, φ 6mm beam

    LiNbO3 is also a good acousto-optic crystal and used for surface acoustic wave (SAW) wafer and A-O modulators. Crystro provides acoustic (SAW) grade LiNbO3 crystals in wafers, as-cut boules, finished components and custom fabricated elements.


    Typical SAW Properties

    Cut TypeSAW Velocity Vs (m/s)Electromechanical Coupling Factor K2s(%)Temperature Coefficient of Velocity TCV (10-6/℃)Temperature Coefficient of Delay TCD (10-6/℃)
    127.86 ° Y-X39705.5-6078
    Y-X34854.3-8595

    Typical Specifications

    SpecificationsBouleWafer
    DiameterΦ3''Φ4''Φ3''Φ4''
    Length or Thickness (mm)≤100≤500.35-0.5
    Orientation127.86°Y,64°Y,135°Y,X,Y,Z, and other cut
    Ref.Flat OrientationX,Y
    Ref.Flat Length22±2mm32±2mm22±2mm32±2mm
    Front Side polishing/Mirror polished 5-15 Å
    Back Side Lapping/0.3-1.0μm
    Flatness (μm)/≤15
    Bow (μm)/≤25

    Crystro can offer other size and specification of wafers upon request.

    Crystal StructureTrigonal, Space group R3C, Point group 3m
    Cell Parametersa=5.148 Å , c=13.863 Å
    Melting Point1253oC
    Curie Temperature1140oC
    Mohs Hardness5
    Density:4.64 g/cm3
    DeliquescenceNone
    Optical Homogeneity~ 5x10-5 /cm
    Transparency Range420 -- 5200 nm
    Absorption Coefficient~0.1%/cm @ 1064 nm
    Refractive indices at 1064nm
    (Pure LN)
    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
    Thermal Expansion Coefficient
    (@ 25oC)
    //a, 2.0x10-6/K
    //c, 16.7x10-6/K
    Thermal Conductivity Coefficient:38 W/m/K at 250 oC
    Thermal Optical Coefficientdno/dT=-0.874x10-6/K at 1.4 µm
    dne/dT=39.073x10-6/K at 1.4 µm
    The Sellmeier equations (Pure LN))
    (λ in µm)
    no2 = 4.9048+0.11768/(λ2-0.04750)-0.027169λ2
    ne2 = 4.5820+0.099169/(λ2-0.04443)-0.021950λ2


    MgO doped LiNbO3 (MgO:LN) has similar linear optical properties to pure LiNbO3, but the photorefractive damage threshold is much higher.

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