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    • LiNbO3 and MgO:LiNbO3
     
    LiNbO3 and MgO:LiNbO3

     

    鈮酸鋰(LiNbO3)晶體被廣泛用作1000nm以上波長(zhǎng)的倍頻和1064nm泵浦光的光參量放大,也可做準(zhǔn)相位匹配. 同時(shí),鈮酸鋰晶體也被廣泛應(yīng)用于光電調(diào)節(jié)器及波導(dǎo)材料,和用作Nd:YAG,Nd:YLF和摻Ti的藍(lán)寶石激光Q開關(guān). 美揚(yáng)光電公司可為上述用途提供各種規(guī)格的高質(zhì)量,大尺寸的鈮酸鋰晶體. 

    Main Features:
     

    • Large Electro-Optic (E-O) coefficients
    • Large Acousto-Optic (A-O) coefficients

    Typical Applications:

    • Frequency doublers
    • Optical parametric oscillators (OPO)
    • Quasi-phase-matched (QPM) device
    • Q-switches and modulator

    Specifications:

    Dimensional Tolerance
    ±0.1mm
    Angle Tolerance
    ±0.5deg
    Wavefront Distortion
    <λ/4 @ 633nm
    Surface Flatness
    <λ/8 @ 633 nm
    Surface Quality
    20/10 Scratch and Dig
    Parallelism
    < 20 arc seconds
    Perpendicularity
    < 5 arc minuntes
    Clear Aperture
    > Central 90%
    AR-Coating
    dual waveband AR coating @1064/532 nm on both surfaces, with R < 0.2% @ 1064 nm and R < 0.5% @ 0.532 nm per surface

     Physical and Optical Properties
     

    Crystal Structure
    Trigonal, space group R3c
    Cell Parameters
    a = 0.515?, c = 13.863?, Z = 6?
    Melting Point
    1255±5oC
    Curie Point
    1140±5oC
    Mohs Hardness
    5
    Density
    4.64 g/cm3
    Absorption Coefficient
    ~ 0.1%/cm @ 1064 nm
    Solubility:
    insoluble in H2O
    Relative Dielectric Constant
    eT11/e0: 85
    eT33/e0: 29.5
    Thermal Expansion Coefficients( @ 25oC)
    ||a, 2.0 x 10-6/K
    ||c, 2.2 x 10-6/K
    Thermal Conductivity
    38 W /m /K @ 25oC
    Transparency Range
    420 - 5200 nm
    Optical Homogeneity
    ~ 5 x 10-5 /cm
    Sellmeier Equations( l in mm)
    no2(l) = 4.9048+0.11768/(l2 - 0.04750) - 0.027169 l2
    ne2(l) = 4.5820+0.099169/(l2- 0.04443) - 0.021950 l2
    NLO Coefficients
    d33 = 34.4 pm/V
    d31 = d15 = 5.95 pm/V
    d22 = 3.07 pm/V
    Electro-Optic Coefficients
    gT33 = 32 pm/V, gS33 = 31 pm/V
    gT31 = 10 pm/V, gS31 = 8.6 pm/V
    gT22 = 6.8 pm/V, gS22 = 3.4 pm/V
    Half-Wave Voltage, DC
    Electrical field ||z, light ^ z 3.03 KV
    Electrical field ||x or y, light || z 4.02 KV
    Efficiency NLO Coefficients
    deff=5.7pm/V or~14.6xd36(KDP) for frequency doubling 1300 nm;
    deff=5.3pm/V or~13.6xd36(KDP) for OPO pumped at 1300nm;
    deff=17.6pm/V or~45xd36(KDP) for quasi-phase-matched structure;
    Damage Threshold
    200 MW/cm2

    Standard Products Series

    MT- Optics,Inc. can provide LiNbO3 products used for many applications, such as E-O modulator, waveguide substrate, frequency doubling, SAW wafer application and etc.
     

    1. E-O modulator

    Part No.
    Dimension
    Cut
    Coating
    Electrode
    LNO001
    3x3x15mm
    Z-cut
    AR/AR@1064nm
    Au on X face
    LNO002
    4x4x15mm
    Z-cut
    AR/AR@1064nm
    Au on X face
    LNO003
    6x6x25mm
    Z-cut
    AR/AR@1064nm
    Au on X face
    LNO004
    9x9x25mm
    Z-cut
    AR/AR@1064nm
    Au on X face

    2. Waveguide substrate
     

    Part No.
    Dimension
    End faces
    LNO101
    50x50x1mm
    One surface polished, reverse fine ground

    3. SAW Wafer

    Part No.
    Dimension
    Thickness
    End faces
    LNO201
    76.2mm
    0.5mm
    One surface polished, reverse fine ground

    Note: 127.86deg Y cut, Y-cut, Z-cut and other cut also can be provided upon request.
     

    Magnesium Oxide Doped Lithium Niobate Crystal

    Compared with LiNbO3 crystal, MgO:LiNbO3 crystal exhibits its particular advantages for NCPM
    frequency doubling (SHG) of Nd:Lasers, mixing (SFG) and optical parametric oscillators
    (OPOs). MgO:LiNbO3 is also a good crystal for optical parametric oscillators (OPOs) and
    amplifiers (OPAs), quasi-phase-matched doublers and integrated waveguide.

    MgO:LiNbO3 has similar effective nonlinear coefficients to pure LiNbO3 . Its Sellmeier equations
    (for MgO dopant 7 mol%) are:

    no2=4.8762+0.11554/(λ2 - 0.04674) - 0.033119λ2

    ne2=4.5469+0.094779/(λ2 - 0.04439) - 0.026721λ2


    Lithium Tantalate Crystal

    LiTaO3 crystal is also widely used as electro-optic modulator, with NLO and E-O properties
    similar to those of LiNbO3 but higher damage threshold (>500 MW/cm for ns pulsed).
     

     

    Note: 127.86deg Y cut, Y-cut, Z-cut and other cut also can be provided upon request.


       PDF to download

     
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