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High Quality LN Crystal (LN Pockels Cell) Used in 1064nm Laser System

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LiNbO3 (Lithium Niobate) crystal is a multifunctional material that integrates properties of piezoelectric, ferroelectric, pyroelectric, nonlinear, electro-optical, photoelastic, etc. LiNbO3 has good thermal stability and chemical stability. Periodically Polarized Lithium Niobate (PPLN) is a highly efficient wavelength conversion non-linear crystal with wide light transmission range (0.4-4.5 µm) covering the near and mid-infrared regions, long service life, and can be used for frequency doubling, beat frequency, sum frequency, optical parametric oscillation and optical parametric amplification, etc.


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    High Quality LN Crystal (LN Pockels Cell) Used in 1064nm Laser System,
    ,
    LiNbO3 (Lithium Niobate) crystal is a multifunctional material that integrates properties of piezoelectric, ferroelectric, pyroelectric, nonlinear, electro-optical, photoelastic, etc. LiNbO3 has good thermal stability and chemical stability.

    As one of the most thoroughly characterized nonlinear optical materials, LiNbO3 is suitable for a variety of frequency conversion applications. For example, it is widely used as frequency doublers for wavelength >1 μm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to its large E-O and A-O coefficients, LiNbO3 crystal is also commonly used for phase modulators, waveguide substrate, surface acoustic wave wafers, and Q-switching of Nd:YAG, Nd:YLF and Ti-Sapphire lasers.

    LiNbO3 can be doped with a variety of elements, such as Er, Pr, Mg, Fe, etc., which give the material unique properties. For example, the damage threshold of MgO: LiNbO3 is more than double that of pure LiNbO3.

    PPLN: Periodically Polarized Lithium Niobate (PPLN) is a highly efficient wavelength conversion non-linear crystal with wide light transmission range (0.4-4.5 µm) covering the near and mid-infrared regions, long service life, and can be used for frequency doubling, beat frequency, sum frequency, optical parametric oscillation and optical parametric amplification, etc. Temperature control is required during use. The PPLN OPO process can be used to obtain light with wavelength of 3~4.5 µm, which is difficult to be achieved (as high-efficiency output) with conventional phase matching. Different wavelengths of PPLN correspond to different polarization periods.

    Contact us for the best solution for your application of LiNbO3 and PPLN crystals.

    WISOPTIC Capabilities -LiNbO3

    • Various sizes of finished components for different applications.

    • Strict quality control

    • Reliable delivery

    • Very competitive price

    • Technical support

    WISOPTIC Standard Specifications* - LiNbO3

    Dimension Tolerance ± 0.1 mm
    Angle Tolerance ± 0.5°
    Flatness < λ/8 @ 632.8 nm
    Surface Quality < 20/10 [S/D]
    Parallelism < 20”
    Perpendicularity ≤ 5′
    Chamfer ≤ 0.2mm @ 45°
    Transmitted Wavefront Distortion < λ/4 @ 632.8 nm
    Clear Aperture > 90% central area
    Coating AR coating: R < 0.2% @ 1064 nm, R < 0.5% @ 532 nm
    * Products with special requirement upon request.

    LN-2
    LN-3

    DOWNLOAD Technical Data – LiNbO3

    Advantages of MgO:LiNbO3 compared with LiNbO3

    • Higher frequency doubling (SHG) efficiency for pulsed Nd:YAG (65%) and CW Nd:YAG (45%)

    • Higher performance in applications of OPO, OPA, QPM doublers and integrated waveguide

    • Much higher photorefractive damage threshold

    Primary Applications – LiNbO3

    • Frequency doublers for wavelength >1 μm

    • Optical parametric oscillators (OPO) pumped at 1064 nm

    • Quasi-phase-matched (QPM) devices

    • Q-switches (for Nd:YAG, Nd:YLF and Ti-Sapphire lasers )

    • Phase modulators, waveguide substrate, surface acoustic wave wafers

    Physical Properties – LiNbO3

    Chemical formula LiNbO3
    Crystal structure Trigonal
    Point group 3m
    Space group R3c
    Lattice constants a=5.148 Å, c=13.863 Å, Z = 6
    Density 4.628 g/cm3
    Melting point 1255 °C
    Curie temperature 1140 °C
    Mohs hardness 5
    Thermal conductivity 38 W/(m·K) @ 25°C
    Thermal expansion coefficients 2.0×10-6/K (//a), 2.2×10-6/K (//c)
    Hygroscopicity Non-hygroscopic

    Optical Properties – LiNbO3

    Transparency region
    (at “0” transmittance level)
    400-5500 nm
    Refractive indices 1300 nm 1064 nm 632.8 nm

    ne=2.146

    no=2.220

    ne=2.156

    no=2.232

    ne=2.203

    no=2.286

    Thermal optic coefficients dno/dT=-0.874×10-6/K @ 1.4 μm
    dne/dT=39.073×10-6/K @ 1.4 μm

    Linear absorption coefficients

    326 nm

    1064 nm

    α = 2.0 /cm α = 0.001~0.004 /cm

    NLO coefficients

    d33 = 34.4 pm/V, d22 = 3.07 pm/V,
    d31 = d15 = 5.95 pm/V

    Electro-optic coefficients γT33=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
    Half-wave voltage (DC) Electrical field // z, light ⊥ z 3.03 kV
    Electrical field // x or y, light // z 4.02 kV
    Damage threshold 100 MW/cm2 @ 1064nm, 10 ns

    WISOPTIC Capabilities -LiNbO3
    • Various sizes of finished components for different applications.
    • Strict quality control
    • Reliable delivery
    • Very competitive price
    • Technical support 

    WISOPTIC Standard Specifications
    Dimension Tolerance: ± 0.1 mm
    Angle Tolerance: ± 0.5°
    Flatness: < λ/8 @ 632.8 nm
    Surface Quality: < 20/10 [S/D]
    Parallelism: < 20”
    Perpendicularity: ≤ 5'
    Chamfer: ≤ 0.2mm @ 45°
    Transmitted Wavefront Distortion: < λ/4 @ 632.8 nm
    Clear Aperture: > 90% central area
    Coating AR coating: R < 0.2% @ 1064 nm, R < 0.5% @ 532 nm


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