HOME Products Nonlinear Crystals LiNbO3 Crystal

LiNbO3 Crystal

       
  Applications Widely used as frequency doublers for wavelength > 1 mm
    Widely used as optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices.
    Used in laser frequency doublers, and quasi-phase-matched doublers
    Used in waveguide substrate and surface acoustic wave (SAW) wafers
       
  Features Large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients.
    High homogeneity
    Good mechanical and chemical stability
    Absorption loss < 0,1 %/cm @ 1064 nm
     
       
Main Specification Material LiNbO3
Orientation accuracy of cut angle <30 arc min
Coating 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.
Angle tolerance < ± 0.5°
Dimension tolerance (W ± 0.1 mm) × (H ± 0.1 mm) × (L ± 0.2mm)
Flatness <λ/8 @ 632.8 nm
Surface quality 20/10 to MIL-PRF-13830B
Parallelism < 20 arc sec
Transmitting Wavefront distortion <λ/4 @ 633 nm
Clear aperture > 90% central area
Physical Properties Crystal Structure Trigonal, Space group R3C, Point group 3m
Lattice parameters a = 0.515, c = 13.863, Z = 6
Melting Point 1255 +/-5°C
Curie Point or  Temperature 1140 +/-5°C
Optical Homogeneity ~ 5 x 10-5 /cm
Hardness 5
Density 4.64 g/cm3
Absorption Coefficient ~ 0.1%/cm @ 1064 nm
Resistivity 2x10-6Ω/cm@200°C
Relative Dielectric Constant a1 = 11 x 10-6 °C-1
a2 = 9 x 10-6 °C-1
a3 = 0.6 x 10-6 °C-1
Dielectric constant εS110­  =43               εT110­ =78 
εS110­  =28               εT330­  =32  
Piezoelectric Strain Constant D22=2.04(x10-11C/N)
D33=19.22(x10-11C/N)
Thermal Expansion Coefficients // a, 2.0x10-6/K
(in the range of 25°C- 900°C) // c, 2.2x10-6/K
Thermal Conductivity 38 W /m /K @ 25°C
Elastic Stiffness Coefficients CE11= 2.33(×1011N/m2  )
CE33= 2.77(×1011N/m2  )
Linear Optical Properties Transparency Range 420 - 5200 nm
Refractive Indices ne = 2.146, no = 2.220 @ 1300 nm
ne = 2.156, no = 2.322 @ 1064 nm
ne = 2.203, no = 2.286 @ 632.8 nm
at 1064nm
Sellmeier Equations no2(l) = 4.9048+0.11768/(l2 - 0.04750) - 0.027169 l2
ne2(l) = 4.5820+0.099169/(l2- 0.04443) - 0.021950 l2
l in mm)
Nonlinear Optical Properties NLO coefficients d33 = 34.4 pm/V
d31 = d15 = 5.95 pm/V
d22 = 3.07 pm/V
Effective nonlinear optical coefficients deff=5.7pm/V or~14.6×d36(KDP) for frequency doubling 1300 nm;
deff=5.3pm/V or~13.6×d36(KDP) for OPO pumped at 1300nm;
deff=17.6pm/V or~45×d36(KDP) for quasi-phase-matched structure;
Electro-Optic Coefficients 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 3.03 KV
Electrical field ||z, light ^ z 4.02 KV
Electrical field ||x or y, light || z  
Damage Threshold >250 MW/cm2 for 10 ns pulses @ 1064 nm
       
  Notice Engineers can select and design the best solution for you, if the main parameters of your laser are  provided, such as energy per pulse, pulse width and repetition rate for a pulsed laser, power for a cw laser, laser beam diameter, mode condition, divergence, wavelength tuning range, etc.